Absolute properties of the oscillating eclipsing Algol XZ Ursae Majoris

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10491336" target="_blank" >RIV/00216208:11320/24:10491336 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lDC_.RZRG8" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lDC_.RZRG8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/pasj/psad085" target="_blank" >10.1093/pasj/psad085</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Absolute properties of the oscillating eclipsing Algol XZ Ursae Majoris

Popis výsledku v původním jazyce

It is known from archival TESS data that the semi-detached Algol system XZ Ursae Majoris (UMa) is one of the candidate binary stars exhibiting short-period oscillations. We secured new high-resolution spectroscopic observations for the program target to better understand its binary and pulsation properties. From the echelle spectra, the radial velocities (RVs) of the eclipsing pair were derived, and the atmosphere parameters of the primary component were measured to be v(A)sin i = 80 +/- 7 km s(-1), T-eff,T- A = 7940 +/- 120 K, and [M/H] = -0.15 +/- 0.20. The combined solution of our double-lined RVs and the TESS data provides robust physical parameters for XZ UMa with mass and radius measurement precision of better than 2%. The outside-eclipse residuals from a mean light curve in the 0.002 phase bin were used for multifrequency analyses, and we extracted 32 significant frequencies (22 in &lt;5.0 d(-1) and 10 in 39-52 d(-1)). The low frequencies may be mostly aliasing sidelobes, while six of the high frequencies may be pulsation signals arising from the detached primary located inside the delta Sct domain. Their periods, pulsation constants, and pulsational-orbital-period ratios indicate that the mass-accreting primary star is a delta Sct pulsator and, hence, XZ UMa is an oscillating eclipsing Algol.

Název v anglickém jazyce

Absolute properties of the oscillating eclipsing Algol XZ Ursae Majoris

Popis výsledku anglicky

It is known from archival TESS data that the semi-detached Algol system XZ Ursae Majoris (UMa) is one of the candidate binary stars exhibiting short-period oscillations. We secured new high-resolution spectroscopic observations for the program target to better understand its binary and pulsation properties. From the echelle spectra, the radial velocities (RVs) of the eclipsing pair were derived, and the atmosphere parameters of the primary component were measured to be v(A)sin i = 80 +/- 7 km s(-1), T-eff,T- A = 7940 +/- 120 K, and [M/H] = -0.15 +/- 0.20. The combined solution of our double-lined RVs and the TESS data provides robust physical parameters for XZ UMa with mass and radius measurement precision of better than 2%. The outside-eclipse residuals from a mean light curve in the 0.002 phase bin were used for multifrequency analyses, and we extracted 32 significant frequencies (22 in &lt;5.0 d(-1) and 10 in 39-52 d(-1)). The low frequencies may be mostly aliasing sidelobes, while six of the high frequencies may be pulsation signals arising from the detached primary located inside the delta Sct domain. Their periods, pulsation constants, and pulsational-orbital-period ratios indicate that the mass-accreting primary star is a delta Sct pulsator and, hence, XZ UMa is an oscillating eclipsing Algol.

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

2024

Kód důvěrnosti údajů

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

Název periodika

Publication of the Astronomical Society of Japan

ISSN

0004-6264

e-ISSN

2053-051X

Svazek periodika

76

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

12

Strana od-do

118-129

Kód UT WoS článku

001150803100001

EID výsledku v databázi Scopus

2-s2.0-85185157465