VY Scl-type cataclysmic variable SDSS J154453.60+255348.8: stellar and disc parameters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475226" target="_blank" >RIV/00216208:11320/23:10475226 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.ZbGGjZ1cK" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.ZbGGjZ1cK</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stad881" target="_blank" >10.1093/mnras/stad881</a>

Jazyk výsledku

angličtina

Název v původním jazyce

VY Scl-type cataclysmic variable SDSS J154453.60+255348.8: stellar and disc parameters

Popis výsledku v původním jazyce

We present a new study of the eclipsing cataclysmic variable SDSS J154453.60+255348.8 to determine the object&apos;s nature and its system parameters together with the probe of the accretion flow structure in the system. Based on analyses of new simultaneous time-resolved photometric and spectroscopic observations of SDSS J154453.60+255348.8 and using our light-curve modelling techniques and the Doppler tomography method, we found that the system contains a white dwarf with the mass of M-WD = 0.62(7) M-circle dot and an evolved red dwarf as a secondary. The system inclination is close to 90 degrees and the mass ratio is q = 0.49(2). The secondary has an effective temperature T-2 = 3400(40) K and a radius about 1.35(15) times larger than a zero-age main-sequence star with similar mass. From observation of the system in high- and low-brightness states, we conclude that SDSS J154453.60+255348.8 is a long-orbital period VY Scl-type system. The accretion disc in the high state is about two times less than the truncation radius, and is completely missing during the low state of the system.

Název v anglickém jazyce

VY Scl-type cataclysmic variable SDSS J154453.60+255348.8: stellar and disc parameters

Popis výsledku anglicky

We present a new study of the eclipsing cataclysmic variable SDSS J154453.60+255348.8 to determine the object&apos;s nature and its system parameters together with the probe of the accretion flow structure in the system. Based on analyses of new simultaneous time-resolved photometric and spectroscopic observations of SDSS J154453.60+255348.8 and using our light-curve modelling techniques and the Doppler tomography method, we found that the system contains a white dwarf with the mass of M-WD = 0.62(7) M-circle dot and an evolved red dwarf as a secondary. The system inclination is close to 90 degrees and the mass ratio is q = 0.49(2). The secondary has an effective temperature T-2 = 3400(40) K and a radius about 1.35(15) times larger than a zero-age main-sequence star with similar mass. From observation of the system in high- and low-brightness states, we conclude that SDSS J154453.60+255348.8 is a long-orbital period VY Scl-type system. The accretion disc in the high state is about two times less than the truncation radius, and is completely missing during the low state of the system.

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

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

521

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

5846-5859

Kód UT WoS článku

001023517100070

EID výsledku v databázi Scopus

2-s2.0-85159858920