Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5347
Title: New measurements of orbital period change in Cygnus X-3
Authors: Singh, N.S.
Naik, S.
Paul, Biswajit
Agrawal, P.C.
Rao, A.R.
Singh, K.Y.
Keywords: stars
binaries
Cygnus X-3
Wolf-Rayet
X-ray
Issue Date: Sep-2002
Publisher: Springer Verlag
Citation: Astronomy and Astrophysics, 2002, Vol.392, p161-167
Abstract: The nonlinear nature of the binary ephemeris of Cygnus X-3 indicates either a change in the orbital period or an apsidal motion of the orbit. We have made extended observations of Cygnus X-3 with the Pointed Proportional Counters (PPCs) of the Indian X-ray Astronomy Experiment (IXAE) during 1999 July 3−13 and October 11−14. Using the data from these observations and the archival data from ROSAT, ASCA, BeppoSAX and RXTE, we have extended the database for this source. Adding these new arrival time measurements to the published results, we make a comparison between the various possibilities, (a) orbital decay due to mass loss from the system, (b) mass transfer between the stars, and (c) apsidal motion of the orbit due to gravitational interaction between the two components. The orbital decay due to mass loss from the companion star seems to be the most probable scenario
Description: Restricted Access.
URI: http://hdl.handle.net/2289/5347
ISSN: 0004-6361
1432-0746(Online)
Alternative Location: http://adsabs.harvard.edu/abs/2002A%26A...392..161S
http://arxiv.org/abs/astro-ph/0206134
http://dx.doi.org/10.1051/0004-6361:20020923
Copyright: 2002, Springer Verlag
Appears in Collections:Research Papers (A&A)

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