Conveners
Session 11
- Maddie Lucey
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Jianhui Lian (REMOTE)8/3/23, 9:00 AM
The heavy element abundance profiles of galaxies place stringent constraints on galaxy growth and assembly history. Low-redshift galaxies generally have a negative metallicity gradient in their gas and stars. Such gradients are thought to be a natural manifestation of galaxy inside-out formation. As the Milky Way is currently the only spiral galaxy in which we can measure temporally-resolved...
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Keith Inight8/3/23, 9:12 AM
The study of cataclysmic variables (CVs) has historically suffered from severe selection effects – most CVs were revealed by their outbursts. SDSS spectroscopy has been transformational in identifying large numbers of CVs from their spectral lines. SDSS spectroscopy, in combination with photometric light curves enables reliable classification of CV subtypes. Following a major effort to...
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Lyra Cao8/3/23, 9:24 AM
Dark magnetic starspots are ubiquitous on the surfaces of cool stars; however, it has been difficult to directly measure magnetic signatures for large stellar samples. We recently showed that spectroscopic starspot filling fractions can be measured in bulk using a two-temperature technique on APOGEE spectra. The resultant precise starspot measurements follow other activity scalings with Rossby...
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Jamie Tayer8/3/23, 9:36 AM
The abundances of mixing sensitive elements are known to change near the red giant branch bump in metal-poor stars, something often known as “extra mixing”. The leading explanation for these changes has been the triggering of the double-diffusive thermohaline instability, but that theory makes specific predictions about the timing and trends of the mixing. With currently available...
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Dejene Zewdie Woldeyes