Photometric Periodicities of Be/X-Ray Pulsars in the Small Magellanic Cloud
Abstract
Analysis of the long-term photometric variability of seven Be/X-ray pulsar systems in the Small Magellanic Cloud has been carried out. We find that a variety of types of variability are present, including long-term irregular changes, periodic orbital outbursts due to interaction between the stars (weeks to months), low-amplitude quasi-periodic variations of the equatorial disk (days), and nonradial pulsations of the Be primary star (hours).
This paper utilizes public domain data obtained by the MACHO Project, jointly funded by the US Department of Energy through the University of California, Lawrence Livermore National Laboratory, under contract W-7405-Eng-48, by the National Science Foundation through the Center for Particle Astrophysics of the University of California under cooperative agreement AST 88-09616, and by the Mount Stromlo and Siding Spring Observatory, part of the Australian National University.- Publication:
-
The Astronomical Journal
- Pub Date:
- November 2005
- DOI:
- 10.1086/491705
- arXiv:
- arXiv:astro-ph/0506728
- Bibcode:
- 2005AJ....130.2220S
- Keywords:
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- Stars: Pulsars: General;
- stars: individual (XMMU J004723.7-731226);
- stars: individual (RX J0049.1-7250);
- stars: individual (XTE J0052-725);
- stars: individual (RX J0050.7-7316);
- stars: individual (CXOU J005455.6-724510);
- stars: individual (RX J0054.9-7226);
- stars: individual (XMMU J005517.9-723853);
- Stars: Variables: Other;
- X-Rays: Binaries;
- Astrophysics
- E-Print:
- 27 pages, 15 figures