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

J 2020

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

KALTCHEVA, Nadia; Ernst PAUNZEN; Michal PRIŠEGEN; Valeri GOLEV; Michael WATSON et. al.

Základní údaje

Originální název

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

Autoři

KALTCHEVA, Nadia; Ernst PAUNZEN; Michal PRIŠEGEN; Valeri GOLEV a Michael WATSON

Vydání

Publications of the Astronomical Society of the Pacific, Bristol, IOP PUBLISHING LTD, 2020, 0004-6280

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.445

Kód RIV

RIV/00216224:14310/20:00115935

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1088/1538-3873/ab8cce

UT WoS

000541754100001

EID Scopus

2-s2.0-85090698443

Klíčová slova anglicky

stars: distances; stars: fundamental parameters; (stars:) Hertzsprung-Russell and C-M diagrams; (stars:) supergiants

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 19. 10. 2020 10:22, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

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.

Citovat

KALTCHEVA, Nadia; Ernst PAUNZEN; Michal PRIŠEGEN; Valeri GOLEV a Michael WATSON. Absolute Magnitudes of Early-type Supergiants from uvby beta Photometry and Parallax Data. Publications of the Astronomical Society of the Pacific. Bristol: IOP PUBLISHING LTD, 2020, roč. 132, č. 1013, s. 1-12. ISSN 0004-6280. Dostupné z: https://doi.org/10.1088/1538-3873/ab8cce.

@article{1669617,
   author = {Kaltcheva, Nadia and Paunzen, Ernst and Prišegen, Michal and Golev, Valeri and Watson, Michael},
   article_location = {Bristol},
   article_number = {1013},
   doi = {https://doi.org/10.1088/1538-3873/ab8cce},
   keywords = {stars: distances; stars: fundamental parameters; (stars:) Hertzsprung-Russell and C-M diagrams; (stars:) supergiants},
   language = {eng},
   issn = {0004-6280},
   journal = {Publications of the Astronomical Society of the Pacific},
   title = {Absolute Magnitudes of Early-type Supergiants from uvby beta Photometry and Parallax Data},
   url = {https://doi.org/10.1088/1538-3873/ab8cce},
   volume = {132},
   year = {2020}
}

TY  - JOUR
ID  - 1669617
AU  - Kaltcheva, Nadia - Paunzen, Ernst - Prišegen, Michal - Golev, Valeri - Watson, Michael
PY  - 2020
TI  - Absolute Magnitudes of Early-type Supergiants from uvby beta Photometry and Parallax Data
JF  - Publications of the Astronomical Society of the Pacific
VL  - 132
IS  - 1013
SP  - 1-12
EP  - 1-12
PB  - IOP PUBLISHING LTD
SN  - 00046280
KW  - stars: distances
KW  - stars: fundamental parameters
KW  - (stars:) Hertzsprung-Russell and C-M diagrams
KW  - (stars:) supergiants
UR  - https://doi.org/10.1088/1538-3873/ab8cce
L2  - https://doi.org/10.1088/1538-3873/ab8cce
N2  - 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.
ER  -

KALTCHEVA, Nadia; Ernst PAUNZEN; Michal PRIŠEGEN; Valeri GOLEV a Michael WATSON. Absolute Magnitudes of Early-type Supergiants from uvby beta Photometry and Parallax Data. \textit{Publications of the Astronomical Society of the Pacific}. Bristol: IOP PUBLISHING LTD, 2020, roč.~132, č.~1013, s.~1-12. ISSN~0004-6280. Dostupné z: https://doi.org/10.1088/1538-3873/ab8cce.

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