College of Letters & Science

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The College of Letters and Science, the largest center for learning, teaching and research at Montana State University, offers students an excellent liberal arts and sciences education in nearly 50 majors, 25 minors and over 25 graduate degrees within the four areas of the humanities, natural sciences, mathematics and social sciences.

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Author: search.filters.author.Borissova, JuraHas files: Yes

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    APOGEE Net: An Expanded Spectral Model of Both Low-mass and High-mass Stars
    (American Astronomical Society, 2022-04) Sprague, Dani; Culhane, Connor; Kounkel, Marina; Olney, Richard; Covey, K. R.; Hutchinson, Brian; Lingg, Ryan; Stassun, Keivan G.; Román-Zúñiga, Carlos G.; Roman-Lopes, Alexandre; Nidever, David; Beaton, Rachael L.; Borissova, Jura; Stutz, Amelia; Stringfellow, Guy S.; Ramírez, Karla Peña; Ramírez-Preciado, Valeria; Hernández, Jesús; Kim, Jinyoung Serena; Lane, Richard R.
    We train a convolutional neural network, APOGEE Net, to predict Teff, {log}g, and, for some stars, [Fe/H], based on the APOGEE spectra. This is the first pipeline adapted for these data that is capable of estimating these parameters in a self-consistent manner not only for low-mass stars, (such as main-sequence dwarfs, pre-main-sequence stars, and red giants), but also high-mass stars with Teff in excess of 50,000 K, including hot dwarfs and blue supergiants. The catalog of ∼650,000 stars presented in this paper allows for a detailed investigation of the star-forming history of not just the Milky Way, but also of the Magellanic clouds, as different type of objects tracing different parts of these galaxies can be more cleanly selected through their distinct placement in Teff, {log}g parameter space than in previous APOGEE catalogs produced through different pipelines.
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