Properties and nature of Be stars. XX. Binary nature and
orbital elements of gamma Cas

J 2000

Properties and nature of Be stars. XX. Binary nature and orbital elements of gamma Cas

HARMANEC, Petr, Pevel HABUDA, Stanislav ŠTEFL, Petr HADRAVA, Daniela KORČÁKOVÁ et. al.

Basic information

Original name

Properties and nature of Be stars. XX. Binary nature and orbital elements of gamma Cas

Authors

HARMANEC, Petr, Pevel HABUDA, Stanislav ŠTEFL, Petr HADRAVA, Daniela KORČÁKOVÁ, Pevel KOUBSKÝ, Jiří KRTIČKA, Jiří KUBÁT, Petr ŠKODA, Miroslav ŠLECHTA and Marek WOLF

Edition

Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2000, 0004-6361

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

References:

URL

Impact factor

Impact factor: 2.790

Organization unit

Faculty of Science

Změněno: 20/9/2006 13:06, prof. Mgr. Jiří Krtička, Ph.D.

Abstract

V originále

An analysis of accurate radial velocities (RVs) of the Be star gamma Cas from 295 Reticon spectrograms secured between October 1993 and May 2000 allowed us to prewhiten the RVs for the long-term changes and to obtain the first orbital RV curve of this star. The orbital period is 203 Delta59 and the orbit has an eccentricity of 0.26. The orbital motion is detectable even in the published velocities, based on photographic spectra. This implies that gamma Cas is a primary component of a spectroscopic binary. The secondary has a mass of about 1 \ms, appropriate for a white dwarf or a neutron star, but it could also be a normal late-type dwarf. The ultimate solution of the dispute whether the observed X-ray emission is associated with the secondary or with the primary will need further dedicated studies.

Citovat

HARMANEC, Petr, Pevel HABUDA, Stanislav ŠTEFL, Petr HADRAVA, Daniela KORČÁKOVÁ, Pevel KOUBSKÝ, Jiří KRTIČKA, Jiří KUBÁT, Petr ŠKODA, Miroslav ŠLECHTA and Marek WOLF. Properties and nature of Be stars. XX. Binary nature and orbital elements of gamma Cas. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2000, vol. 33, No 364, p. 85-88. ISSN 0004-6361.

@article{695970,
   author = {Harmanec, Petr and Habuda, Pevel and Štefl, Stanislav and Hadrava, Petr and Korčáková, Daniela and Koubský, Pevel and Krtička, Jiří and Kubát, Jiří and Škoda, Petr and Šlechta, Miroslav and Wolf, Marek},
   article_location = {Les Ulis Cedex, France},
   article_number = {364},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Properties and nature of Be stars. XX. Binary nature and orbital elements of gamma Cas},
   url = {http://aa.springer.de/bibs/0364002/2300l85/small.htm},
   volume = {33},
   year = {2000}
}

TY  - JOUR
ID  - 695970
AU  - Harmanec, Petr - Habuda, Pevel - Štefl, Stanislav - Hadrava, Petr - Korčáková, Daniela - Koubský, Pevel - Krtička, Jiří - Kubát, Jiří - Škoda, Petr - Šlechta, Miroslav - Wolf, Marek
PY  - 2000
TI  - Properties and nature of Be stars. XX. Binary nature and orbital elements of gamma Cas
JF  - Astronomy and Astrophysics
VL  - 33
IS  - 364
SP  - 85-88
EP  - 85-88
PB  - EDP Sciences
SN  - 00046361
UR  - http://aa.springer.de/bibs/0364002/2300l85/small.htm
N2  - An analysis of accurate radial velocities (RVs) of the Be star gamma Cas from 295 Reticon spectrograms secured between October 1993 and May 2000 allowed us to prewhiten the RVs for the long-term changes and to obtain the first orbital RV curve of this star. The orbital period is 203 Delta59 and the orbit has an eccentricity of 0.26. The orbital motion is detectable even in the published velocities, based on photographic spectra. This implies that gamma Cas is a primary component of a spectroscopic binary. The secondary has a mass of about 1 \ms, appropriate for a white dwarf or a neutron star, but it could also be a normal late-type dwarf. The ultimate solution of the dispute whether the observed X-ray emission is associated with the secondary or with the primary will need further dedicated studies.
ER  -

HARMANEC, Petr, Pevel HABUDA, Stanislav ŠTEFL, Petr HADRAVA, Daniela KORČÁKOVÁ, Pevel KOUBSKÝ, Jiří KRTIČKA, Jiří KUBÁT, Petr ŠKODA, Miroslav ŠLECHTA and Marek WOLF. Properties and nature of Be stars. XX. Binary nature and orbital elements of gamma Cas. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2000, vol.~33, No~364, p.~85-88. ISSN~0004-6361.

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