2005A&A...432..235R


Query : 2005A&A...432..235R

2005A&A...432..235R - Astronomy and Astrophysics, volume 432, 235-247 (2005/3-2)

Unveiling the nature of the high energy source IGR J19140+0951.

RODRIGUEZ J., CABANAC C., HANNIKAINEN D.C., BECKMANN V., SHAW S.E. and SCHULTZ J.

Abstract (from CDS):

We report on high energy observations of IGR J19140+0951 performed with RXTE on three occasions in 2002, 2003 and 2004, and INTEGRAL during a very well sampled and unprecedented high energy coverage of this source from early-March to mid-May 2003. Our analysis shows that IGR J19140+0951 spends most of its time in a very low luminosity state, probably corresponding to the state observed with RXTE, and characterised by thermal Comptonisation. In some occasions we observe variations of the luminosity by a factor of about 10 during which the spectrum can show evidence for a thermal component, besides thermal Comptonisation by a hotter plasma than during the low luminosity state. The spectral parameters obtained from the spectral fits to the INTEGRAL and RXTE data strongly suggest that IGR J19140+0951 hosts a neutron star rather than a black hole. Very importantly, we observe variations of the absorption column density (with a value as high as ∼1023cm–2). Our spectral analysis also reveals a bright iron line detected with both RXTE/PCA and INTEGRAL/JEM-X, at different levels of luminosity. We discuss these results and the behaviour of IGR J19140+0951, and show, by comparison with other well known systems (Vela X-1, GX 301-2, 4U 2206+54), that IGR J19140+0951 is most probably a High Mass X-ray Binary.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: individual: IGR J19140+0951 - accretion, accretion disks - gamma-rays: observations

Simbad objects: 11

goto Full paper

goto View the references in ADS

Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* GP Vel HXB 09 02 06.8608812864 -40 33 16.899168060 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1435 0
2 V* BP Cru HXB 12 26 37.5605188992 -62 46 13.261044684   12.70 10.66     B1.5Iaeq 643 0
3 3FHL J1633.0-4746e HXB 16 32 01.87 -47 52 28.3           O8I 164 3
4 HD 153919 HXB 17 03 56.7725629224 -37 50 38.913331452 6.06 6.78 6.51 6.08 5.90 O6Iafcp 784 1
5 3FHL J1746.2-2852 LXB 17 44 33.09 -28 44 27.0           ~ 514 0
6 [KRL2007b] 353 HXB 19 08 53.080 +09 23 04.84     15.80     ~ 101 0
7 4U 1908+075 HXB 19 10 48.2133201408 +07 35 51.707133960           O7.5-9.5sg 111 0
8 EXO 1912+097 X 19 14 +09.8           ~ 10 0
9 INTEGRAL1 111 HXB 19 14 04.2271468632 +09 52 58.399995144   18.6 16.4     B0.5I 91 0
10 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2462 0
11 BD+53 2790 HXB 22 07 56.2366802328 +54 31 06.408879888 9.4 10.11 9.84 9.64 9.43 O9.5Vep 188 0

To bookmark this query, right click on this link: simbad:objects in 2005A&A...432..235R and select 'bookmark this link' or equivalent in the popup menu


2022.09.27-04:18:34

© Université de Strasbourg/CNRS

    • Contact