Absolute Magnitudes of Early-type Supergiants from uvby beta Photometry and Parallax Data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00115935" target="_blank" >RIV/00216224:14310/20:00115935 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1088/1538-3873/ab8cce" target="_blank" >https://doi.org/10.1088/1538-3873/ab8cce</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1538-3873/ab8cce" target="_blank" >10.1088/1538-3873/ab8cce</a>

Result language

angličtina

Original language name

Absolute Magnitudes of Early-type Supergiants from uvby beta Photometry and Parallax Data

Original language description

We combine Stromgren-Crawford uvby beta photometry with Gaia-DR2 parallaxes for a sample of 880 supergiants of O-B9 spectral types to explore the potential of these data in providing physical parameters of such stars. We obtained reddening corrections and photometric absolute magnitudes via the existing uvby beta calibrations. We calculated Gaia-based absolute magnitudes applying individual photometric reddening corrections for each star. The uvby beta photometry is particularly useful in this case, since it provides color excess independent of spectral classification, thus overcoming possible MK classification inconsistencies. After evaluating and correcting the effect of luminosity class mis-classifications on the photometric absolute magnitudes, we found a reasonable agreement between the photometric and Gaia-based absolute magnitudes for this sample. At this point, the color-magnitudeM(V)versus (b-y)(0)diagrams based on photometry and Gaia show slight discrepancies, which have to be addressed in the light of the next Gaia data releases. The derived precise reddening corrections should further help to refine the physical parameters of these stars and address their connection to OB-associations and regions of star formation.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Publications of the Astronomical Society of the Pacific

ISSN

0004-6280

e-ISSN

1538-3873

Volume of the periodical

132

Issue of the periodical within the volume

1013

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

1-12

UT code for WoS article

000541754100001

EID of the result in the Scopus database

2-s2.0-85090698443