The G305 Star-forming Region. I. Newly Classified Hot Stars

Jura Borissova; Alexandre Roman-Lopes; Kevin R. Covey; Nicolas Medina; Radostin Kurtev; Carlos Roman-Zuniga; M. A. Kuhn; Carlos Contreras Peña; Philip Lucas; Sebastian Ramirez Alegria; Dante Minniti; Marina Kounkel; Guy Stringfellow; Rodolfo H. Barbá; Genaro Suárez

doi:10.3847/1538-3881/ab276b

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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 {km} {{{s}}}^-1. 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.

Based on Vista Variables in the Vía Láctea (VVV); SDSS-IV APOGEE-2 and Gaia DR2 data.

Original language	English
Article number	46
Journal	The Astronomical Journal
Volume	158
DOIs	https://doi.org/10.3847/1538-3881/ab276b
Publication status	Published - 1 Jul 2019

Keywords

Galaxy: stellar content
infrared: stars
stars: massive
stars: Wolf–Rayet
stars: variables: general

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10.3847/1538-3881/ab276b

https://ui.adsabs.harvard.edu/abs/2019AJ....158...46B

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Borissova, J., Roman-Lopes, A., Covey, K. R., Medina, N., Kurtev, R., Roman-Zuniga, C., Kuhn, M. A., Contreras Peña, C., Lucas, P., Ramirez Alegria, S., Minniti, D., Kounkel, M., Stringfellow, G., Barbá, R. H., & Suárez, G. (2019). The G305 Star-forming Region. I. Newly Classified Hot Stars. The Astronomical Journal, 158, Article 46. https://doi.org/10.3847/1538-3881/ab276b

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abstract = "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 \{km\} \{\{\{s\}\}\}-1. 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. Based on Vista Variables in the V{\'i}a L{\'a}ctea (VVV); SDSS-IV APOGEE-2 and Gaia DR2 data.",

keywords = "Galaxy: stellar content, infrared: stars, stars: massive, stars: Wolf–Rayet, stars: variables: general",

author = "Jura Borissova and Alexandre Roman-Lopes and Covey, \{Kevin R.\} and Nicolas Medina and Radostin Kurtev and Carlos Roman-Zuniga and Kuhn, \{M. A.\} and \{Contreras Pe{\~n}a\}, Carlos and Philip Lucas and \{Ramirez Alegria\}, Sebastian and Dante Minniti and Marina Kounkel and Guy Stringfellow and Barb{\'a}, \{Rodolfo H.\} and Genaro Su{\'a}rez",

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doi = "10.3847/1538-3881/ab276b",

language = "English",

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journal = "The Astronomical Journal",

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T1 - The G305 Star-forming Region. I. Newly Classified Hot Stars

AU - Borissova, Jura

AU - Roman-Lopes, Alexandre

AU - Covey, Kevin R.

AU - Medina, Nicolas

AU - Kurtev, Radostin

AU - Roman-Zuniga, Carlos

AU - Kuhn, M. A.

AU - Contreras Peña, Carlos

AU - Lucas, Philip

AU - Ramirez Alegria, Sebastian

AU - Minniti, Dante

AU - Kounkel, Marina

AU - Stringfellow, Guy

AU - Barbá, Rodolfo H.

AU - Suárez, Genaro

PY - 2019/7/1

Y1 - 2019/7/1

N2 - 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 {km} {{{s}}}-1. 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. Based on Vista Variables in the Vía Láctea (VVV); SDSS-IV APOGEE-2 and Gaia DR2 data.

AB - 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 {km} {{{s}}}-1. 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. Based on Vista Variables in the Vía Láctea (VVV); SDSS-IV APOGEE-2 and Gaia DR2 data.

KW - Galaxy: stellar content

KW - infrared: stars

KW - stars: massive

KW - stars: Wolf–Rayet

KW - stars: variables: general

U2 - 10.3847/1538-3881/ab276b

DO - 10.3847/1538-3881/ab276b

M3 - Article

SN - 0004-6256

VL - 158

JO - The Astronomical Journal

JF - The Astronomical Journal

M1 - 46

ER -

The G305 Star-forming Region. I. Newly Classified Hot Stars

Abstract

Keywords

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