Search for forced oscillations in binaries. IV. The eclipsing
binary V436 Per revisited

J 2003

Search for forced oscillations in binaries. IV. The eclipsing binary V436 Per revisited

JANÍK, J., P. HARMANEC, H. LEHMANN, S. YANG, H. BOŽIČ et. al.

Základní údaje

Originální název

Search for forced oscillations in binaries. IV. The eclipsing binary V436 Per revisited

Autoři

JANÍK, J. (203 Česká republika, garant), P. HARMANEC (203 Česká republika), H. LEHMANN (276 Německo), S. YANG (124 Kanada), H. BOŽIČ (191 Chorvatsko), H. AK (792 Turecko), P. HADRAVA (203 Česká republika), P. EENENS (484 Mexiko), D. RUŽDJAK (191 Chorvatsko), D. SUDAR (191 Chorvatsko), I. HUBENÝ (840 Spojené státy) a A.P. LINNELL (840 Spojené státy)

Vydání

Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2003, 0004-6361

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 3.843

Kód RIV

RIV/00216224:14310/03:00008581

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

binaries stars; eclipsing stars; spectroscopic stars; fundamental parameters; oscillations;

Štítky

binaries stars, eclipsing stars, fundamental parameters, oscillations, spectroscopic stars

Změněno: 22. 6. 2004 13:22, RNDr. JUDr. Vladimír Šmíd, CSc.

Anotace

V originále

An analysis of new spectroscopic and photoelectric U B V observations, satisfactorily covering the whole orbital period of V436 Per, together with existing data allowed us to improve the knowledge of the basic physical characteristics of the binary and its components. In several aspects, our new results differ from the findings of Paper I of this series: in particular, we found that it is the star eclipsed in the secondary minimum which is slightly more massive and larger than the optical primary. We also conclude that the apsidal advance - if present at all - is much slower than that estimated in a previous study. The orbital period might be increasing by 0.28 s per year but also this finding is very uncertain and needs verification by future observations. It is encouraging to note that two completely independent sets of programs for light-curve solutions lead to identical results. A notable finding is that both binary components rotate with very similar - if not identical - rotational periods of 1d.45 and 1d.40, much shorter than what would correspond to a 10d.9 spin-orbit synchronization period at periastron. Rapid line-profile changes reported earlier could not be confirmed from new, dedicated series of high-resolution and S/N spectra.

Návaznosti

GA205/02/0445, projekt VaV

Název: Fyzika horkých hvězd a hvězdných systémů s horkými složkami

Investor: Grantová agentura ČR, Fyzika horkých hvězd a hvězdných systémů s horkými složkami

GA205/96/0162, projekt VaV

Název: Hledání vynucených neradiálních oscilací u horkých složek dvojhvězd

Citovat

JANÍK, J., P. HARMANEC, H. LEHMANN, S. YANG, H. BOŽIČ, H. AK, P. HADRAVA, P. EENENS, D. RUŽDJAK, D. SUDAR, I. HUBENÝ a A.P. LINNELL. Search for forced oscillations in binaries. IV. The eclipsing binary V436 Per revisited. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2003, roč. 2003, č. 408, s. 611-619. ISSN 0004-6361.

@article{489291,
   author = {Janík, J. and Harmanec, P. and Lehmann, H. and Yang, S. and Božič, H. and Ak, H. and Hadrava, P. and Eenens, P. and Ruždjak, D. and Sudar, D. and Hubený, I. and Linnell, A.P.},
   article_location = {Les Ulis Cedex, France},
   article_number = {408},
   keywords = {binaries stars; eclipsing stars; spectroscopic stars; fundamental parameters; oscillations;},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Search for forced oscillations in binaries. IV. The eclipsing binary V436 Per revisited},
   volume = {2003},
   year = {2003}
}

TY  - JOUR
ID  - 489291
AU  - Janík, J. - Harmanec, P. - Lehmann, H. - Yang, S. - Božič, H. - Ak, H. - Hadrava, P. - Eenens, P. - Ruždjak, D. - Sudar, D. - Hubený, I. - Linnell, A.P.
PY  - 2003
TI  - Search for forced oscillations in binaries. IV. The eclipsing binary V436 Per revisited
JF  - Astronomy and Astrophysics
VL  - 2003
IS  - 408
SP  - 611-619
EP  - 611-619
PB  - EDP Sciences
SN  - 00046361
KW  - binaries stars
KW  - eclipsing stars
KW  - spectroscopic stars
KW  - fundamental parameters
KW  - oscillations;
N2  - An analysis of new spectroscopic and photoelectric U B V observations, satisfactorily covering the whole orbital period of V436 Per, together with existing data allowed us to improve the knowledge of the basic physical characteristics of the binary and its components. In several aspects, our new results differ from the findings of Paper I of this series: in particular, we found that it is the star eclipsed in the secondary minimum which is slightly more massive and larger than the optical primary. We also conclude that the apsidal advance - if present at all - is much slower than that estimated in a previous study. The orbital period might be increasing by 0.28 s per year but also this finding is very uncertain and needs verification by future observations. It is encouraging to note that two completely independent sets of programs for light-curve solutions lead to identical results. A notable finding is that both binary components rotate with very similar - if not identical - rotational periods of 1d.45 and 1d.40, much shorter than what would correspond to a 10d.9 spin-orbit synchronization period at periastron. Rapid line-profile changes reported earlier could not be confirmed from new, dedicated series of high-resolution and S/N spectra.
ER  -

JANÍK, J., P. HARMANEC, H. LEHMANN, S. YANG, H. BOŽIČ, H. AK, P. HADRAVA, P. EENENS, D. RUŽDJAK, D. SUDAR, I. HUBENÝ a A.P. LINNELL. Search for forced oscillations in binaries. IV. The eclipsing binary V436 Per revisited. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2003, roč.~2003, č.~408, s.~611-619. ISSN~0004-6361.

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