iiinova — where your digital self keeps evolving

Keaton Bell @astrokeat.bsky.social · 11/09/2026

New paper led by @thegraduatecenter.bsky.social Physics PhD student Andrew Dublin demonstrating five important strategies for characterizing results of fitting grids of asteroseismic models to measurements of white dwarf pulsation periods. ui.adsabs.harvard.edu/abs/2026arXi... #stellarastro

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Keaton Bell @astrokeat.bsky.social · 11/09/2026

New paper out from me an my colleague Agnes Bischoff-Kim "A Seismic Technique for Obtaining White Dwarf Fundamental Parameters from Mean Period Spacings and Astrometry"! ui.adsabs.harvard.edu/abs/2026arXi... #stellarastro

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Keaton Bell @astrokeat.bsky.social · 04/09/2026

Demonstration of beating with combs.

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Keaton Bell @astrokeat.bsky.social · 06/08/2026

Family photo of the scientific descendants of Don Winget (UT-Austin) at the European White Dwarf Workshop this week in Vienna.

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Keaton Bell @astrokeat.bsky.social · 04/08/2026

Andrew Dublin and me presenting our posters at EuroWD in Vienna this week.

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Keaton Bell @astrokeat.bsky.social · 07/07/2026

TESS data analysis led by CUNY @thegraduatecenter.bsky.social PhD student Nikoo Hosseininezhad. More to come in this series!

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Keaton Bell @astrokeat.bsky.social · 01/07/2026

The perfect birthday gift to me :)

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Keaton Bell @astrokeat.bsky.social · 26/06/2026

If you use Pyriod, try v0.4.1 that uses much less memory and can therefore handle larger data sets (like a whole year of TESS short cadence data). pypi.org/project/Pyri...

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Keaton Bell @astrokeat.bsky.social · 21/06/2026

Earl Bellinger and I vibecoded this "asteroseismology clock" as an art project/experiment with Codex. Clock hands trace ray paths of pulsations from a model of the Sun, with timescales changed to standard h:m:s clock times. #stellarastro earlbellinger.com/apps/sun-clo...

earlbellinger.com

Bellringer Sun Clock

A live asteroseismology clock where solar oscillation ray paths trace the hours, minutes, seconds, and year.

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Keaton Bell @astrokeat.bsky.social · 13/06/2026

Check out the #AAS248 @aas.org meeting iPoster "The Seismic Technique for Accurate White Dwarf Parameters" presented by Agnes Bischoff-Kim about our recently-submitted paper: aas248-aas.ipostersessions.com/Default.aspx... #stellarastro

aas248-aas.ipostersessions.com

aas (iPosterSessions - an aMuze! Interactive system)

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Keaton Bell @astrokeat.bsky.social · 13/06/2026

New #stellarastro paper with @jjhermes.bsky.social about a large outburst from the bright pulsating white dwarf star GD 1212. With fantastic data from NASA's Kepler/K2! The modeling effort was led by CUNY @thegraduatecenter.bsky.social PhD student Andrew Dublin. Read here: arxiv.org/abs/2606.09987

Mode Instability and a Massive, Isolated Outburst in the Pulsating White Dwarf GD 1212
Hermes, J. J. ; Bell, Keaton J. ; Dublin, Andrew H. ; Montgomery, M. H. ; Kawaler, Steven D. ; Clark, Ian ; Vanderbosch, Zachary P. ; Dunlap, Bart H. ; Tremblay, P.-E. ; Chote, Paul ; Gaensicke, Boris T.

The top panel shows the full 76.1-day K2 Campaign 12 light curve of GD 1212, with observations roughly every 60 s.
A large flux outburst is observed on Day 61; a zoom-in on the event is shown in the bottom panel. A sinusoidal model of the
dominant pulsation periods in roughly 4-hr windows before, during, and after the outburst are labeled on the plot in red, green,
and blue, respectively. The dominant pulsation signals in outburst have generally shorter periods and larger amplitudes, but
return roughly to quiescent behavior in less than 1 day.

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Keaton Bell @astrokeat.bsky.social · 05/06/2026

Congratulations to our graduating astrophysics Masters students!!

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Keaton Bell @astrokeat.bsky.social · 15/05/2026

27 institutions represented at the New York Area Exoplanet Meeting at AMNH today :)

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Keaton Bell @astrokeat.bsky.social · 15/03/2026

Pyriod v0.3.4 fixes a bug that made some estimates of amplitude uncertainties numerically unstable. pypi.org/project/Pyri...

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Keaton Bell @astrokeat.bsky.social · 28/02/2026

New blog post with animations demonstrating key considerations for periodogram analysis: signal-to-noise, resolution, Nyquist aliasing, and aliasing due to gaps in the data. #astromethods Read here: keatonb.github.io/archivers/ft

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Keaton Bell @astrokeat.bsky.social · 30/07/2025

RIP to Bill Paxton, lead developer of MESA. I feel privileged to have learned from the man himself at the 2012 MESA Summer School. #stellarastro #astrocode

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Keaton Bell @astrokeat.bsky.social · 09/07/2025

At the 9th TESS/16th Kepler Asteroseismic Science Consortium Workshop this week in Vienna. I'm presenting this poster on my code Pyriod for pre-whitening frequency analysis of astronomical time series data. #astromethods

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Reposted by Keaton Bell

NSF–DOE Rubin Observatory @rubinobservatory.org · 23/06/2025

Here it is: the first set of riches from Rubin's Cosmic Treasure Chest! Introducing NSF–DOE Rubin Observatory's first wide and deep view of the cosmos, the southern region of the Virgo Cluster. Rubin produced this image in just 10.5 hours over parts of 7 nights! 🔭🧪 youtu.be/Gitit3LwQ20

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Keaton Bell @astrokeat.bsky.social · 09/06/2025

I present the #astrocode Pyriod for interactive or scripted pre-whitening frequency analysis of astronomical time series data. See the demo of #stellarastro #TESS data analysis of a pulsating white dwarf star. Check it out at github.com/keatonb/Pyriod/.

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Keaton Bell @astrokeat.bsky.social · 09/06/2025

Check out the #AAS246 iPoster "White Dwarf Asteroseismology in the Age of Gaia Astrometry" from Andrew Dublin, Agnes Bischoff-Kim and myself: aas246-aas.ipostersessions.com/Default.aspx... #stellarastro

aas246-aas.ipostersessions.com

aas (iPosterSessions - an aMuze! Interactive system)

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Keaton Bell @astrokeat.bsky.social · 09/06/2025

Check out the #AAS246 iPoster "TESS CROWDSAP Errors from White Dwarf Observations" from Nikoo Hosseininezhad and myself: aas246-aas.ipostersessions.com/default.aspx... #stellarastro

aas246-aas.ipostersessions.com

aas (iPosterSessions - an aMuze! Interactive system)

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Keaton Bell @astrokeat.bsky.social · 09/06/2025

Had to withdraw my #AAS246 poster due to COVID, but let me demo "Pyriod: Interactive Pre-Whitening Frequency Analysis in Python." Here is a quick guide to reproducing the analysis of TESS data on a pulsating white dwarf from Bell et al. (2019, ui.adsabs.harvard.edu/abs/2019A%26A...632A..42B).

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Keaton Bell @astrokeat.bsky.social · 08/06/2025

Disappointed to be missing #AAS246 this week, but I gotta keep y'all safe.

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Reposted by Keaton Bell

Dr. Skylar Grayson @skylargrayson.bsky.social · 01/06/2025

Following the inspiration of @ohdearz.bsky.social @theplanetaryguy.bsky.social @jtuttlekeane.bsky.social here’s the NASA fleet with the proposed budget cuts. Red X’s will be fully defunded, green X’s will lose all NASA funding but have other funding sources, and exclamation point means >50% cuts

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Reposted by Keaton Bell

Emily McPike @astrowithemily.bsky.social · 29/05/2025

I'm coordinating a How to Read a Paper workshop for undergrads i and was wondering if people have any resources they have found helpful for outlining readings/building that skill? Any resources or advice help!

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Reposted by Keaton Bell

Mark Popinchalk @markpopinchalk.bsky.social · 08/05/2025

Astronomy is in trouble, but you can help! 🔭🧪 I made this video as part of the @aas.org #savescience week of action. Check out their resources on how you can help here aas.org/advocacy/get...

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Reposted by Keaton Bell

CUNY Graduate Center @thegraduatecenter.bsky.social · 19/09/2024

Congratulations to Andrew Ayala, who finished his master’s degree in Astrophysics and has started the Ph.D. Program in Physics at the Graduate Center! He shares advice for new students entering the world of astrophysics www.gc.cuny.edu/news/phd-nex...

gc.cuny.edu

Ph.D. Is Next Stop for an Aspiring Astrophysicist

Astrophysics graduate Andrew Ayala prepares to pursue a Ph.D. and inspire the next generation of scientists.

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Keaton Bell @astrokeat.bsky.social · 25/04/2025

Looks like this is the real deal, folks. Very exciting! First confirmed intact planet transiting a white dwarf star!

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Keaton Bell @astrokeat.bsky.social · 01/04/2025

This was a transformative meeting for me as a senior graduate student. I met many wonderful collaborators and mentors here.

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Reposted by Keaton Bell

M.S. Astrophysics CUNY @cunygc-astro.bsky.social · 01/04/2025

M.S. in Astrophysics at the CUNY Graduate Center is accepting applications for the 2025 Fall semester! Apply at www.gc.cuny.edu/astrophysics... Application deadline is April 15, 2025. 💫 #CUNY #cuny #cunygc #amnh #astrophysics #astro @thegraduatecenter.bsky.social @natural-history.bsky.social

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Keaton Bell @astrokeat.bsky.social · 23/03/2025

Are all group rate rooms gone for AAS 246 already @aas.org ?

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Keaton Bell @astrokeat.bsky.social · 01/03/2025

Had a great time at Cosmic Pathways today representing Queens College Physics. Thanks for organizing this fantastic event @wrightphyshop.bsky.social !

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Keaton Bell @astrokeat.bsky.social · 01/03/2025

NYC local rally will be in Washington Square Park from 12-3 PM.

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Reposted by Keaton Bell

M.S. Astrophysics CUNY @cunygc-astro.bsky.social · 25/02/2025

The M.S in Astrophysics Virtual Open House is on 3/20/25, 4-5pm et! We will offer program description, degree requirements, application procedure, financial support, & answer questions! Register @ tinyurl.astroopenhouse25 #CUNY #cuny #cunygc #amnh #astrophysics #astro @thegraduatecenter.bsky.social

An announcement for the CUNY Graduate Center M.S. in Astrophysics Virtual Open House with a photo of the Tarantula Nebula as a background.
March 20, 2025 from 4pm-5pm et
Register at: https//tinyurl.com/AstroOpenHouse25
Questions? Email astrophysics@gc.cuny.edu

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Keaton Bell @astrokeat.bsky.social · 10/02/2025

A nice break from the usual work week at the one-day ExoNYC local exoplanets meeting today at the Flatiron Institute/CCA.

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Reposted by Keaton Bell

Ethan Vishniac 🇺🇦🇨🇦🇺🇸 @ethan-vishniac.bsky.social · 28/08/2024

youtu.be/w8xjPGtFVSk 🔭 AAS Journal Author Series: Agnès Bischoff-Kim on 2024ApJ...970...27B Agnès Bischoff-Kim (Penn State Scranton) chats about her article on the structure of white dwarfs.

youtu.be

AAS Journal Author Series: Agnès Bischoff-Kim on 2024ApJ...970...27B

YouTube video by AAS

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Keaton Bell @astrokeat.bsky.social · 06/01/2025

Perhaps this bsky thing will take for me in a way Mastodon did not. Hoping for something like the old "astronomy Twitter" to illuminate the humanity, the fun, and the struggles behind the science. Hello world 👋

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