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Title: Orbital evolution studies of two HMXB pulsars
Authors: Raichur, Harsha
Paul, Biswajit
Naik, S.
Bhatt, N.
Issue Date: Jan-2006
Publisher: Elsevier B.V.
Citation: Advances in Space Research, 2006, Vol. 38, p2785-2787
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.
Description: Restricted Access
ISSN: 0273-1177
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Copyright: 2006 Elsevier B.V.
Appears in Collections:Research Papers (A&A)

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