Observations of Eddington-limited type-I X-ray bursts from 4U 1812-12
Abstract
During more than 3 years (August 1996-October 1999) monitoring of a 40degr x 40degr sky region around the Galactic Centre by the Wide Field Cameras on board BeppoSAX, a total of 8 type-I bursts have been detected from a sky position consistent with that of 4U 1812-12, a likely neutron-star low-mass X-ray binary. We present the results of a detailed study of the bursts of 4U 1812-12, about 15 years after the last reported observations of X-ray bursts from this source (\cite{Mura83}). Clear evidence for photospheric radius expansion due to Eddington-limited burst luminosity is present in most of the observed events, allowing an accurate estimate of the source distance ( ~ 4 kpc) and its burst parameters.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2000
- DOI:
- 10.48550/arXiv.astro-ph/0003151
- arXiv:
- arXiv:astro-ph/0003151
- Bibcode:
- 2000A&A...357..527C
- Keywords:
-
- STARS: BINARIES: GENERAL;
- STARS: NOVAE;
- CATACLYSMIC VARIABLES;
- STARS: INDIVIDUAL: 4U 1812-12;
- X-RAYS: BURSTS;
- X-RAYS: STARS;
- Astrophysics
- E-Print:
- 6 pages, 3 figures, accepted for publication in A&