V346 Centauri: Early-type eclipsing binary with apsidal motion
and abrupt change of orbital period

J 2016

V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period

MAYER, Pavel, Petr HARMANEC, Marek WOLF, Jana NEMRAVOVÁ, Andrej PRŠA et. al.

Basic information

Original name

V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period

Authors

MAYER, Pavel (203 Czech Republic, guarantor), Petr HARMANEC (203 Czech Republic), Marek WOLF (203 Czech Republic), Jana NEMRAVOVÁ (203 Czech Republic), Andrej PRŠA (705 Slovenia), Yves FRÉMAT (56 Belgium), Miloslav ZEJDA (203 Czech Republic, belonging to the institution), Jiří LIŠKA (203 Czech Republic, belonging to the institution), Jakub JURYŠEK (203 Czech Republic), Kateřina HOŇKOVÁ (203 Czech Republic) and Martin MAŠEK (203 Czech Republic)

Edition

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

Impact factor

Impact factor: 4.378 in 2014

RIV identification code

RIV/00216224:14310/16:00093970

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1051/0004-6361/201628655

UT WoS

000379141300138

Keywords in English

stars: early-type; binaries: close; stars: individual: V346 Cen

Abstract

V originále

New physical elements of the early B-type eclipsing binary V346 Cen are derived using the HARPS spectra downloaded from the ESO archive and also numerous photometric observations from various sources. A model of the observed times of primary and secondary minima that fits them best is a combination of the apsidal motion and an abrupt decrease in the orbital period from 6(d).322123 to 6(d).321843 (shortening by 24 s), which occurred somewhere around JD 2 439 000. Assumption of a secularly decreasing orbital period provides a significantly worse fit. Local times of minima and the final solution of the light curve were obtained with the program PHOEBE. Radial velocities of both binary components, free of line blending, were derived via 2D cross-correlation with a program built on the principles of the program TODCOR. The oxygen lines in the secondary spectra are weaker than those in the model spectra of solar chemical composition. Using the component spectra disentangled with the program KOREL,we find that both components rotate considerably faster than would correspond to the synchronization at periastron. The apside rotation known from earlier studies is confirmed and compared to the theoretical value.

Citovat

MAYER, Pavel, Petr HARMANEC, Marek WOLF, Jana NEMRAVOVÁ, Andrej PRŠA, Yves FRÉMAT, Miloslav ZEJDA, Jiří LIŠKA, Jakub JURYŠEK, Kateřina HOŇKOVÁ and Martin MAŠEK. V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period. ASTRONOMY & ASTROPHYSICS. LES ULIS CEDEX A: EDP SCIENCES S A, 2016, vol. 591, July, p. "nestrankovano", 9 pp. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201628655.

@article{1376292,
   author = {Mayer, Pavel and Harmanec, Petr and Wolf, Marek and Nemravová, Jana and Prša, Andrej and Frémat, Yves and Zejda, Miloslav and Liška, Jiří and Juryšek, Jakub and Hoňková, Kateřina and Mašek, Martin},
   article_location = {LES ULIS CEDEX A},
   article_number = {July},
   doi = {http://dx.doi.org/10.1051/0004-6361/201628655},
   keywords = {stars: early-type; binaries: close; stars: individual: V346 Cen},
   language = {eng},
   issn = {0004-6361},
   journal = {ASTRONOMY & ASTROPHYSICS},
   title = {V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period},
   volume = {591},
   year = {2016}
}

TY  - JOUR
ID  - 1376292
AU  - Mayer, Pavel - Harmanec, Petr - Wolf, Marek - Nemravová, Jana - Prša, Andrej - Frémat, Yves - Zejda, Miloslav - Liška, Jiří - Juryšek, Jakub - Hoňková, Kateřina - Mašek, Martin
PY  - 2016
TI  - V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period
JF  - ASTRONOMY & ASTROPHYSICS
VL  - 591
IS  - July
SP  - "nestrankovano"
EP  - "nestrankovano"
PB  - EDP SCIENCES S A
SN  - 00046361
KW  - stars: early-type
KW  - binaries: close
KW  - stars: individual: V346 Cen
N2  - New physical elements of the early B-type eclipsing binary V346 Cen are derived using the HARPS spectra downloaded from the ESO archive and also numerous photometric observations from various sources. A model of the observed times of primary and secondary minima that fits them best is a combination of the apsidal motion and an abrupt decrease in the orbital period from 6(d).322123 to 6(d).321843 (shortening by 24 s), which occurred somewhere around JD 2 439 000. Assumption of a secularly decreasing orbital period provides a significantly worse fit. Local times of minima and the final solution of the light curve were obtained with the program PHOEBE. Radial velocities of both binary components, free of line blending, were derived via 2D cross-correlation with a program built on the principles of the program TODCOR. The oxygen lines in the secondary spectra are weaker than those in the model spectra of solar chemical composition. Using the component spectra disentangled with the program KOREL,we find that both components rotate considerably faster than would correspond to the synchronization at periastron. The apside rotation known from earlier studies is confirmed and compared to the theoretical value.
ER  -

MAYER, Pavel, Petr HARMANEC, Marek WOLF, Jana NEMRAVOVÁ, Andrej PRŠA, Yves FRÉMAT, Miloslav ZEJDA, Jiří LIŠKA, Jakub JURYŠEK, Kateřina HOŇKOVÁ and Martin MAŠEK. V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period. \textit{ASTRONOMY \&{}amp; ASTROPHYSICS}. LES ULIS CEDEX A: EDP SCIENCES S A, 2016, vol.~591, July, p.~''nestrankovano'', 9 pp. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201628655.

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