The G305 Star-forming Region. I. Newly Classified Hot Stars
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Fecha
2019
Profesor/a Guía
Facultad/escuela
Idioma
en
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Título del volumen
Editor
Astronomical Journal
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Licencia CC
Attribution 4.0 International (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.en
https://creativecommons.org/licenses/by/4.0/deed.en
https://creativecommons.org/licenses/by/4.0/deed.en
Resumen
The relatively nearby star-forming complex G305 is one of the most luminous H ii regions in the Galaxy, and it contains several sites and epochs of star formation. Using a combination of near-infrared photometry from "Vista Variables in Via Lactea" ESO Large Public Survey, SDSS-IV APOGEE-2 spectra, and Gaia DR2 photometry and astrometry, we report on 29 OB type, Wolf-Rayet, and emission-line stars, 18 of which are newly classified. Most of these hot stars belongs to the main sequence, although some stars of class I are also proposed. The mean radial velocity is RV = -41.8 . The average spectroscopic distance is 3.2 +1.6 kpc, while the Gaia DR2 average distance is 3.7 +1.8 kpc. Eight objects show light-curve variations with amplitudes greater than 0.5 mag in the K S band. © 2019. The American Astronomical Society. All rights reserved.
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Indexación Scopus
Palabras clave
Galaxy: stellar content, infrared: stars, stars: massive, stars: variables: general, stars: Wolf Rayet
Citación
Astronomical Journal Volume 158, Issue 1 2019 Article number 46
DOI
10.3847/1538-3881/ab276b