2014A&A...563A..70M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST07:18:54

2014A&A...563A..70M - Astronomy and Astrophysics, volume 563A, 70-70 (2014/3-1)

The accretion environment in Vela X-1 during a flaring period using XMM-Newton.

MARTINEZ-NUNEZ S., TORREJON J.M., KUEHNEL M., KRETSCHMAR P., STUHLINGER M., RODES-ROCA J.J., FUERST F., KREYKENBOHM I., MARTIN-CARRILLO A., POLLOCK A.M.T. and WILMS J.

Abstract (from CDS):

We present analysis of 100 ks contiguous XMM-Newton data of the prototypical wind accretor Vela X-1. The observation covered eclipse egress between orbital phases 0.134 and 0.265, during which a giant flare took place, enabling us to study the spectral properties both outside and during the flare. This giant flare with a peak luminosity of 3.92+0.42–0.09x1037erg/s allows estimates of the physical parameters of the accreted structure with a mass of ∼1021g. We have been able to model several contributions to the observed spectrum with a phenomenological model formed by three absorbed power laws plus three emission lines. After analysing the variations with orbital phase of the column density of each component, as well as those in the Fe and Ni fluorescence lines, we provide a physical interpretation for each spectral component. Meanwhile, the first two components are two aspects of the principal accretion component from the surface of the neutron star, the third component seems to be the X-ray light echo formed in the stellar wind of the companion.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - pulsars: individual: Vela X-1

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1373 0
2 V* V779 Cen HXB 11 21 15.0920367078 -60 37 25.627505233   14.4       O9III/Veq 994 0
3 V* QV Nor HXB 15 42 23.3633078550 -52 23 09.576918639   16.3 14.5     B0.2Ia:e 372 1
4 HD 153919 HXB 17 03 56.7728262865 -37 50 38.912077679 6.06 6.78 6.51 6.08 5.90 O6Iafcp 756 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-07:18:54

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