A luminous recurrent supersoft X-ray source in NGC 300

被引：35

作者：

Kong, AKH

Di Stefano, R

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Tufts Univ, Dept Phys & Astron, Medford, MA 02155 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 590卷 / 01期

关键词：

galaxies : individual (NGC 300); X-rays : binaries; X-rays : galaxies;

D O I：

10.1086/376552

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the results of XMM-Newton observations for an especially luminous supersoft X-ray source (SSS) with a bolometric luminosity of 10(39) ergs s(-1) in the spiral galaxy NGC 300. The source was detected as an SSS in 1992 and disappeared in subsequent X-ray observations. The source was active again during recent XMM-Newton observations. It appeared to be very soft (kT similar to 60 eV) and very luminous (similar to10(38)-10(39) ergs s(-1)). The two XMM-Newton observations also reveal that the source went from a "high" state to a "low" state in 6 days. We also found a 5.4 hr periodicity during the low state. We consider white dwarf, black hole, and neutron star models in order to explain the nature of the source.

引用

页码：L13 / L16

页数：4

共 25 条

[1] Identification of supernova remnants in the sculptor group galaxies NGC 300 and NGC 7793 [J].

Blair, WP ;

Long, KS .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1997, 108 (01) :261-&

[2]

DEHARVENG L, 1988, ASTRON ASTROPHYS SUP, V73, P407

[3] Bright X-ray sources in M31 globular clusters [J].

Di Stefano, R ;

Kong, AKH ;

Garcia, MR ;

Barmby, P ;

Greiner, J ;

Murray, SS ;

Primini, FA .

ASTROPHYSICAL JOURNAL, 2002, 570 (02) :618-636

[4]

DISTEFANO R, 2002, APS APR M APR02

[5]

DISTEFANO R, 2003, IN PRESS APJ

[6]

Frank J., 2002, Accretion Power in Astrophysics, VThird

[7] Final results from the Hubble Space Telescope key project to measure the Hubble constant [J].

Freedman, WL ;

Madore, BF ;

Gibson, BK ;

Ferrarese, L ;

Kelson, DD ;

Sakai, S ;

Mould, JR ;

Kennicutt, RC ;

Ford, HC ;

Graham, JA ;

Huchra, JP ;

Hughes, SMG ;

Illingworth, GD ;

Macri, LM ;

Stetson, PB .

ASTROPHYSICAL JOURNAL, 2001, 553 (01) :47-72

[8]

Greiner J, 2000, NEW ASTRON, V5, P137, DOI 10.1016/S1384-1076(00)00018-X

[9] Chandra observations of the recurrent nova CI Aquilae after its 2000 April outburst [J].

Greiner, J ;

Di Stefano, R .

ASTROPHYSICAL JOURNAL, 2002, 578 (01) :L59-L62

[10]

Kahabka P, 1996, ASTRON ASTROPHYS, V306, P795

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