The light variations of HD 37776 as a result of the uneven
surface distribution of helium and silicon

D 2007

The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon

KRTIČKA, Jiří; Zdeněk MIKULÁŠEK; Juraj ZVERKO and Jozef ŽIŽŃOVSKÝ

Basic information

Original name

The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon

Name in Czech

Proměnnost HD 37776 jako důsledek nerovnoměrného povrchového rozložení helia a křemíku

Authors

KRTIČKA, Jiří; Zdeněk MIKULÁŠEK; Juraj ZVERKO and Jozef ŽIŽŃOVSKÝ

Edition

Niznyj Archyz, Rusko, Physics of Magnetic Stars, p. 310-314, 5 pp. 2007

Publisher

Special Astrophysical Observatory

Other information

Language

English

Type of outcome

Proceedings paper

Field of Study

10308 Astronomy

Country of publisher

Russian Federation

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Marked to be transferred to RIV

Yes

RIV identification code

RIV/00216224:14310/07:00020946

Organization unit

Faculty of Science

ISBN

5-91155-009-1

Keywords in English

stars: chemically peculiar -- stars: early-type -- stars: variables: other -- stars: atmospheres

Abstract

ORIG CZ

In the original language

We calculate the uvby light curves of the helium-strong chemically peculiar (CP) star HD 37776. Assuming that the chemical peculiarity influences the monochromatic radiative flux due to mainly the bound-free processes and using the model of the surface distribution of helium and silicon on HD 37776, as derived from spectroscopy, we calculate the emergent fluxes for a series of its rotational phases. We show that it is possible to consistently simulate light curves of a chemically peculiar star and that the basic properties of variability of helium CP stars can be understood in terms of the model of spots with a peculiar chemical composition.

In Czech

Spočtetli jsme uvby větelné křivky hvězdy HD 37776. Ukázali jsme, že světelná proměnnost této hvězdy je způsobena nerovnoměrným povrchovým rozložení křemíku a helia.

Links

GA205/06/0217, research and development project

Name: Nové postupy ve zpracování a interpretaci pozorování proměnných hvězd

Investor: Czech Science Foundation, New approaches to variable stars data processing and interpretation

ME 131, research and development project

Name: Výzkum kapalných krystalických polymerů

Cite

KRTIČKA, Jiří; Zdeněk MIKULÁŠEK; Juraj ZVERKO and Jozef ŽIŽŃOVSKÝ. The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon. In Physics of Magnetic Stars. Niznyj Archyz, Rusko: Special Astrophysical Observatory, 2007, p. 310-314. ISBN 5-91155-009-1.

@inproceedings{760121,
   author = {Krtička, Jiří and Mikulášek, Zdeněk and Zverko, Juraj and Žižńovský, Jozef},
   address = {Niznyj Archyz, Rusko},
   booktitle = {Physics of Magnetic Stars},
   keywords = {stars: chemically peculiar -- stars: early-type -- stars: variables: other -- stars: atmospheres},
   language = {eng},
   location = {Niznyj Archyz, Rusko},
   isbn = {5-91155-009-1},
   pages = {310-314},
   publisher = {Special Astrophysical Observatory},
   title = {The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon},
   url = {http://arxiv.org/abs/astro-ph/0703396},
   year = {2007}
}

TY  - CONF
ID  - 760121
AU  - Krtička, Jiří - Mikulášek, Zdeněk - Zverko, Juraj - Žižńovský, Jozef
PY  - 2007
TI  - The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon
PB  - Special Astrophysical Observatory
CY  - Niznyj Archyz, Rusko
SN  - 5911550091
KW  - stars: chemically peculiar -- stars: early-type -- stars: variables: other -- stars: atmospheres
UR  - http://arxiv.org/abs/astro-ph/0703396
N2  - We calculate the uvby light curves of the helium-strong chemically peculiar (CP) star HD 37776. Assuming that the chemical peculiarity influences the monochromatic radiative flux due to mainly the bound-free processes and using the model of the surface distribution of helium and silicon on HD 37776, as derived from spectroscopy, we calculate the emergent fluxes for a series of its rotational phases. We show that it is possible to consistently simulate light curves of a chemically peculiar star and that the basic properties of variability of helium CP stars can be understood in terms of the model of spots with a peculiar chemical composition.
ER  -

KRTIČKA, Jiří; Zdeněk MIKULÁŠEK; Juraj ZVERKO and Jozef ŽIŽ$\backslash$'NOVSKÝ. The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon. In \textit{Physics of Magnetic Stars}. Niznyj Archyz, Rusko: Special Astrophysical Observatory, 2007, p.~310-314. ISBN~5-91155-009-1.

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