2001A&A...379..540S


Query : 2001A&A...379..540S

2001A&A...379..540S - Astronomy and Astrophysics, volume 379, 540-550 (2001/11-4)

An XMM-Newton study of the X-ray binary MXB 1659-298 and the discovery of narrow X-ray absorption lines.

SIDOLI L., OOSTERBROEK T., PARMAR A.N., LUMB D. and ERD C.

Abstract (from CDS):

We report the discovery of narrow X-ray absorption lines from the low-mass X-ray binary MXB 1659-298 during an XMM-Newton observation in 2001 February. The 7.1hr orbital cycle is clearly evident with narrow X-ray eclipses preceded by intense dipping activity. A sinusoid-like OM B-band modulation with a peak-to-peak modulation of ∼0.5mag and a minimum coincident with the X-ray eclipse is visible. EPIC and RGS spectra reveal the presence of narrow resonant absorption features identified with O VIII 1s-2p, 1s-3p and 1s-4p, Ne X 1s-2p, Fe XXV 1s-2p, and Fe XXVI 1s-2p transitions, together with a broad Fe emission feature at 6.47+0.18–0.14keV. The equivalent widths of the Fe absorption features show no obvious dependence on orbital phase, even during dipping intervals. The equivalent widths of the other features are consistent with having the same values during persistent and dipping intervals. Previously, the only X-ray binaries known to exhibit narrow X-ray absorption lines were two superluminal jet sources and it had been suggested that these features are related to the jet formation mechanism. This now appears unlikely, and instead their presence may be related to the viewing angle of the system. The MXB 1659-298 0.6-12keV continuum is modeled using absorbed cutoff power-law and blackbody components. During dips the blackbody is more strongly absorbed than the power-law. The spectral shape of the 3.6% of 0.5-10keV emission that remains during eclipses is consistent with that during non-dipping intervals.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - stars: individual: MXB 1659-298 - stars: neutron - X-rays: general

Simbad objects: 6

goto Full paper

goto View the references in ADS

Number of rows : 6
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* UY Vol LXB 07 48 33.71 -67 45 07.7 16.10 17.00 16.9 16.7 17.05 ~ 597 0
2 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1780 1
3 MXB 1658-298 LXB 17 02 06.54 -29 56 44.1 18.35 18.75 18.3     ~ 340 0
4 V* V5512 Sgr LXB 18 14 31.55 -17 09 26.7     12.73     K5III 369 0
5 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2433 0
6 V* V1405 Aql LXB 19 18 47.871 -05 14 17.09 20.90 21.40 21.0     ~ 456 0

To bookmark this query, right click on this link: simbad:objects in 2001A&A...379..540S and select 'bookmark this link' or equivalent in the popup menu


2022.05.24-17:55:50

© Université de Strasbourg/CNRS

    • Contact