Pinned
Keaton Bell
@astrokeat.bsky.social
· Feb 23
White Dwarf Variability
There are a few different mechanisms that can cause white dwarf stars to vary in brightness, providing opportunities to probe the physics, structures, and formation of these compact stellar remnants. ...
arxiv.org
Preprint of a chapter "White Dwarf Variability" that will appear in the forthcoming Encyclopedia of Astrophysics: arxiv.org/abs/2502.13258
My Python environment.
August 22, 2025 at 2:25 PM
My Python environment.
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
July 30, 2025 at 1:04 PM
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
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
July 9, 2025 at 12:51 PM
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
Reposted by Keaton Bell
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
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
June 23, 2025 at 3:46 PM
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
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
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/.
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).
June 9, 2025 at 8:26 PM
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/.
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
#stellarastro
aas (iPosterSessions - an aMuze! Interactive system)
aas246-aas.ipostersessions.com
June 9, 2025 at 8:21 PM
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
#stellarastro
Check out the #AAS246 iPoster "TESS CROWDSAP Errors from White Dwarf Observations" from Nikoo Hosseininezhad and myself: aas246-aas.ipostersessions.com/default.aspx...
#stellarastro
#stellarastro
aas (iPosterSessions - an aMuze! Interactive system)
aas246-aas.ipostersessions.com
June 9, 2025 at 8:20 PM
Check out the #AAS246 iPoster "TESS CROWDSAP Errors from White Dwarf Observations" from Nikoo Hosseininezhad and myself: aas246-aas.ipostersessions.com/default.aspx...
#stellarastro
#stellarastro
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).
June 9, 2025 at 7:52 PM
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).
Reposted by Keaton Bell
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
May 31, 2025 at 11:29 PM
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
Reposted by Keaton Bell
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!
May 29, 2025 at 5:06 PM
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!
Reposted by Keaton Bell
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...
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...
May 8, 2025 at 4:27 PM
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...
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...
Reposted by Keaton Bell
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...
www.gc.cuny.edu/news/phd-nex...
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.
www.gc.cuny.edu
September 19, 2024 at 11:49 AM
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...
www.gc.cuny.edu/news/phd-nex...
Looks like this is the real deal, folks. Very exciting! First confirmed intact planet transiting a white dwarf star!
Thermal Emission and Confirmation of the Frigid White Dwarf Exoplanet WD 1856+534b
https://arxiv.org/pdf/2504.16982
Mary Anne Limbach et al.
https://arxiv.org/pdf/2504.16982
Mary Anne Limbach et al.
https://arxiv.org/abs/2504.16982
arXiv abstract link
arxiv.org
April 25, 2025 at 4:56 PM
Looks like this is the real deal, folks. Very exciting! First confirmed intact planet transiting a white dwarf star!
This was a transformative meeting for me as a senior graduate student. I met many wonderful collaborators and mentors here.
Hot-wiring the Transient Universe 5 was the final one in the original poster series. I had left NOAO by the time of the meeting in 2016, and NOAO was soon descoped & reorganized. The 5th workshop was the first organized by a university department, a model that continues.
(see comments)
#PlanetSci
(see comments)
#PlanetSci
April 1, 2025 at 4:43 PM
This was a transformative meeting for me as a senior graduate student. I met many wonderful collaborators and mentors here.
Reposted by Keaton Bell
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
Application deadline is April 15, 2025. 💫
#CUNY #cuny #cunygc #amnh #astrophysics #astro
@thegraduatecenter.bsky.social @natural-history.bsky.social
April 1, 2025 at 2:36 PM
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
Application deadline is April 15, 2025. 💫
#CUNY #cuny #cunygc #amnh #astrophysics #astro
@thegraduatecenter.bsky.social @natural-history.bsky.social
Stand Up For Science!
March 8, 2025 at 12:18 AM
Stand Up For Science!
Had a great time at Cosmic Pathways today representing Queens College Physics. Thanks for organizing this fantastic event @wrightphyshop.bsky.social !
March 1, 2025 at 11:37 PM
Had a great time at Cosmic Pathways today representing Queens College Physics. Thanks for organizing this fantastic event @wrightphyshop.bsky.social !
NYC local rally will be in Washington Square Park from 12-3 PM.
March 1, 2025 at 12:00 AM
NYC local rally will be in Washington Square Park from 12-3 PM.
Reposted by Keaton Bell
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
Register @ tinyurl.astroopenhouse25
#CUNY #cuny #cunygc #amnh #astrophysics #astro
@thegraduatecenter.bsky.social
February 25, 2025 at 6:32 PM
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
Register @ tinyurl.astroopenhouse25
#CUNY #cuny #cunygc #amnh #astrophysics #astro
@thegraduatecenter.bsky.social
Preprint of a chapter "White Dwarf Variability" that will appear in the forthcoming Encyclopedia of Astrophysics: arxiv.org/abs/2502.13258
White Dwarf Variability
There are a few different mechanisms that can cause white dwarf stars to vary in brightness, providing opportunities to probe the physics, structures, and formation of these compact stellar remnants. ...
arxiv.org
February 23, 2025 at 3:24 PM
Preprint of a chapter "White Dwarf Variability" that will appear in the forthcoming Encyclopedia of Astrophysics: arxiv.org/abs/2502.13258
A nice break from the usual work week at the one-day ExoNYC local exoplanets meeting today at the Flatiron Institute/CCA.
February 10, 2025 at 7:11 PM
A nice break from the usual work week at the one-day ExoNYC local exoplanets meeting today at the Flatiron Institute/CCA.
Reposted by Keaton Bell
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.
🔭
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.
AAS Journal Author Series: Agnès Bischoff-Kim on 2024ApJ...970...27B
YouTube video by AAS
youtu.be
August 28, 2024 at 3:33 PM
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.
🔭
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.
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 👋
January 6, 2025 at 9:20 PM
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 👋