Absolute Properties of the Oscillating Eclipsing Algol X Trianguli

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475210" target="_blank" >RIV/00216208:11320/23:10475210 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=EMoFLRI4d2" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=EMoFLRI4d2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/acbe9d" target="_blank" >10.3847/1538-3881/acbe9d</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Absolute Properties of the Oscillating Eclipsing Algol X Trianguli

Popis výsledku v původním jazyce

We report results from the TESS photometric data and new high-resolution spectra of the Algol system X Tri showing short-period pulsations. From the echelle spectra, the radial velocities of the eclipsing pair were measured, and the rotational rate and effective temperature of the primary star were obtained to be v (1)sini = 84 +/- 6 km s(-1) and T (eff,1) = 7900 +/- 110 K, respectively. The synthetic modeling of these observations implies that X Tri is in synchronous rotation and is physically linked to a visual companion TIC 28391715 at a separation of about 6.&apos;&apos; 5. The absolute parameters of our target star were accurately and directly determined to be M (1) = 2.137 +/- 0.018 M (circle dot), M (2) = 1.101 +/- 0.010 M (circle dot), R (1) = 1.664 +/- 0.010 R (circle dot), R (2) = 1.972 +/- 0.010 R (circle dot), L (1) = 9.67 +/- 0.55 L (circle dot), and L (2) = 2.16 +/- 0.09 L (circle dot). The phase-binned mean light curve was used to remove the binary effect from the observed TESS data. Multifrequency analysis of the residuals revealed 16 significant frequencies, of which the high-frequency signals between 37 day(-1) and 48 day(-1) can be considered probable pulsation modes. Their oscillation periods of 0.021-0.027 days and pulsation constants of 0.014-0.018 days are typical values of delta Sct variables. The overall results demonstrate that X Tri is an oEA star system consisting of a delta Sct primary and its lobe-filling companion in the semidetached configuration.

Název v anglickém jazyce

Absolute Properties of the Oscillating Eclipsing Algol X Trianguli

Popis výsledku anglicky

We report results from the TESS photometric data and new high-resolution spectra of the Algol system X Tri showing short-period pulsations. From the echelle spectra, the radial velocities of the eclipsing pair were measured, and the rotational rate and effective temperature of the primary star were obtained to be v (1)sini = 84 +/- 6 km s(-1) and T (eff,1) = 7900 +/- 110 K, respectively. The synthetic modeling of these observations implies that X Tri is in synchronous rotation and is physically linked to a visual companion TIC 28391715 at a separation of about 6.&apos;&apos; 5. The absolute parameters of our target star were accurately and directly determined to be M (1) = 2.137 +/- 0.018 M (circle dot), M (2) = 1.101 +/- 0.010 M (circle dot), R (1) = 1.664 +/- 0.010 R (circle dot), R (2) = 1.972 +/- 0.010 R (circle dot), L (1) = 9.67 +/- 0.55 L (circle dot), and L (2) = 2.16 +/- 0.09 L (circle dot). The phase-binned mean light curve was used to remove the binary effect from the observed TESS data. Multifrequency analysis of the residuals revealed 16 significant frequencies, of which the high-frequency signals between 37 day(-1) and 48 day(-1) can be considered probable pulsation modes. Their oscillation periods of 0.021-0.027 days and pulsation constants of 0.014-0.018 days are typical values of delta Sct variables. The overall results demonstrate that X Tri is an oEA star system consisting of a delta Sct primary and its lobe-filling companion in the semidetached configuration.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The Astronomical Journal

ISSN

0004-6256

e-ISSN

1538-3881

Svazek periodika

165

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

159

Kód UT WoS článku

000949717900001

EID výsledku v databázi Scopus

2-s2.0-85150494503