Orbital evolution studies of two HMXB pulsars

dc.contributor.author	Raichur, Harsha
dc.contributor.author	Paul, Biswajit
dc.contributor.author	Naik, S
dc.contributor.author	Bhatt, N
dc.date.accessioned	2012-07-17T04:24:23Z
dc.date.available	2012-07-17T04:24:23Z
dc.date.issued	2006-01
dc.description	Restricted Access	en
dc.description.abstract	High mass X-ray binary (HMXB) pulsars are of two types, persistent and transient. 4U1538-52 is a persistent HMXB whose orbit was previously measured to be circular but the RXTE observations revealed an eccentric orbit. We observed this system with RXTE-PCA in August 2003 and our timing analysis supports the eccentric orbit of the system. However, we do not find any evidence for orbital evolution. Rotational and tidal interactions between the stars of a closed binary system result in apsidal motion which can be measured in systems with eccentric orbit. 4U0115+63 is a Be-transient HMXB whose eccentric orbit was well-determined during its 1978 outburst. We report preliminary results from analysis of data obtained during the 1999 outburst of this source with the RXTE-PCA.	en
dc.identifier.citation	Advances in Space Research, 2006, Vol. 38, p2785-2787	en
dc.identifier.issn	0273-1177
dc.identifier.uri	http://hdl.handle.net/2289/4955
dc.language.iso	en	en
dc.publisher	Elsevier B.V.	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2006AdSpR..38.2785R	en
dc.relation.uri	http://dx.doi.org/10.1016/j.asr.2006.08.004	en
dc.rights	2006 Elsevier B.V.	en
dc.title	Orbital evolution studies of two HMXB pulsars	en
dc.type	Article	en

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