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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
IGR J16194-2810: A new symbiotic X-ray binary
Astronomy and Astrophysics, Volume 470, No. 1, Year 2007
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Description
We here report on the multiwavelength study which led us to the identification of X-ray source IGR J16194-2810 as a new Symbiotic X-ray Binary (SyXB), that is, a rare type of Low Mass X-ray Binary (LMXB) composed of a M-type giant and a compact object. Using the accurate X-ray position allowed by Swift/XRT data, we pinpointed the optical counterpart, a M2 III star. Besides, the combined use of the spectral information afforded by XRT and INTEGRAL/IBIS shows that the 0.5-200 keV spectrum of this source can be described with an absorbed Comptonization model, usually found in LMXBs and, in particular, in SyXBs. No long-term (days to months) periodicities are detected in the IBIS data. The time coverage afforded by XRT reveals shot-noise variability typical of accreting Galactic X-ray sources, but is not good enough to explore the presence of X-ray short-term (seconds to hours) oscillations in detail. By using the above information, we infer important parameters for this source such as its distance (∼3.7 kpc) and X-ray luminosity (∼1.4×1035 erg s-1 in the 0.5-200 keV band), and we give a description for this system (typical of SyXBs) in which a compact object (possibly a neutron star) accretes from the wind of its M-type giant companion. We also draw some comparisons between IGR J16194-2810 and other sources belonging to this subclass, finding that this object resembles SyXBs 4U 1700+24 and 4U 1954+31. © ESO 2007.
Authors & Co-Authors
Masetti, Nicola
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Landi, Raffaella
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Pretorius, Magaretha L.
United Kingdom, Southampton
University of Southampton
Sguera, Vito
United Kingdom, Southampton
University of Southampton
Bird, Antony J.
United Kingdom, Southampton
University of Southampton
Perri, Matteo
Italy, Frascati
Asi Science Data Center
Charles, Philip A.
South Africa, Cape Town
South African Astronomical Observatory
Kennea, Jamie A.
United States, University Park
Pennsylvania State University
Malizia, Angela
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Ubertini, Pietro
Italy, Rome
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Rome
Statistics
Citations: 75
Authors: 10
Affiliations: 6
Identifiers
Doi:
10.1051/0004-6361:20077509
ISSN:
00046361
e-ISSN:
14320746
Research Areas
Health System And Policy