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#TESS

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HistoPol (#HP)

@admin


Wäre dieses -Projekt nicht etwas für dich und deine Schülis?

(Natürlich nur mit TOR und Pseudonymen und z. B. Schweizer Mailkonten ;))

hachyderm.io/@BenjaminHCCarr/1

@BenjaminHCCarr

Hachyderm.ioBenjamin Carr, Ph.D. 👨🏻‍💻🧬 (@BenjaminHCCarr@hachyderm.io)#CitizenScientists pinpoint 10,000 eclipsing #star pairs #NASA is still looking for #volunteer stargazers to help with the #astronomy effort #Ctizenscience project in question, the #EclipsingBinaryPatrol, validates images from NASA's Transiting Exoplanet Survey Satellite (TESS) mission. Researchers identified 1.2 million potential eclipsing star pairs. Citizen scientists validated a subset of about 60,000... manually inspecting 100,000s of images. https://www.washingtonpost.com/science/2025/07/06/citizen-scientist-binary-stars-astronomy/ https://archive.ph/NwV7b
Loki the Cat

Citizen Scientists Just Helped Discover Nearly 8,000 New Eclipsing Binary Stars!

AI spotted 1.2M potential stellar couples, but humans had to play cosmic matchmaker and manually verify which ones were actually together. The result? 7,936 brand new binary systems! Next up: hunting for exoplanets around these stellar pairs.

science.slashdot.org/story/25/

science.slashdot.orgCitizen Scientists Just Helped Discover Nearly 8,000 New Eclipsing Binary Stars - Slashdot"Citizen scientists have successfully located thousands of previously unknown pairs of 'eclipsing binary' stars," reports the Washington Post, citing a recent announcement from NASA. The ongoing initiative helps space researchers hunt for "eclipsing binary" stars, a rare phenomenon in which two st...
#CitizenScience#NASA#TESS
michael

2-Jul-2025
Clingy planets can trigger own doom, suspect and

"planet with a death wish" seems to be triggering flares of radiation from the star it orbits. These tremendous explosions are blasting away the planet’s wispy atmosphere, causing it to shrink every year.
Though it was theorised to be possible since the 90s, the flares seen in this research are around 100 times more energetic than expected.
eurekalert.org/news-releases/1

EurekAlert!Clingy planets can trigger own doom, suspect Cheops and TESSAstronomers using the European Space Agency’s Cheops mission have caught an exoplanet that seems to be triggering flares of radiation from the star it orbits. These tremendous explosions are blasting away the planet’s wispy atmosphere, causing it to shrink every year. This is the first-ever evidence for a ‘planet with a death wish’. Though it was theorised to be possible since the nineties, the flares seen in this research are around 100 times more energetic than expected.
Mikko Tuomi

First first-author paper by my PhD researcher Andras Haris. Not formally accepted yet, but major hurdles cleared.

He has analysed 3273 space telescope light curves of 99 , and identified 105 candidates for occultation events by six planets.

Homogeneous search for spot transits in and photometry of K − M-type main-sequence


arxiv.org/abs/2502.18129

arXiv.orgHomogeneous search for spot transits in Kepler and TESS photometry of K $-$ M-type main-sequence starsLate-type stars are known to host numerous exoplanets, and their photometric variability, primarily caused by rotational modulation, provides a unique opportunity to study starspots. As exoplanets transit in front of their host stars, they may occult darker, spotted regions on the stellar surfaces. The monitoring of starspots from planetary transits, known as transit mapping, offers a possibility to detect small dark regions on magnetically active, late-type stars. These spots may be so small that they would be undetectable to other methods used to reconstruct stellar magnetic activity. We describe a Bayesian analysis framework on the transit light curves of planets orbiting K- and M-type main-sequence stars in search for spot occultation event candidates. We present a systematic analysis of high-precision, high-cadence light curves from Kepler and TESS to detect and characterise starspots during exoplanetary transits. According to our tests, the set of criteria applied in the analysis is robust and not prone to false positives. Our sample comprises K- and M-dwarfs hosting transiting exoplanets observed by the Kepler or TESS space telescopes at a high cadence, totalling 99 planets meeting our selection criteria. After analysing 3273 transit light curves from 99 planets, we find 105 candidates for starspot occultation events by six planets. We report new spot occultation candidates for the K-dwarfs HD 189733 and TOI-1268. The identified dark regions have a lower limit for radii between 1.6 degrees and 29.5 degrees and contrasts up to 0.69. We estimate a spot detection frequency of 3.7% and 4.2% for K- and M-dwarfs by TESS, and 37.5% for K-dwarfs by Kepler.
Mikko Tuomi

Transiting Survey Satellite is not only good at detecting .

Here are 11 new transiting brown dwarfs and very low-mass from consisting of 5 brown dwarf companions and 6 very low mass stellar companions ranging in mass from 25 to 128 Jupiter masses.

The distribution for the transiting brown dwarf sample does not support previous claims of a transition between planetary and stellar formation at ∼42 Jupiter masses.

astrobiology.com/2025/01/11-ne

Astrobiology · 11 New Transiting Brown Dwarfs and Very Low Mass Stars from TESS - AstrobiologyWe present the discovery of 11 new transiting brown dwarfs and low-mass M-dwarfs from NASA’s TESS mission: TOI-2844, TOI-3122, TOI-3577, TOI-3755, TOI-4462, TOI-4635, TOI-4737, TOI-4759, TOI-5240, TOI-5467, and TOI-5882. They consist of 5 brown dwarf companions and 6 very low mass stellar companions ranging in mass from 25MJ to 128MJ. We used a combination of […]
Martin Owens :inkscape:

This took a *long* time to get to me. It was hanging out at MIT during Covid and finally someone mailed it to me this year as the lab was being closed up.

It was a fun project to work on, though I wasn't critical. Best I can say is; "I hope I helped" But I'm also chuffed to bits to have it.

#TESS#NASA#Space
Hugh Osborn

It's always interesting to see insights into how run. For example, at the recent meeting, the onboard software folks were experimenting with getting higher compression rates for data... by installing gzip on the onboard processor. I guess if something works well, don't overcomplicate it!

michael

13-JUN-2024
Mysterious mini-Neptunes

This study discovered mini-Neptunes around four red dwarfs using observations from a global network of ground-based telescopes and the space telescope. These four mini-Neptunes are close to their parent stars, and the three of them are likely to be in eccentric orbits.

eurekalert.org/news-releases/1

EurekAlert!Mysterious mini-NeptunesThis study discovered mini-Neptunes around four red dwarfs using observations from a global network of ground-based telescopes and the TESS space telescope. These four mini-Neptunes are close to their parent stars, and the three of them are likely to be in eccentric orbits.
#science#astrobiology#exoplanets
Daniel Fischer

Gliese 12 b, a temperate Earth-sized planet at 12 parsecs discovered with and / Gliese 12 b - A Temperate Earth-sized at 12 pc Ideal for Atmospheric Transmission Spectroscopy: academic.oup.com/mnras/article / iopscience.iop.org/article/10. -> Rare 'exo-Venus' with Earth-like temperature discovered / NASA’s TESS Finds Intriguing World Sized Between Earth, Venus: ras.ac.uk/news-and-press/news/ / science.nasa.gov/universe/exop

OUP AcademicGliese 12 b, a temperate Earth-sized planet at 12 parsecs discovered with TESS and CHEOPSABSTRACT. We report on the discovery of Gliese 12 b, the nearest transiting temperate, Earth-sized planet found to date. Gliese 12 is a bright (V = 12.6 ma
Daniel Fischer

NASA’s (Transiting Exoplanet Survey Satellite) returned to science operations May 3 and is once again making observations: science.nasa.gov/missions/tess - the satellite went into safe mode April 23 following a separate period of down time earlier that month.

science.nasa.govNASA’s Planet-Hunting Satellite Temporarily on Pause - NASA ScienceDuring a routine activity April 23, NASA’s TESS (Transiting Exoplanet Survey Satellite) entered safe mode, temporarily suspending science operations. The satellite scans the sky searching for planets beyond our solar system. The team is working to restore the satellite to science operations while investigating the underlying cause. NASA also continues investigating the cause of a […]
Daniel Fischer

Searching for Free-Floating Planets with - Discovery of a First Terrestrial-Mass Candidate: arxiv.org/abs/2404.11666 -> TESS Finds its First Rogue Planet: universetoday.com/166755/tess-

arXiv.orgSearching for Free-Floating Planets with TESS: I. Discovery of a First Terrestrial-Mass CandidateThough free-floating planets (FFPs) that have been ejected from their natal star systems may outpopulate their bound counterparts in the terrestrial-mass range, they remain one of the least explored exoplanet demographics. Due to their negligible electromagnetic emission at all wavelengths, the only observational technique able to detect these worlds is gravitational microlensing. Microlensing by terrestrial-mass FFPs induces rare, short-duration magnifications of background stars, requiring high-cadence, wide-field surveys to detect these events. The Transiting Exoplanet Survey Satellite (TESS), though designed to detect close-bound exoplanets via the transit technique, boasts a cadence as short as 200 seconds and has monitored hundreds of millions of stars, making it well-suited to search for short-duration microlensing events as well. We have used existing data products from the TESS Quick-Look Pipeline (QLP) to perform a preliminary search for FFP microlensing candidates in 1.3 million light curves from TESS Sector 61. We find one compelling candidate associated with TIC-107150013, a source star at $d_s = 3.194$ kpc. The event has a duration $t_E = 0.074^{+0.002}_{-0.002}$ days and shows prominent finite-source features ($ρ= 4.55^{+0.08}_{-0.07}$), making it consistent with an FFP in the terrestrial-mass range. This exciting result indicates that our ongoing search through all TESS sectors has the opportunity to shed new light on this enigmatic population of worlds.
Hugh Osborn

Oof. Second safe mode in two orbits for TESS... Fingers crossed this doesn't mean there's any deeper issue. I also hope on-board storage is enough to store both of the recent datasets.
has been transformational for detection of small transiting planets around bright stars so fingers crossed the teams at NASA and MIT get it back on sky soon

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