Close companions around young stars

Autor: Penélope Longa-Peña, Adam L. Kraus, Benjamin M. Tofflemire, Maxwell Moe, Cody Brown, Audrey Oravetz, Kaike Pan, J. Borissova, Daniel Oravetz, Nathan De Lee, Keivan G. Stassun, Guy S. Stringfellow, Kevin R. Covey, Yilen Gómez Maqueo Chew, Karla Peña Ramírez, Jesús Hernández, Rodolfo H. Barbá, Daniel M. Krolikowski, Dmitry Bizyaev, Carlos Román-Zúñiga, Alexandre Roman-Lopes, David L. Nidever, Aaron C. Rizzuto, Genaro Suárez, Carles Badenes, Karl O. Jaehnig, Jinyoung Serena Kim, Kaitlin M. Kratter, Marina Kounkel
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Popis: Multiplicity is a fundamental property that is set early during stellar lifetimes, and it is a stringent probe of the physics of star formation. The distribution of close companions around young stars is still poorly constrained by observations. We present an analysis of stellar multiplicity derived from APOGEE-2 spectra obtained in targeted observations of nearby star-forming regions. This is the largest homogeneously observed sample of high-resolution spectra of young stars. We developed an autonomous method to identify double lined spectroscopic binaries (SB2s). Out of 5007 sources spanning the mass range of $\sim$0.05--1.5 \msun, we find 399 binaries, including both RV variables and SB2s. The mass ratio distribution of SB2s is consistent with a uniform for $q0.95$. The period distribution is consistent with what has been observed in close binaries ($
25 pages, 20 figures. Accepted to AJ
Databáze: OpenAIRE
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