Rapid apsidal motion in eccentric eclipsing binaries: OX
Cassiopeia, PV Cassiopeia, and CO Lacertae

J 2008

Rapid apsidal motion in eccentric eclipsing binaries: OX Cassiopeia, PV Cassiopeia, and CO Lacertae

ŠVAŘÍČEK, Petr, Marek WOLF, A. CLARET, Lenka KOTKOVÁ, Luboš BRÁT et. al.

Basic information

Original name

Rapid apsidal motion in eccentric eclipsing binaries: OX Cassiopeia, PV Cassiopeia, and CO Lacertae

Name in Czech

Rychlý apsidální pohyb v excentrických dvojhvězdách OX Cas, PV Cas a CO Lac

Authors

ŠVAŘÍČEK, Petr (203 Czech Republic), Marek WOLF (203 Czech Republic), A. CLARET (724 Spain), Lenka KOTKOVÁ (203 Czech Republic), Luboš BRÁT (203 Czech Republic), Ladislav ŠMELCER (203 Czech Republic) and Miloslav ZEJDA (203 Czech Republic, guarantor)

Edition

Astronomy and Astrophysics, 2008, 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: 4.153

RIV identification code

RIV/00216224:14310/08:00024826

Organization unit

Faculty of Science

UT WoS

000251858700030

Keywords in English

eclipsing binaries; OX Cas; PV Cas; CO Lac; fundamental parameters; early type

Abstract

ORIG CZ

V originále

Aims.Double-lined eclipsing binaries are a traditional tool to test the capability of the stellar evolutionary models. If such binaries show apsidal motion, it is also possible to check, in addition to their absolute dimensions, some aspects of their internal structure. In order to perform this additional test, we monitored the times of a minimum of three eclipsing binaries with accurate absolute dimensions. Methods: Approximately thirty new precise times of minimum light recorded with CCD photometers were obtained for three early-type eccentric-orbit eclipsing binaries OX Cas (P = 2.49 deg, e = 0.041), PV Cas (1.75 deg, 0.032), and CO Lac (1.54 deg, 0.029). O-C diagrams were analyzed by the Lacy's method using all reliable timings found in the literature, and the elements of apsidal motion were improved. On the other hand, stellar models computed for the precise observed masses of the three systems were used as theoretical tools to compare with the observed shift in the periastron position. Results: We confirm very short periods of apsidal motion of approximately 38.2, 91.0, and 43.4 years for OX Cas, PV Cas, and CO Lac, respectively. The relativistic effects are negligible, being up to 6% of the total apsidal motion rate in all systems. The corresponding observed apsidal motion rates are in good agreement with the theoretical predictions, except for the case of PV Cas, whose components seem to be more mass concentrated than the models predict.

In Czech

Rychlý apsidální pohyb v excentrických dvojhvězdách OX Cas, PV Cas a CO Lac

Links

GA205/04/2063, research and development project

Name: Fotometrický výzkum zákrytových dvojhvězd

Investor: Czech Science Foundation

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

Citovat

ŠVAŘÍČEK, Petr, Marek WOLF, A. CLARET, Lenka KOTKOVÁ, Luboš BRÁT, Ladislav ŠMELCER and Miloslav ZEJDA. Rapid apsidal motion in eccentric eclipsing binaries: OX Cassiopeia, PV Cassiopeia, and CO Lacertae. Astronomy and Astrophysics. 2008, vol. 477, No 2, p. 615-620. ISSN 0004-6361.

@article{772278,
   author = {Švaříček, Petr and Wolf, Marek and Claret, A. and Kotková, Lenka and Brát, Luboš and Šmelcer, Ladislav and Zejda, Miloslav},
   article_number = {2},
   keywords = {eclipsing binaries; OX Cas; PV Cas; CO Lac; fundamental parameters; early type},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Rapid apsidal motion in eccentric eclipsing binaries: OX Cassiopeia, PV Cassiopeia, and CO Lacertae},
   url = {http://adsabs.harvard.edu/abs/2008A%26A...477..615S},
   volume = {477},
   year = {2008}
}

TY  - JOUR
ID  - 772278
AU  - Švaříček, Petr - Wolf, Marek - Claret, A. - Kotková, Lenka - Brát, Luboš - Šmelcer, Ladislav - Zejda, Miloslav
PY  - 2008
TI  - Rapid apsidal motion in eccentric eclipsing binaries: OX Cassiopeia, PV Cassiopeia, and CO Lacertae
JF  - Astronomy and Astrophysics
VL  - 477
IS  - 2
SP  - 615-620
EP  - 615-620
SN  - 00046361
KW  - eclipsing binaries
KW  - OX Cas
KW  - PV Cas
KW  - CO Lac
KW  - fundamental parameters
KW  - early type
UR  - http://adsabs.harvard.edu/abs/2008A%26A...477..615S
N2  - Aims.Double-lined eclipsing binaries are a traditional tool to test the capability of the stellar evolutionary models. If such binaries show apsidal motion, it is also possible to check, in addition to their absolute dimensions, some aspects of their internal structure. In order to perform this additional test, we monitored the times of a minimum of three eclipsing binaries with accurate absolute dimensions. Methods: Approximately thirty new precise times of minimum light recorded with CCD photometers were obtained for three early-type eccentric-orbit eclipsing binaries OX Cas (P = 2.49 deg, e = 0.041), PV Cas (1.75 deg, 0.032), and CO Lac (1.54 deg, 0.029). O-C diagrams were analyzed by the Lacy's method using all reliable timings found in the literature, and the elements of apsidal motion were improved. On the other hand, stellar models computed for the precise observed masses of the three systems were used as theoretical tools to compare with the observed shift in the periastron position. Results: We confirm very short periods of apsidal motion of approximately 38.2, 91.0, and 43.4 years for OX Cas, PV Cas, and CO Lac, respectively. The relativistic effects are negligible, being up to 6% of the total apsidal motion rate in all systems. The corresponding observed apsidal motion rates are in good agreement with the theoretical predictions, except for the case of PV Cas, whose components seem to be more mass concentrated than the models predict.
ER  -

ŠVAŘÍČEK, Petr, Marek WOLF, A. CLARET, Lenka KOTKOVÁ, Luboš BRÁT, Ladislav ŠMELCER and Miloslav ZEJDA. Rapid apsidal motion in eccentric eclipsing binaries: OX Cassiopeia, PV Cassiopeia, and CO Lacertae. \textit{Astronomy and Astrophysics}. 2008, vol.~477, No~2, p.~615-620. ISSN~0004-6361.

Detailed Information on Publication Record