Intrinsic polarization of Wolf-Rayet stars due to the rotational modulation of the stellar wind

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00138828" target="_blank" >RIV/00216224:14310/22:00138828 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1017/S1743921322002241" target="_blank" >http://dx.doi.org/10.1017/S1743921322002241</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S1743921322002241" target="_blank" >10.1017/S1743921322002241</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Intrinsic polarization of Wolf-Rayet stars due to the rotational modulation of the stellar wind

Popis výsledku v původním jazyce

Wolf-Rayet stars are regarded as candidates for progenitors of core-collapse supernovae, and they are expected to be progenitors of long gamma-ray bursts. These types of stars are considered to be fast rotators. Their high rotation speed breaks the sphericity of the star and leads to an axisymmetric wind density structure. In such a case, the electron scattering takes place in a nonspherical environment, and as a result, we might expect an intrinsic polarization. We present a 2.5D radiation hydrodynamic stellar wind model of these stars. The model simulations account for the deformation of the stellar surface due to rotation, gravity darkening, and nonradial forces. We computed the polarization from the density variable of the hydrodynamic model, derived the upper limit of rotational velocities, and found no conflict with the previous studies of Wolf-Rayet stars.

Název v anglickém jazyce

Intrinsic polarization of Wolf-Rayet stars due to the rotational modulation of the stellar wind

Popis výsledku anglicky

Wolf-Rayet stars are regarded as candidates for progenitors of core-collapse supernovae, and they are expected to be progenitors of long gamma-ray bursts. These types of stars are considered to be fast rotators. Their high rotation speed breaks the sphericity of the star and leads to an axisymmetric wind density structure. In such a case, the electron scattering takes place in a nonspherical environment, and as a result, we might expect an intrinsic polarization. We present a 2.5D radiation hydrodynamic stellar wind model of these stars. The model simulations account for the deformation of the stellar surface due to rotation, gravity darkening, and nonradial forces. We computed the polarization from the density variable of the hydrodynamic model, derived the upper limit of rotational velocities, and found no conflict with the previous studies of Wolf-Rayet stars.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far

ISBN

—

ISSN

1743-9213

e-ISSN

—

Počet stran výsledku

3

Strana od-do

490-492

Název nakladatele

Cambridge University Press

Místo vydání

Cambridge University Press

Místo konání akce

Cambridge University Press

Datum konání akce

1. 1. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—