Chemically peculiar stars as seen with 2MASS

J 2016

Chemically peculiar stars as seen with 2MASS

HERDIN, Andreas, Ernst PAUNZEN and Martin NETOPIL

Basic information

Original name

Chemically peculiar stars as seen with 2MASS

Authors

HERDIN, Andreas (40 Austria), Ernst PAUNZEN (40 Austria, belonging to the institution) and Martin NETOPIL (40 Austria, belonging to the institution)

Edition

ASTRONOMY & ASTROPHYSICS, LES ULIS CEDEX A, EDP SCIENCES S A, 2016, 1432-0746

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 5.014

RIV identification code

RIV/00216224:14310/16:00087847

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1051/0004-6361/201527390

UT WoS

000369710300074

Keywords in English

stars: chemically peculiar; stars: early-type; techniques: photometric

Abstract

V originále

Context. The chemically peculiar (CP) stars of the upper main sequence are well suited for investigating the impact of magnetic fields and diffusion on the surface layers of slowly rotating stars. They can even be traced in the Magellanic Clouds and are important to the understandine of the stellar formation and evolution. Aims. A systematic investigation of the near-infrared (NIR), 2MASS. JHK(s), photometry for the group of CP stars has never been performed. Nowadays, there is a great deal of data available in the NIR that reach very large distances. It is therefore very important for CP stars to be unambiguously detected in the NIR region and for these detections to be used to derive astrophysical parameters (age and mass) by applying isochrone fitting. Furthermore, we investigated whether the CP stars behave in a different way to normal-type stars in the various photometric diagrams. Methods. For our analysis, we carefully compiled a sample of CP and apparently normal (non-peculiar) type stars. Only stars for which high-quality (i.e. with low error levels), astrometric, and photometric data are available were chosen. In total, 639 normal and 622 CP stars were selected and further analysed. All stars were dereddened and calibrated in terms of the effective temperature and absolute magnitude (luminosity). Finally, isochrone fitting was applied. Results. No differences in the astrophysical parameters derived from 2MASS and Iohnson UBV photometry were found. Furthermore, no statistical significant deviations from the normal type stars within several colotu--colour and colour magnitude diagrams were discovered. Therefore, it is not possible to detect new CP stars with the help of the photometric 2MASS colours only. A new effective temperature calibration, valid for all CP stars, using the (V - K-S)(0) colour was derived.

Links

GP14-26115P, research and development project

Name: Vstříc k jednotné škále metalicity pro otevřené hvězdokupy

Investor: Czech Science Foundation

3SGA5916, interní kód MU

Name: Hvězdy a hvězdokupy v Magellanových mračnech (Acronym: Webda MaC)

Investor: South-Moravian Region, Incoming grants

7AMB14AT015, research and development project

Name: Nový pohled na magnetické hvězdy (Acronym: MAGSTARS)

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

HERDIN, Andreas, Ernst PAUNZEN and Martin NETOPIL. Chemically peculiar stars as seen with 2MASS. ASTRONOMY & ASTROPHYSICS. LES ULIS CEDEX A: EDP SCIENCES S A, 2016, vol. 585, January, p. "nestrankovano", 5 pp. ISSN 1432-0746. Available from: https://dx.doi.org/10.1051/0004-6361/201527390.

@article{1339324,
   author = {Herdin, Andreas and Paunzen, Ernst and Netopil, Martin},
   article_location = {LES ULIS CEDEX A},
   article_number = {January},
   doi = {http://dx.doi.org/10.1051/0004-6361/201527390},
   keywords = {stars: chemically peculiar; stars: early-type; techniques: photometric},
   language = {eng},
   issn = {1432-0746},
   journal = {ASTRONOMY & ASTROPHYSICS},
   title = {Chemically peculiar stars as seen with 2MASS},
   volume = {585},
   year = {2016}
}

TY  - JOUR
ID  - 1339324
AU  - Herdin, Andreas - Paunzen, Ernst - Netopil, Martin
PY  - 2016
TI  - Chemically peculiar stars as seen with 2MASS
JF  - ASTRONOMY & ASTROPHYSICS
VL  - 585
IS  - January
SP  - "nestrankovano"
EP  - "nestrankovano"
PB  - EDP SCIENCES S A
SN  - 14320746
KW  - stars: chemically peculiar
KW  - stars: early-type
KW  - techniques: photometric
N2  - Context. The chemically peculiar (CP) stars of the upper main sequence are well suited for investigating the impact of magnetic fields and diffusion on the surface layers of slowly rotating stars. They can even be traced in the Magellanic Clouds and are important to the understandine of the stellar formation and evolution. Aims. A systematic investigation of the near-infrared (NIR), 2MASS. JHK(s), photometry for the group of CP stars has never been performed. Nowadays, there is a great deal of data available in the NIR that reach very large distances. It is therefore very important for CP stars to be unambiguously detected in the NIR region and for these detections to be used to derive astrophysical parameters (age and mass) by applying isochrone fitting. Furthermore, we investigated whether the CP stars behave in a different way to normal-type stars in the various photometric diagrams. Methods. For our analysis, we carefully compiled a sample of CP and apparently normal (non-peculiar) type stars. Only stars for which high-quality (i.e. with low error levels), astrometric, and photometric data are available were chosen. In total, 639 normal and 622 CP stars were selected and further analysed. All stars were dereddened and calibrated in terms of the effective temperature and absolute magnitude (luminosity). Finally, isochrone fitting was applied. Results. No differences in the astrophysical parameters derived from 2MASS and Iohnson UBV photometry were found. Furthermore, no statistical significant deviations from the normal type stars within several colotu--colour and colour magnitude diagrams were discovered. Therefore, it is not possible to detect new CP stars with the help of the photometric 2MASS colours only. A new effective temperature calibration, valid for all CP stars, using the (V - K-S)(0) colour was derived.
ER  -

HERDIN, Andreas, Ernst PAUNZEN and Martin NETOPIL. Chemically peculiar stars as seen with 2MASS. \textit{ASTRONOMY \&{}amp; ASTROPHYSICS}. LES ULIS CEDEX A: EDP SCIENCES S A, 2016, vol.~585, January, p.~''nestrankovano'', 5 pp. ISSN~1432-0746. Available from: https://dx.doi.org/10.1051/0004-6361/201527390.

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