Discovery of Burst Oscillations in the Intermittent Accretion-Powered Millisecond Pulsar HETE J1900.1-2455
Abstract
We report the discovery of burst oscillations from the intermittent accretion-powered millisecond pulsar (AMP) HETE J1900.1-2455, with a frequency ~1 Hz below the known spin frequency. The burst oscillation properties are far more similar to those of the non-AMPs and Aql X-1 (an intermittent AMP with a far lower duty cycle), than those of the AMPs SAX J1808.4-3658 and XTE J1814-338. We discuss the implications for models of the burst oscillation and intermittency mechanisms.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2009
- DOI:
- 10.1088/0004-637X/698/2/L174
- arXiv:
- arXiv:0904.2383
- Bibcode:
- 2009ApJ...698L.174W
- Keywords:
-
- binaries: general;
- stars: individual: HETE J1900.1-2455;
- stars: neutron;
- stars: rotation;
- X-rays: bursts;
- X-rays: stars;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 4 pages, 4 figures, submitted to ApJ Letters