SIMBAD references

2016AJ....152...31A - Astron. J., 152, 31-31 (2016/August-0)

Spectral classification and properties of the OVz stars in the galactic O star spectroscopic survey (GOSSS).

ARIAS J.I., WALBORN N.R., DIAZ S.S., BARBA R.H., MAIZ-APELLANIZ J., SABIN-SANJULIAN C., GAMEN R.C., MORRELL N.I., SOTA A., MARCO A., NEGUERUELA I., LEAO J.R.S., HERRERO A. and ALFARO E.J.

Abstract (from CDS):

On the basis of the Galactic O Star Spectroscopic Survey (GOSSS), we present a detailed systematic investigation of the O Vz stars. The currently used spectral classification criteria are rediscussed, and the Vz phenomenon is recalibrated through the addition of a quantitative criterion based on the equivalent widths of the He i λ4471, He ii λ4542, and He ii λ4686 spectral lines. The GOSSS O Vz and O V populations resulting from the newly adopted spectral classification criteria are comparatively analyzed. The locations of the O Vz stars are probed, showing a concentration of the most extreme cases toward the youngest star-forming regions. The occurrence of the Vz spectral peculiarity in a solar-metallicity environment, as predicted by the fastwind code, is also investigated, confirming the importance of taking into account several processes for the correct interpretation of the phenomenon.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: early-type - stars: fundamental parameters - surveys - surveys

VizieR on-line data: <Available at CDS (J/AJ/152/31): table1.dat table2.dat table3.dat>

CDS comments: In Table 5, Sh 1-48 is a probable misprint for Sh 2-48.

Simbad objects: 318

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2019.12.10-14:38:03

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