2002A&A...386..910P


Query : 2002A&A...386..910P

2002A&A...386..910P - Astronomy and Astrophysics, volume 386, 910-915 (2002/5-2)

Discovery of narrow X-ray absorption features from the dipping low-mass X-ray binary X 1624-490 with XMM-Newton.

PARMAR A.N., OOSTERBROEK T., BOIRIN L. and LUMB D.

Abstract (from CDS):

We report the discovery of narrow X-ray absorption features from the dipping low-mass X-ray binary X 1624-490 during an XMM-Newton observation in 2001 February. The features are identified with the Kα absorption lines of Fexxv and Fexxvi and have energies of 6.72±0.03 keV and 7.00±0.02 keV and equivalent widths (EWs) of -7.5+1.7–6.3eV and -16.6+1.9–5.9eV, respectively. The EWs show no obvious dependence on orbital phase, except during a dip, and correspond to a column of γ1017.3 Fe atom/cm2. In addition, faint absorption features tentatively identified with NiXXVII Kα and FeXXVI Kβ may be present. A broad emission feature at 6.58+0.07–0.04keV with an EW of 78+19–6eV is also evident. This is probably the 6.4keV feature reported by earlier missions since fitting a single Gaussian to the entire Fe-K region gives an energy of 6.39+0.03–0.04keV. A deep absorption feature is present during the dip with an energy consistent with FeXXV Kα. This is the second dipping LMXRB source from which narrow Fe absorption features have been observed. Until recently 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. It now appears likely that ionized absorption features may be common characteristics of accreting systems with accretion disks.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - stars: individual: X 1624-490 - stars: neutron - X-rays: general

CDS comments: MXB 1658-298 misprint for MXB 1659-298(.)

Simbad objects: 6

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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 - 2021
#notes
1 V* UY Vol LXB 07 48 33.71 -67 45 07.7 16.10 17.00 16.9 16.7 17.05 ~ 589 0
2 4U 1624-49 LXB 16 28 05.5318316228 -49 12 40.011030945           ~ 211 0
3 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1759 1
4 MXB 1658-298 LXB 17 02 06.54 -29 56 44.1 18.35 18.75 18.3     ~ 337 0
5 V* V5512 Sgr LXB 18 14 31.55 -17 09 26.7     12.73     K5III 361 0
6 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2385 0

    Equat.    Gal    SGal    Ecl

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2021.07.26-20:55:39

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