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Discovery and characterization of 3000+ main-sequence binaries from APOGEE spectra

El-Badry, Kareem; Ting, Yuan; Rix, Hans-Walter; Quataert, Elliot; Weisz, Daniel R; Cargile, Phillip A.; Conroy, Charlie; Hogg, David W.; Bergemann, Maria; Liu, Chao

Description

We develop a data-driven spectral model for identifying and characterizing spatially unresolved multiple-star systems and apply it to APOGEE DR13 spectra of main-sequence stars. Binaries and triples are identified as targets whose spectra can be significantly better fit by a superposition of two or three model spectra, drawn from the same isochrone, than any single-star model. From an initial sample of ∼20 000 main-sequence targets, we identify ∼2500 binaries in which both the primary and...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
URI: http://hdl.handle.net/1885/159340
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/sty240

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