Photometric Stromgren-H beta Quantification for O and B Stars
of Luminosity Class V

J 2017

Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V

KALTCHEVA, Nadia, Valeri GOLEV and Ernst PAUNZEN

Basic information

Original name

Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V

Authors

KALTCHEVA, Nadia (840 United States of America), Valeri GOLEV (100 Bulgaria) and Ernst PAUNZEN (40 Austria, guarantor, belonging to the institution)

Edition

Publications of the Astronomical Society of the Pacific, Bristol, IOP PUBLISHING LTD, 2017, 0004-6280

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 3.409

RIV identification code

RIV/00216224:14310/17:00099901

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1088/1538-3873/aa8cbd

UT WoS

000412416800001

Keywords in English

stars: early-type; techniques: photometric; stars: fundamental parameters

Abstract

V originále

In any photometric system, the relationship between the spectral type and the intrinsic colors is fundamental for the photometric stellar classification and for a reliable derivation of stellar parameters. Such relationships are being constantly verified and improved based on larger and better samples. The capability of the Stromgren-H beta photometry to provide reddening-free quantities allows the classification of reddened stars over the entire spectral sequence. However, a detailed consistent tabulation of the uvby beta quantities for the O-B9 part of the main sequence is currently warranted. We combine spectral types and photometry from the literature to provide a new empirical tabulation of the intrinsic color b - y, color differences c(1), m(1), [c(1)] and [m(1)] and the H beta index for main-sequence (luminosity class V) stars of spectral types O4.5 through B9.5 in terms of spectral sub-types. Our survey is based on more than 1400 stars. We use the established c(1) versus b - y intrinsic line and the accepted reddening slopes to obtain dereddened quantities and then calculate their median values as a function of the spectral sub-type. The classification ability of the system in this spectral range is reliable and the photometric quantities are not affected by the stellar rotation.

Citovat

KALTCHEVA, Nadia, Valeri GOLEV and Ernst PAUNZEN. Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V. Publications of the Astronomical Society of the Pacific. Bristol: IOP PUBLISHING LTD, 2017, vol. 129, No 981, p. 114201-114210. ISSN 0004-6280. Available from: https://dx.doi.org/10.1088/1538-3873/aa8cbd.

@article{1406903,
   author = {Kaltcheva, Nadia and Golev, Valeri and Paunzen, Ernst},
   article_location = {Bristol},
   article_number = {981},
   doi = {http://dx.doi.org/10.1088/1538-3873/aa8cbd},
   keywords = {stars: early-type; techniques: photometric; stars: fundamental parameters},
   language = {eng},
   issn = {0004-6280},
   journal = {Publications of the Astronomical Society of the Pacific},
   title = {Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V},
   volume = {129},
   year = {2017}
}

TY  - JOUR
ID  - 1406903
AU  - Kaltcheva, Nadia - Golev, Valeri - Paunzen, Ernst
PY  - 2017
TI  - Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V
JF  - Publications of the Astronomical Society of the Pacific
VL  - 129
IS  - 981
SP  - 114201-114210
EP  - 114201-114210
PB  - IOP PUBLISHING LTD
SN  - 00046280
KW  - stars: early-type
KW  - techniques: photometric
KW  - stars: fundamental parameters
N2  - In any photometric system, the relationship between the spectral type and the intrinsic colors is fundamental for the photometric stellar classification and for a reliable derivation of stellar parameters. Such relationships are being constantly verified and improved based on larger and better samples. The capability of the Stromgren-H beta photometry to provide reddening-free quantities allows the classification of reddened stars over the entire spectral sequence. However, a detailed consistent tabulation of the uvby beta quantities for the O-B9 part of the main sequence is currently warranted. We combine spectral types and photometry from the literature to provide a new empirical tabulation of the intrinsic color b - y, color differences c(1), m(1), [c(1)] and [m(1)] and the H beta index for main-sequence (luminosity class V) stars of spectral types O4.5 through B9.5 in terms of spectral sub-types. Our survey is based on more than 1400 stars. We use the established c(1) versus b - y intrinsic line and the accepted reddening slopes to obtain dereddened quantities and then calculate their median values as a function of the spectral sub-type. The classification ability of the system in this spectral range is reliable and the photometric quantities are not affected by the stellar rotation.
ER  -

KALTCHEVA, Nadia, Valeri GOLEV and Ernst PAUNZEN. Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V. \textit{Publications of the Astronomical Society of the Pacific}. Bristol: IOP PUBLISHING LTD, 2017, vol.~129, No~981, p.~114201-114210. ISSN~0004-6280. Available from: https://dx.doi.org/10.1088/1538-3873/aa8cbd.

Detailed Information on Publication Record