J 2012

Eddington capture sphere around luminous stars

ABRAMOWICZ, Marek and A. STAH

Basic information

Original name

Eddington capture sphere around luminous stars

Authors

ABRAMOWICZ, Marek and A. STAH

Edition

Astronomy & Astrophysics, FR - Francouzská republika, 2012, 0004-6361

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

www

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.1051/0004-6361/201220187

UT WoS

000310349100054

Keywords in English

Accretion; Accretion disks; Stars: neutron; Radiation mechanisms: general; Relativistic processes

Tags

UF

Tags

International impact, Reviewed

Links

MSM4781305903, plan (intention).
Změněno: 8/12/2020 12:20, Mgr. Pavlína Jalůvková

Abstract

V originále

Test particles infalling from infinity onto a compact spherical star with a mildly super-Eddington luminosity at its surface are typically trapped on the "Eddington capture sphere" and do not reach the surface of the star. The presence of a sphere on which radiation pressure balances gravity for static particles was first discovered some twenty five years ago. Subsequently, it was shown to be a capture sphere for particles in radial motion, and more recently also for particles in non-radial motion, in which the Poynting-Robertson radiation drag efficiently removes the orbital angular momentum of the particles, reducing it to zero. Here we develop this idea further, showing that "levitation" on the Eddington sphere (above the stellar surface) is a stateof stable equilibrium, and discuss its implications for Hoyle-Lyttleton accretion onto a luminous star. When the Eddington sphere is present, the cross-section of a compact star for actual accretion is typically less than the geometrical
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