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Kelly Lepo
@kellylepo.bsky.social
Astronomer | Science communicator | Adult Lisa Simpson Education and Outreach Scientist at the Space Telescope Science Institute (@spacetelescope.bsky.social) supporting JWST. Personal account — Views are my own Also on Mastodon: @kellylepo@astrodon.social
1.2k followers153 following542 posts
KLkellylepo.bsky.social

Day 4 of #AAS244youtu.be/hW-zCnvkpI4

The American Astronomical Society (AAS) 244 meeting in 2 minutes and 50 seconds
The American Astronomical Society (AAS) 244 meeting in 2 minutes and 50 seconds

A walkthrough of the Monona Terrace conference center and the exhibit hall at the 244th meeting of the American Astronomical Society. This 11 minutes of foot...

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KLkellylepo.bsky.social

First session: The Powerful Shocks in Novae V: Revisiting Novae with a Multi-messenger Approach Kirill Sokolovsky: NuSTAR observations of classical novae show depleted iron (or enhanced CNO). X-ray light curves don't have periodic changes like in visible light -> X-rays are made further out #AAS244

NuSTAR lightcurves and shock location • Some variability on ~10 hour timescale • No periodic modulation (orbital/WD rotation) • No obvious correlation with optical Shocked region is large compared to the binary? Not directly related to optical - below the photosphere?
Summary • NuSTAR spectra of all detected novae look alike • Consistent with single-temperature CNO-enriched plasma • Heavily absorbed - shocks are deep within ejecta • But no fast variability, so not too close to the WD Lx/Ly <<1, defying explanation
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KL
Kelly Lepo
@kellylepo.bsky.social
Astronomer | Science communicator | Adult Lisa Simpson Education and Outreach Scientist at the Space Telescope Science Institute (@spacetelescope.bsky.social) supporting JWST. Personal account — Views are my own Also on Mastodon: @kellylepo@astrodon.social
1.2k followers153 following542 posts
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