Apsidal motion and TESS light curves of three southern close
eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel

J 2024

Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel

WOLF, Marek; Petr ZASCHE; J. KARA; Miloslav ZEJDA; Jan JANÍK et. al.

Basic information

Original name

Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel

Authors

WOLF, Marek (203 Czech Republic); Petr ZASCHE (203 Czech Republic); J. KARA; Miloslav ZEJDA (203 Czech Republic, guarantor, belonging to the institution); Jan JANÍK (203 Czech Republic, belonging to the institution); M. MAŠEK (203 Czech Republic); M. LEHKY (203 Czech Republic); J. MERC (703 Slovakia); Anna RICHTERKOVÁ (203 Czech Republic, belonging to the institution); Dalibor HANŽL (203 Czech Republic); Zdeněk MIKULÁŠEK (203 Czech Republic, belonging to the institution); S. N. DE VILLIERS (710 South Africa) and Jiří LIŠKA (203 Czech Republic, belonging to the institution)

Edition

Astronomy and Astrophysics, EDP Sciences, 2024, 0004-6361

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 5.400 in 2023

RIV identification code

RIV/00216224:14310/24:00137606

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1051/0004-6361/202450303

UT WoS

001336485200028

EID Scopus

2-s2.0-85207653967

Keywords in English

binaries: eclipsing; stars: early-type; stars: fundamental parameters; stars: individual: GM Nor; stars: individual: V397 Pup; stars: individual: PT Vel

Abstract

V originále

The study of apsidal motion in eccentric eclipsing binaries provides an important observational test of theoretical models of stellar structure and evolution. New ground-based and space-based photometric data have been obtained and archival spectroscopic measurements were used in this study of three detached early-type and southern-hemisphere eccentric eclipsing binaries GM Nor (P = 1(d).88, e = 0.05), V397 Pup (3(d).00, 0.30), and PT Vel (1(d).80, 0.12). Their TESS observations in several sectors have also been included and the corresponding light curves were solved using the PHOEBE code. As a result, new accurate photoelectric times of minimum light have been obtained. The newly completed O - C diagrams were analyzed using all reliable timings found in the literature and calculated using the TESS light curves. New or improved values for the elements of apsidal motion were obtained. Using ESO archive spectroscopy, for V397 Pup, the precise absolute parameters were newly derived: M-1 = 3.076(35) M-circle dot, M-2 = 2.306(35) M-circle dot, and R-1 = 2.711(55) R-circle dot, R-2 = 1.680(55) R-circle dot. For PT Vel the absolute dimensions were improved: M-1 = 2.204(25) M-circle dot, M-2 = 1.638(25) M-circle dot, and R-1 = 2.108(30) R-circle dot, R-2 = 1.605(30) R-circle dot. For GM Nor, the less accurate absolute parameters based on the light curve analysis were evaluated: M-1 = 1.94(15) M-circle dot, M-2 = 1.84(14) M-circle dot, and R-1 = 2.27(20) R-circle dot, R-2 = 2.25(20) R-circle dot. We found more precise and relatively short periods of apsidal motion of about 80, 335, and 160 years, along with the corresponding internal structure constants, log k(2), -2.524, -2.361, and -2.563, for GM Nor, V397 Pup, and PT Vel, respectively. Relativistic effects are small but not negligible, making up to 10% of the total apsidal motion rate in all systems. No marks of the presence of the third body were revealed in the light curves, on the O - C diagrams, or in the reduced spectra of the eccentric systems studied here.

Links

90232, large research infrastructures

Name: AUGER-CZ III

Cite

WOLF, Marek; Petr ZASCHE; J. KARA; Miloslav ZEJDA; Jan JANÍK; M. MAŠEK; M. LEHKY; J. MERC; Anna RICHTERKOVÁ; Dalibor HANŽL; Zdeněk MIKULÁŠEK; S. N. DE VILLIERS and Jiří LIŠKA. Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel. Astronomy and Astrophysics. EDP Sciences, 2024, vol. 690, A231, p. 1-10. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/202450303.

@article{2451323,
   author = {Wolf, Marek and Zasche, Petr and Kara, J. and Zejda, Miloslav and Janík, Jan and Mašek, M. and Lehky, M. and Merc, J. and Richterková, Anna and Hanžl, Dalibor and Mikulášek, Zdeněk and de Villiers, S. N. and Liška, Jiří},
   article_number = {A231},
   doi = {http://dx.doi.org/10.1051/0004-6361/202450303},
   keywords = {binaries: eclipsing; stars: early-type; stars: fundamental parameters; stars: individual: GM Nor; stars: individual: V397 Pup; stars: individual: PT Vel},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel},
   url = {https://www.aanda.org/articles/aa/pdf/2024/10/aa50303-24.pdf},
   volume = {690},
   year = {2024}
}

TY  - JOUR
ID  - 2451323
AU  - Wolf, Marek - Zasche, Petr - Kara, J. - Zejda, Miloslav - Janík, Jan - Mašek, M. - Lehky, M. - Merc, J. - Richterková, Anna - Hanžl, Dalibor - Mikulášek, Zdeněk - de Villiers, S. N. - Liška, Jiří
PY  - 2024
TI  - Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel
JF  - Astronomy and Astrophysics
VL  - 690
IS  - A231
SP  - 1-10
EP  - 1-10
PB  - EDP Sciences
SN  - 00046361
KW  - binaries: eclipsing
KW  - stars: early-type
KW  - stars: fundamental parameters
KW  - stars: individual: GM Nor
KW  - stars: individual: V397 Pup
KW  - stars: individual: PT Vel
UR  - https://www.aanda.org/articles/aa/pdf/2024/10/aa50303-24.pdf
N2  - The study of apsidal motion in eccentric eclipsing binaries provides an important observational test of theoretical models of stellar structure and evolution. New ground-based and space-based photometric data have been obtained and archival spectroscopic measurements were used in this study of three detached early-type and southern-hemisphere eccentric eclipsing binaries GM Nor (P = 1(d).88, e = 0.05), V397 Pup (3(d).00, 0.30), and PT Vel (1(d).80, 0.12). Their TESS observations in several sectors have also been included and the corresponding light curves were solved using the PHOEBE code. As a result, new accurate photoelectric times of minimum light have been obtained. The newly completed O - C diagrams were analyzed using all reliable timings found in the literature and calculated using the TESS light curves. New or improved values for the elements of apsidal motion were obtained. Using ESO archive spectroscopy, for V397 Pup, the precise absolute parameters were newly derived: M-1 = 3.076(35) M-circle dot, M-2 = 2.306(35) M-circle dot, and R-1 = 2.711(55) R-circle dot, R-2 = 1.680(55) R-circle dot. For PT Vel the absolute dimensions were improved: M-1 = 2.204(25) M-circle dot, M-2 = 1.638(25) M-circle dot, and R-1 = 2.108(30) R-circle dot, R-2 = 1.605(30) R-circle dot. For GM Nor, the less accurate absolute parameters based on the light curve analysis were evaluated: M-1 = 1.94(15) M-circle dot, M-2 = 1.84(14) M-circle dot, and R-1 = 2.27(20) R-circle dot, R-2 = 2.25(20) R-circle dot. We found more precise and relatively short periods of apsidal motion of about 80, 335, and 160 years, along with the corresponding internal structure constants, log k(2), -2.524, -2.361, and -2.563, for GM Nor, V397 Pup, and PT Vel, respectively. Relativistic effects are small but not negligible, making up to 10% of the total apsidal motion rate in all systems. No marks of the presence of the third body were revealed in the light curves, on the O - C diagrams, or in the reduced spectra of the eccentric systems studied here.
ER  -

WOLF, Marek; Petr ZASCHE; J. KARA; Miloslav ZEJDA; Jan JANÍK; M. MAŠEK; M. LEHKY; J. MERC; Anna RICHTERKOVÁ; Dalibor HANŽL; Zdeněk MIKULÁŠEK; S. N. DE VILLIERS and Jiří LIŠKA. Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel. \textit{Astronomy and Astrophysics}. EDP Sciences, 2024, vol.~690, A231, p.~1-10. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/202450303.

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