2008ApJ...689L.129C

Query : 2008ApJ...689L.129C

2008ApJ...689L.129C - Astrophys. J., 689, L129-L132 (2008/December-3)

XMM-Newton observations of IGR J00291+5934: signs of a thermal spectral component during quiescence.

CAMPANA S., STELLA L., ISRAEL G. and D'AVANZO P.

Abstract (from CDS):

We present X-ray observations of the transient accretion-powered millisecond pulsar IGR J00291+5934 during quiescence. IGR J00291+5934 is the first source among accretion-powered millisecond pulsars to show signs of a thermal component in its quiescent spectrum. Fitting this component with a neutron star atmosphere or a blackbody model we obtain soft temperatures (∼64 and ∼110 eV, respectively). As in other sources of this class a hard spectral component is also present, comprising more than 60% of the unabsorbed 0.5-10 keV flux. Interpreting the soft component as cooling emission from the neutron star, we can conclude that the compact object can be spun up to millisecond periods by accreting only ≲0.2 M☉.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - stars: individual (IGR J00291+5934) - Stars: Neutron

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 PSR B0021-72W Psr 00 24 06.0580 -72 04 49.088           ~ 87 1
3 V* V1037 Cas LXB 00 29 03.06 +59 34 19.0           ~ 283 1
4 V* V822 Cen LXB 14 58 21.9347842080 -31 40 07.515432768 11.95 12.85 12.8     K3-K7V 555 0
5 V* QX Nor LXB 16 12 43.0 -52 25 26           ~ 946 1
6 MXB 1658-298 LXB 17 02 06.54 -29 56 44.1 18.35 18.75 18.3     ~ 381 0
7 1H 1715-321 LXB 17 18 47.40 -32 10 40.0           ~ 81 0
8 4U 1730-22 LXB 17 33 57.00 -22 02 07.0           ~ 64 0
9 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 437 0
10 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
11 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
12 2S 1803-245 LXB 18 06 50.72 -24 35 28.6           ~ 84 0
13 SAX J1808.4-3658 LXB 18 08 27.58 -36 58 43.9           ~ 1051 0
14 V* V4722 Sgr LXB 18 10 44.47 -26 09 01.2   21.5     18.449 ~ 99 0
15 4U 1857+01 LXB 19 08 26.97 +00 10 07.7 20.50 21.00 20.5     ~ 132 0
16 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1186 1
17 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 154 0
18 V* V1727 Cyg LXB 21 31 26.2133156448 +47 17 24.512055396 16.75 17.05 16.4     ~ 250 0

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