2005A&A...441..283T

Query : 2005A&A...441..283T

2005A&A...441..283T - Astronomy and Astrophysics, volume 441, 283 (2005/10-1)

Discovery of a redshifted X-ray emission line in the symbiotic neutron star binary 4U 1700+24.

TIENGO A., GALLOWAY D.K., DI SALVO T., MENDEZ M., MILLER J.M., SOKOLOSKI J.L. and VAN DER KLIS M.

Abstract (from CDS):

We present the spectral analysis of an XMM-Newton observation of the X-ray binary 4U 1700+24, performed during an outburst in August 2002. The EPIC-PN spectrum above 1keV can be modeled by a blackbody plus Comptonization model, as in previous observations. At lower energies, however, we detect a prominent soft excess, which we model with a broad Gaussian centered at ∼0.5keV. In the high resolution RGS spectrum we detect a single emission line, centered at 19.19^+0.05_–0.09Å. We discuss two possible interpretations for this line: O VIII at redshift z=0.012^+0.002_–0.004 or Ne IX at redshift z∼0.4.

Abstract Copyright: ∼

Journal keyword(s): X-rays: individuals: 4U 1700+24 - stars: neutron - stars: binaries: symbiotic - line: identification

Simbad objects: 3

Full paper

View the references in ADS

Number of rows : 3

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	~	600	0
2	V* V934 Her	LP*	17 06 34.5128222328	+23 58 18.639373836	11.20	9.16	7.62			M2III	129	0
3	V* V1521 Cyg	HXB	20 32 25.78	+40 57 27.9						WN4/5-6/7	1868	2

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