Discovery of a Weak CN Spectral Absorption Feature in Red Supergiant Stars in the Andromeda (M31) and Triangulum (M33) Galaxies

Discovery of a Weak CN Spectral Absorption Feature in Red Supergiant Stars in the Andromeda (M31) and Triangulum (M33) Galaxies

Using Keck DEIMOS spectra of stars in the Andromeda (M31) and Triangulum (M33) galaxies, selected from the large multiband (near-ultraviolet, visible light, and near-infrared) Hubble Space Telescope surveys PHAT and PHATTER, respectively, we have identified a subset of stars that contain a previousl...

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Main Authors: Puragra Guhathakurta, Douglas Grion Filho, Antara R. Bhattacharya, Lara R. Cullinane, Julianne J. Dalcanton, Karoline M. Gilbert, Leo Girardi, Anika Kamath, Evan N. Kirby, Arya Maheshwari, Paola Marigo, Alexandra Masegian, Amanda C. N. Quirk, Rachel Raikar, Stanley M. Rinehart V, Caelum J. Rodriguez, Benjamin F. Williams
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal
Subjects:
Carbon stars
CN stars
Stellar evolution
Andromeda galaxy
Triangulum Galaxy
Online Access:https://doi.org/10.3847/1538-4357/adcc2c
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https://doi.org/10.3847/1538-4357/adcc2c

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