๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€

๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€

@afeinstein20.bsky.social

asst prof | astronomy PhD | MSU | https://adina.feinste.in

3.6K followers326 following433 posts

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hi new followers ๐Ÿ‘‹ quick intro - I'm Adina, currently a NASA Sagan fellow at Michigan State, but I'll be starting as an assistant prof here next year ๐Ÿ‘ฉ๐Ÿปโ€๐Ÿซ my research focuses on observing very young planets and stars ๐ŸŒŸ๐Ÿช๐Ÿ”ญ I'm a crafter ๐Ÿงถ, baker ๐Ÿฅง, cat-mom ๐Ÿฑ, and Halloween enthusiast ๐ŸŽƒ๐Ÿ‘ป ๐Ÿงช

๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€ reposted

โ€œWeโ€™ve established that the observatory is fully functional,โ€ said Julie McEnery, #NASARoman senior project scientist at NASAโ€™s Goddard Space Flight Center. โ€œThe telescope can guide and take exposures, data flows appropriately, and we can slew from one place to another for observations.โ€ ๐Ÿ”ญ

science.nasa.govNASAโ€™s Roman Space Telescope Enters Final Commissioning Phase - NASA ScienceNASAโ€™s Nancy Grace Roman Space Telescope mission has now entered the science commissioning phase, having successfully completed a comprehensive checkout and

I would like to see a new feature on arXiv that labels preprints that use AI upfront, since apparently TWO slop papers were successfully uploaded to the preprint server over the last two nights... arxiv.org/abs/2610.26056 ๐Ÿ”ญ๐ŸŒŸ๐Ÿช

arxiv.orgA 36.34-day Sub-Neptune Candidate Transiting the Nearby K Dwarf TIC 402710280We report a transiting sub-Neptune candidate with a period of 36.34 days around TIC 402710280 (TYC 9041-03677-1), a K dwarf of TESS magnitude 9.24 at 66.8 pc that the Transiting Exoplanet Survey Satel...

interestingggg.... paper on the arXiv tonight of a new planet candidate found with and written up entirely by AI, including the caveat, "The author has not independently checked the analyses and does not have the expertise to verify every technical detail." arxiv.org/abs/2610.28575

๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€ reposted

Important for #astrosky: Overleaf seems to upgraded to TeXLive v2026 in the past few days, and as a result, your aastex v7 / aasjournal v7.1 might be broken. To fix it, go to Overleaf's File > Settings > Compiler > TeX Live version > [select 2025] www.overleaf.com/blog/tex-liv...

John F Wu@jwuphysics.bsky.social

Is it just me or did Overleaf suddenly break all aastex/bibtex?

We're back with Part II - A detailed analysis of the starspots on the young solar analog V1298 Tau as viewed with JWST @jwstobserver.bsky.social and LCO led by MSU postdoc Matthew Murphy ๐ŸŒŸ #stellarastro check out the manuscript here ๐Ÿ‘‰ arxiv.org/abs/2606.16782 ๐Ÿ‘ˆ and the big takeaways below!

This is all cool because planets are cool, but what about the spots? Well... Stay tuned for a follow-up paper in the next few weeks where we fully characterize the spots on this young solar analog to see how they differ from the Sun ๐Ÿ‘€๐ŸŒŸ

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we combine the JWST observations with contemporaneous g' and r' band observations from the Las Cumbres Observatory, giving us a global view of V1298 Tau by fixing the spots along the transit chords and fitting the light curve, we achieve a global view of the spots on this young solar analog!

for the first time, we find the temperature and the umbral-to-penumbral area ratio of the spots on V1298 Tau are consistent with solar, although the number of spots is VERY different! our work highlights how exoplanet transits can probe stellar photospheric properties ๐Ÿ” similar to Murray+2026!

We're back with Part II - A detailed analysis of the starspots on the young solar analog V1298 Tau as viewed with JWST @jwstobserver.bsky.social and LCO led by MSU postdoc Matthew Murphy ๐ŸŒŸ #stellarastro check out the manuscript here ๐Ÿ‘‰ arxiv.org/abs/2606.16782 ๐Ÿ‘ˆ and the big takeaways below!

This is all cool because planets are cool, but what about the spots? Well... Stay tuned for a follow-up paper in the next few weeks where we fully characterize the spots on this young solar analog to see how they differ from the Sun ๐Ÿ‘€๐ŸŒŸ

We observed transits of V1298 Tau cdb and found... a lot of spots. like so many spots. Using fleck, we find the transits are best-fit by ~6 spots per transit chord by measuring the change in spot amplitude as a function of wavelength, we measure the umbral and penumbral temperatures of the spots!

๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€ reposted

btw did I mention all of the data behind the figures in the manuscript are publicly available? ๐Ÿ‘€ github.com/kronos-jwst/...

github.comGitHub - kronos-jwst/KRONOS-I-V1298-Tau-c-NIRISS: Repository for KRONOS I: The 1-2.8um Transmission Spectrum of the 23 Myr V1298 Tau cRepository for KRONOS I: The 1-2.8um Transmission Spectrum of the 23 Myr V1298 Tau c - kronos-jwst/KRONOS-I-V1298-Tau-c-NIRISS

after a wild ride, I am so so so excited to have the first paper of our JWST KRONOS program out! "KRONOS I: The 1โˆ’2.8ยตm JWST Transmission Spectrum of the 23 Myr V1298 Tau c" led by MSU postdoc Matthew Murphy ๐Ÿ‘‰ arxiv.org/abs/2606.03740 ๐Ÿ‘ˆ (short summary thread below) #stellarastro #planetsci ๐Ÿงช

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We observed a single JWST NIRISS/SOSS transit of V1298 Tau c. During its transit, we identified SIX (!) starspot crossing events!! We tried to fit the transit using different frameworks to account for the spot crossings (masked, gaussians, fleck, or gp). Regardless of how the spots were fit...

๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€ reposted

Michigan State's Darryl Seligman discusses how interstellar interlopers and dark comets are challenging our understanding of the behavior and properties of comets and asteroids. Today's lecture is part of the weekly 2026 Spring Colloquium talks at STScI.

๐Ÿ’€Adina Feinstein PhD ๐Ÿ’€ reposted

Welcome to the new fellows selected to pursue their research in space science at ESA! Their projects span a broad range of topics from investigating the nature of dark matter to learning how Jupiterโ€™s atmosphere works. Discover more about them ๐Ÿ‘‰ www.esa.int/ESA_Multimed... ๐Ÿ”ญ ๐Ÿงช โ˜„๏ธ