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This artist’s concept shows what the isolated planetary-mass object SIMP 0136 could look like based on recent observations from NASA’s James Webb Space Telescope and previous observations from Hubble, Spitzer, and numerous ground-based telescopes. Credits:
NASA, ESA, CSA, and Joseph Olmsted (STScI) An international team of researchers has discovered that previously observed variations in brightness of a free-floating planetary-mass object known as SIMP 0136 must be the result of a complex combination of atmospheric factors, and cannot be explained by clouds alone.
Using NASA’s James Webb Space Telescope to monitor a broad spectrum of infrared light emitted over two full rotation periods by SIMP 0136, the team was able to detect variations in cloud layers, temperature, and carbon chemistry that were previously hidden from view.
The results provide crucial insight into the three-dimensional complexity of gas giant atmospheres within and beyond our solar system. Detailed characterization of objects like these is essential preparation for direct imaging of exoplanets, planets outside our solar system, with NASA’s Nancy Grace Roman Space Telescope, which is scheduled to begin operations in 2027.
Rapidly Rotating, Free-Floating
SIMP 0136 is a rapidly rotating, free-floating object roughly 13 times the mass of Jupiter, located in the Milky Way just 20 light-years from Earth. Although it is not classified as a gas giant exoplanet — it doesn’t orbit a star and may instead be a brown dwarf — SIMP 0136 is an ideal target for exo-meteorology: It is the brightest object of its kind in the northern sky. Because it is isolated, it can be observed with no fear of light contamination or variability caused by a host star. And its short rotation period of just 2.4 hours makes it possible to survey very efficiently.
Prior to the Webb observations, SIMP 0136 had been studied extensively using ground-based observatories and NASA’s Hubble and Spitzer space telescopes.
“We already knew that it varies in brightness, and we were confident that there are patchy cloud layers that rotate in and out of view and evolve over time,” explained Allison McCarthy, doctoral student at Boston University and lead author on a study published today in The Astrophysical Journal Letters. “We also thought there could be temperature variations, chemical reactions, and possibly some effects of auroral activity affecting the brightness, but we weren’t sure.”
To figure it out, the team needed Webb’s ability to measure very precise changes in brightness over a broad range of wavelengths.
Graphic A: Isolated Planetary-Mass Object SIMP 0136 (Artist’s Concept)
This artist’s concept shows what the isolated planetary-mass object SIMP 0136 could look like based on recent observations from NASA’s James Webb Space Telescope and previous observations from Hubble, Spitzer, and numerous ground-based telescopes. Researchers used Webb’s NIRSpec (Near-Infrared Spectrograph) and MIRI (Mid-Infrared Instrument) to measure subtle changes in the brightness of infrared light as the object completed two 2.4-hour rotations. By analyzing the change in brightness of different wavelengths over time, they were able to detect variability in cloud cover at different depths, temperature variations in the upper atmosphere, and changes in carbon chemistry as different sides of the object rotated in and out of view. This illustration is based on Webb’s spectroscopic observations. Webb has not captured a direct image of the object. NASA, ESA, CSA, and Joseph Olmsted (STScI) Charting Thousands of Infrared Rainbows
Using NIRSpec (Near-Infrared Spectrograph), Webb captured thousands of individual 0.6- to 5.3-micron spectra — one every 1.8 seconds over more than three hours as the object completed one full rotation. This was immediately followed by an observation with MIRI (Mid-Infrared Instrument), which collected hundreds of spectroscopic measurements of 5- to 14-micron light — one every 19.2 seconds, over another rotation.
The result was hundreds of detailed light curves, each showing the change in brightness of a very precise wavelength (color) as different sides of the object rotated into view.
“To see the full spectrum of this object change over the course of minutes was incredible,” said principal investigator Johanna Vos, from Trinity College Dublin. “Until now, we only had a little slice of the near-infrared spectrum from Hubble, and a few brightness measurements from Spitzer.”
The team noticed almost immediately that there were several distinct light-curve shapes. At any given time, some wavelengths were growing brighter, while others were becoming dimmer or not changing much at all. A number of different factors must be affecting the brightness variations.
“Imagine watching Earth from far away. If you were to look at each color separately, you would see different patterns that tell you something about its surface and atmosphere, even if you couldn’t make out the individual features,” explained co-author Philip Muirhead, also from Boston University. “Blue would increase as oceans rotate into view. Changes in brown and green would tell you something about soil and vegetation.”
Graphic B: Isolated Planetary-Mass Object SIMP 0136 (NIRSpec Light Curves)
These light curves show the change in brightness of three different sets of wavelengths (colors) of near-infrared light coming from the isolated planetary-mass object SIMP 0136 as it rotated. The light was captured by Webb’s NIRSpec (Near-Infrared Spectrograph), which collected a total of 5,726 spectra — one every 1.8 seconds — over the course of about 3 hours on July 23, 2023. The variations in brightness are thought to be related to different atmospheric features — deep clouds composed of iron particles, higher clouds made of tiny grains of silicate minerals, and high-altitude hot and cold spots — rotating in and out of view. The diagram at the right illustrates the possible structure of SIMP 0136’s atmosphere, with the colored arrows representing the same wavelengths of light shown in the light curves. Thick arrows represent more (brighter) light; thin arrows represent less (dimmer) light. NASA, ESA, CSA, and Joseph Olmsted (STScI) Patchy Clouds, Hot Spots, and Carbon Chemistry
To figure out what could be causing the variability on SIMP 0136, the team used atmospheric models to show where in the atmosphere each wavelength of light was originating.
“Different wavelengths provide information about different depths in the atmosphere,” explained McCarthy. “We started to realize that the wavelengths that had the most similar light-curve shapes also probed the same depths, which reinforced this idea that they must be caused by the same mechanism.”
One group of wavelengths, for example, originates deep in the atmosphere where there could be patchy clouds made of iron particles. A second group comes from higher clouds thought to be made of tiny grains of silicate minerals. The variations in both of these light curves are related to patchiness of the cloud layers.
A third group of wavelengths originates at very high altitude, far above the clouds, and seems to track temperature. Bright “hot spots” could be related to auroras that were previously detected at radio wavelengths, or to upwelling of hot gas from deeper in the atmosphere.
Some of the light curves cannot be explained by either clouds or temperature, but instead show variations related to atmospheric carbon chemistry. There could be pockets of carbon monoxide and carbon dioxide rotating in and out of view, or chemical reactions causing the atmosphere to change over time.
“We haven’t really figured out the chemistry part of the puzzle yet,” said Vos. “But these results are really exciting because they are showing us that the abundances of molecules like methane and carbon dioxide could change from place to place and over time. If we are looking at an exoplanet and can get only one measurement, we need to consider that it might not be representative of the entire planet.”
This research was conducted as part of Webb’s General Observer Program 3548.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
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Hannah Braun – hbraun@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA’s IXPE (Imaging X-ray Polarimetry Explorer) has helped astronomers better understand the shapes of structures essential to a black hole – specifically, the disk of material swirling around it, and the shifting plasma region called the corona.
The stellar-mass black hole, part of the binary system Swift J1727.8-1613, was discovered in the summer of 2023 during an unusual brightening event that briefly caused it to outshine nearly all other X-ray sources. It is the first of its kind to be observed by IXPE as it goes through the start, peak, and conclusion of an X-ray outburst like this.
This illustration shows NASA’s Imaging X-ray Polarimetry Explorer (IXPE) spacecraft, at lower left, observing the newly discovered binary system Swift J1727.8-1613 from a distance. At the center is a black hole surrounded by an accretion disk, shown in yellow and orange, and a hot, shifting corona, shown in blue. The black hole is siphoning off gas from its companion star, seen behind the black hole as an orange disk. Jets of fast-moving, superheated particles stream from both poles of the black hole. Author: Marie Novotná Swift J1727 is the subject of a series of new studies published in The Astrophysical Journal and Astronomy & Astrophysics. Scientists say the findings provide new insight into the behavior and evolution of black hole X-ray binary systems.
“This outburst evolved incredibly quickly,” said astrophysicist Alexandra Veledina, a permanent researcher at the University of Turku, Finland. “From our first detection of the outburst, it took Swift J1727 just days to peak. By then, IXPE and numerous other telescopes and instruments were already collecting data. It was exhilarating to observe the outburst all the way through its return to inactivity.”
Until late 2023, Swift J1727 briefly remained brighter than the Crab Nebula, the standard X-ray “candle” used to provide a baseline for units of X-ray brightness. Such outbursts are not unusual among binary star systems, but rarely do they occur so brightly and so close to home – just 8,800 light years from Earth. The binary system was named in honor of the Swift Gamma-ray Burst Mission which initially detected the outburst with its Burst Alert Telescope on Aug. 24, 2023, resulting in the discovery of the black hole.
X-ray binary systems typically include two close-proximity stars at different stages of their lifecycle. When the elder star runs out of fuel, it explodes in a supernova, leaving behind a neutron star, white dwarf, or black hole. In the case of Swift J1727, the powerful gravity of the resulting black hole stripped material from its companion star, heating the material to more than 1.8 million degrees Fahrenheit and producing a vast outpouring of X-rays. This matter formed an accretion disk and can include a superheated corona. At the poles of the black hole, matter also can escape from the binary system in the form of relativistic jets.
IXPE, which has helped NASA and researchers study all these phenomena, specializes in X-ray polarization, the characteristic of light that helps map the shape and structure of such ultra-powerful energy sources, illuminating their inner workings even when they’re too distant for us to see directly.
Because light itself can’t escape their gravity, we can’t see black holes. We can only observe what is happening around them and draw conclusions about the mechanisms and processes that occur there. IXPE is crucial to that work.
/wp-content/plugins/nasa-blocks/assets/images/article-templates/anne-mcclain.jpg Alexandra Veledina
NASA Astrophysicist
“Because light itself can’t escape their gravity, we can’t see black holes,” Veledina said. “We can only observe what is happening around them and draw conclusions about the mechanisms and processes that occur there. IXPE is crucial to that work.”
Two of the IXPE-based studies of Swift J1727, led by Veledina and Adam Ingram, a researcher at Newcastle University in Newcastle-upon-Tyne, England, focused on the first phases of the outburst. During the brief period of months when the source became exceptionally bright, the corona was the main source of observed X-ray radiation.
“IXPE documented polarization of X-ray radiation traveling along the estimated direction of the black hole jet, hence the hot plasma is extended in the accretion disk plane,” Veledina said. “Similar findings were reported in the persistent black hole binary Cygnus X-1, so this finding helps verify that the geometry is the same among short-lived eruptive systems.”
The team further monitored how polarization values changed during Swift J1727’s peak outburst. Those conclusions matched findings simultaneously obtained during studies of other energy bands of electromagnetic radiation.
A third and a fourth study, led by researchers Jiří Svoboda and Jakub Podgorný, both of the Czech Academy of Sciences in Prague, focused on X-ray polarization at the second part of the Swift J1727’s outburst and its return to a highly energetic state several months later. For Podgorný’s previous efforts using IXPE data and black hole simulations, he recently was awarded the Czech Republic’s top national prize for a Ph.D. thesis in the natural sciences.
The polarization data indicated that the geometry of the corona did not change significantly between the beginning and the end of the outburst, even though the system evolved in the meantime and the X-ray brightness dropped dramatically in the later energetic state.
The results represent a significant step forward in our understanding of the changing shapes and structures of accretion disk, corona, and related structures at black holes in general. The study also demonstrates IXPE’s value as a tool for determining how all these elements of the system are connected, as well as its potential to collaborate with other observatories to monitor sudden, dramatic changes in the cosmos.
“Further observations of matter near black holes in binary systems are needed, but the successful first observing campaign of Swift J1727.8–1613 in different states is the best start of a new chapter we could imagine,” said Michal Dovčiak, co-author of the series of papers and leader of the IXPE working group on stellar-mass black holes, who also conducts research at the Czech Academy of Sciences.
More about IXPE
IXPE, which continues to provide unprecedented data enabling groundbreaking discoveries about celestial objects across the universe, is a joint NASA and Italian Space Agency mission with partners and science collaborators in 12 countries. IXPE is led by NASA’s Marshall Space Flight Center in Huntsville, Alabama. Ball Aerospace, headquartered in Broomfield, Colorado, manages spacecraft operations together with the University of Colorado’s Laboratory for Atmospheric and Space Physics in Boulder.
Learn more about IXPE’s ongoing mission here:
https://www.nasa.gov/ixpe
Elizabeth Landau
NASA Headquarters
elizabeth.r.landau@nasa.gov
202-358-0845
Lane Figueroa
NASA’s Marshall Space Flight Center
256-544-0034
lane.e.figueroa@nasa.gov
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Last Updated Dec 06, 2024 Related Terms
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Last Monday, paraglider Alex Lang was flying high above the Great Pyramid of Giza when he noticed unexpected movement at its peak. To his surprise, it wasn't a person, but a dog perched at the top of the ancient monument.
Image credit: Alex Lang.
Lang, who recorded the bizarre sighting, described the dog barking and chasing birds from the very summit of the pyramid.
The footage left people both fascinated and confused, wondering how the dog had managed to scale such an immense structure. Some even joked that it might be a manifestation of Anubis, god of funerary practices and care of the dead. However, the main concern was whether the dog could safely make its way back down.
Luckily, a few days later, the dog was captured on video making its way down the ancient landmark, appearing calm and unscathed, as if the climb had been no big deal.
Image credit: abcnews.
Link video dog making its way down.https://www.tiktok.com/@abcnews/video/7427042186371386654/View the full article
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By NASA
7 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Jhony Zavaleta, ASIA-AQ Project Manager, welcomes DC-8 Navigator Walter Klein and the rest of the aircraft crew to U-Tapao, Thailand for its initial arrival to the country during the ASIA-AQ campaign. Erin Czech (back, blue shirt) and Jaden Ta (front, black pants) served as part of the Thailand ESPO site management team, while Zavaleta and Sam Kim (far right) worked as the ESPO advance team to prepare each new site for the mission’s arrival. NASA Ames/Rafael Luis Méndez Peña ESPO solves problems before you know you have them. If you are missing a canister of liquid nitrogen, got locked out of your rental car, or need clearance for a South Korean military base, you want ESPO in your corner.
What is ESPO?
While the Earth Science Project Office (ESPO) does many things, one of the team’s primary responsibilities is providing project management for many of the largest and most complex airborne campaigns across NASA’s Earth Science Division.
Some of these missions are domestic, such as the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE). S-MODE deployed three separate field campaigns from 2021-2023, using planes, drones, marine robotics, and research vessels to study ocean eddies and sub-surface dynamics. NASA Ames Research Center, located in Northern California, served as S-MODE’s control center and the base for two of the three deployed aircraft.
Erin Czech (far left) stands with Jacob Soboroff and the Today Show crew, members of the NASA Ames Public Affairs Office, researchers from the Jet Propulsion Laboratory (JPL), and the NASA Langley G-III air crew during S-MODE’s 2023 deployment. Courtesy of Jacob Soboroff
ESPO also provides project management for many international missions, such as the Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ), which deployed in January, 2024 out of South Korea, Thailand, and the Philippines. The campaign used satellites, aircraft, and ground-based sensors to study air quality across Asia, as part of a global effort to better understand the factors that contribute to air quality.
Despite the critical nature of ESPO’s work, they’ll be the first to tell you that their goal is to remain behind the scenes. “Our mission statement is essentially to let the scientists concentrate on science,” said Erin Czech, Assistant Branch Chief of ESPO. “Our team’s job is to stay in the background. We don’t really advertise all the things we do, the pieces we put together, the crises we solve, because we don’t want folks to have to be in the weeds with us. We’ll take care of it.”
Making the invisible, visible: What does this look like in practice?
Before a deployment:
Project management for major airborne campaigns begins long before a deployment. The team begins by helping establish a mission framework, such as getting a budget in place, settling grants and funding with partner universities and agencies, and performing site visits.
“We are not scientists,” Czech said, “it’s the job of the Principal Investigator to mission plan. Our job is to evaluate risk, set up contingency plans, and help make sure all the different groups are talking to each other. We work with world-class scientists, who are going to come up with an awesome plan; we just want to do whatever we need to in order to support them.”
We work with world-class scientists, who are going to come up with an awesome plan; we just want to do whatever we need to in order to support them.
Erin Czech
ESPO Assistant Branch Chief
As the deployment date draws closer, the team nails down logistics: deciding how and where to ship equipment, reserving hotel blocks for researchers, acquiring diplomatic clearances, running planning meetings between agencies, and so much more.
This process is particularly complicated for multi-site, international missions like ASIA-AQ, which required multiple visits to each country before the actual deployment. “We looked at many locations in each country on the first scouting trip, to help figure out deployment sites,” said Jhony Zavaleta, Deputy Director for ESPO and Project Manager for ASIA-AQ. “The second scouting trip was to evaluate modifications promised during the first trip, such as upgrades to infrastructure, and to figure out hotels, transit options, specific facilities for mission operations, that sort of thing.”
According to Zavaleta, another purpose of these advance trips was to put pieces in place with partner organizations – such as civilian aviation authorities, foreign science ministries, or military operations – so that when NASA officially requested diplomatic clearance to run the airborne campaigns, the groundwork had already been laid.
Then it’s go time.
During the deployment:
As the deployment gets underway, ESPO keeps the flurry of activity running as smoothly as possible.
“During a deployment, you’re working all day every day,” said Czech, who is also the Project Manager for S-MODE. “But really that’s the whole mission team. When you’re on a NASA project, the whole team is incredibly dedicated and working like crazy, because everybody’s on the same page to make the most out of this investment, and take advantage of any kind of science opportunity that presents itself day to day.”
For Zavaleta, day-to-day operations meant escorting personnel onto military bases, tracking down liquid nitrogen, coordinating media days with local news outlets, setting up satellite communications, arranging transportation between sites, and preparing the next location. “I was on the ESPO advance team, which would set up one location, overlap with the ESPO site management team for about a week, then head to the next,” Zavaleta recalled. “Our teams would leapfrog; we were always managing site logistics, but also always preparing and setting up for the next spot.”
(From left) Stevie Phothisane, Vidal Salazar, and Daisy Gonzalez, the ESPO site management team for the Philippines during ASIA-AQ, sit at Clark International Airport coordinating daily operations support while the aircraft was in flight.NASA Ames/Rafael Luis Méndez Peña
Beyond the day-to-day operations, ESPO also steps in when major issues arise. According to Czech, they can usually expect one or two big wrenches to come up for any major mission.
For S-MODE, the first wrench came in the form of a global pandemic. “The original deployment was set for April, 2020,” Czech said. “Everything was shutting down, and we had just set everything up: ship, aircraft, everything. In fact, we set everything up two more times before we ultimately got to do our first deployment, in October of 2021.”
The second major wrench happened when four months before the actual launch, the research vessel the mission was planned around backed out. From there, Czech said it was a mad scramble to find a suitable replacement vessel that was already on the West Coast, and to build out the on-board infrastructure to meet the mission requirements.
The R/V (Research Vessel) Oceanus sits docked in Newport, Oregon during S-MODE ship mobilization. The Oceanus was one of three research vessels that deployed throughout the mission. NASA Ames/Sommer Nicholas
“The key is just to always be on the lookout for issues, keep agile, and don’t get too frustrated if things don’t go your way,” Czech said. “It is what it is. Some major issue comes up on every big mission: you’ve just got to figure out how to deal with it, then move on.”
After the deployment:
After a field deployment is finished, there are still years of work to do – for the scientists and for ESPO.
The final S-MODE field deployment concluded in Spring of 2023. While the science team has been processing data and analyzing results, ESPO’s role has been to organize annual science team meetings, track publications tied to the mission, and help compile a final report to be presented in Washington DC when the mission officially wraps in May of 2025.
Researchers Kayli Matsuyoshi, Luke Colosi and Luc Lenain in the Air-Sea Interaction Laboratory at SIO discussing the latest S-MODE findings. Courtesy of Nick Pizzo For ASIA-AQ, whose deployment wrapped up in March of 2024, ESPO’s first task was getting all equipment and personnel back to their respective home bases. Next up, Zavaleta and his team are coordinating a science team meeting in Malaysia in January of 2025, and supporting the scientists as they put together a preliminary research report for later that spring.
Knowledge and Expertise
While logistical skills and communication brokering are important pieces of ESPO’s role, knowledge may be the group’s most important asset. “In many ways, our value to NASA lies in the fact that we’ve been doing this a long time,” Czech said. “Our first mission was in 1987, and we’ve run over 60 campaigns since then; we have a lot of institutional knowledge that gets passed down, and a lot of experience between our team members. That expertise is a large part of our value to the agency.”
To access the data from S-MODE, visit the Physical Oceanography Distributed Active Archive Center (PO.DAAC)
About the Author
Milan Loiacono
Science Communication SpecialistMilan Loiacono is a science communication specialist for the Earth Science Division at NASA Ames Research Center.
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Last Updated Oct 18, 2024 Related Terms
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