Quasi-periodic oscillations discovered in the new X-ray pulsar XTE J1858+034

Paul, Biswajit; Rao, A.R.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4913

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DC Field	Value	Language
dc.contributor.author	Paul, Biswajit	-
dc.contributor.author	Rao, A.R.	-
dc.date.accessioned	2012-07-14T10:01:13Z	-
dc.date.available	2012-07-14T10:01:13Z	-
dc.date.issued	1998-09	-
dc.identifier.citation	Astronomy and Astrophysics, 1998, Vol.337, p815-818	en
dc.identifier.issn	0004-6361	-
dc.identifier.uri	http://hdl.handle.net/2289/4913	-
dc.description	Open Access	en
dc.description.abstract	We report the discovery of low frequency quasi-periodic oscillations centered at 0.11 Hz in the newly discovered 221 s X-ray pulsar XTE J1858+034. Among about 30 known transient X-ray pulsars this is the sixth source in which QPOs have been observed. If the QPOs are produced because of inhomogeneities in the accretion disk at the magnetospheric boundary, the low frequency of the QPOs indicate a large magnetosphere for this pulsar. Both the Keplerian frequency model and the beat frequency model are applicable for production of QPOs in this source. The QPOs and regular pulsations are found to be stronger at higher energy which favours the beat frequency model. The magnetic field of the pulsar is calculated as a function of its distance. The energy spectrum is found to be very hard, consisting of two components, a cut-off power law and an iron fluorescence line.	en
dc.language.iso	en	en
dc.publisher	EDP Sciences	en
dc.relation.uri	http://adsabs.harvard.edu/abs/1998A%26A...337..815P	en
dc.relation.uri	http://arxiv.org/abs/astro-ph/9805366	en
dc.rights	1998 EDP Sciences	en
dc.title	Quasi-periodic oscillations discovered in the new X-ray pulsar XTE J1858+034	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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