SIMBAD references

2019ApJ...873...66R - Astrophys. J., 873, 66-66 (2019/March-1)

Massive stars in the SDSS-IV/APOGEE-2 survey. II. OB-stars in the (W345) complexes.

ROMAN-LOPES A., ROMAN-ZUNIGA C.G., TAPIA M., HERNANDEZ J., RAMIREZ-PRECIADO V., STRINGFELLOW G.S., YBARRA J.E., KIM J.S., MINNITI D., COVEY K.R., KOUNKEL M., SUAREZ G., BORISSOVA J., GARCIA-HERNANDEZ D.A., ZAMORA O. and TRUJILLO J.D.

Abstract (from CDS):

In this work, we have applied a semi-empirical spectral classification method for OB-stars using the APOGEE spectrograph to a sample of candidates in the W3-W4-W5 (W345) complexes. These massive star-forming regions span over 200 pc across the Perseus arm and have a notorious population of massive stars, from which a large fraction are members of various embedded and young open clusters. From 288 APOGEE spectra showing H-band spectral features typical of O- and B-type sources, 46 probably correspond to previously unknown O-type stars. Therefore, we confirm that Br11-Br13 together with He II λ16923 (7-12) and He II λ15723 (7-13) lines contained in the APOGEE spectral bands are useful in providing spectral classification down to one spectral sub-class for massive stars in regions as distant as d ≃ 2 kpc. The large number of newly found O-type stars as well as the numerous intermediate-mass population confirm that W345 is a very efficient massive star factory, with an integral stellar population probably amounting several thousand solar masses.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: stellar content - infrared: stars - stars: early-type - stars: massive - techniques: spectroscopic

Status in Simbad:  waiting for electronic table

Simbad objects: 10

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2019.09.18-14:11:08

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