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@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 a 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, roč.~129, č.~981, s.~114201-114210. ISSN~0004-6280. doi:10.1088/1538-3873/aa8cbd. 2017.
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