Discovery of burst oscillations in the intermittent accretion-powered millisecond pulsar HETE J1900.1-2455
Anna L. Watts, Diego Altamirano, Manuel Linares, Alessandro Patruno,, Piergiorgio Casella, Yuri Cavecchi, Nathalie Degenaar, Nanda Rea, Paolo, Soleri, Michiel van der Klis, Rudy Wijnands (University of Amsterdam)
TL;DR
This paper reports the discovery of burst oscillations in the intermittent millisecond pulsar HETE J1900.1-2455, revealing similarities to non-AMPs and impacting models of burst oscillation and intermittency.
Contribution
First detection of burst oscillations in HETE J1900.1-2455, providing new insights into burst oscillation behavior in intermittent accretion-powered millisecond pulsars.
Findings
Burst oscillations are ~1 Hz below the known spin frequency.
Oscillation properties resemble non-AMPs and Aql X-1.
Implications for models of burst oscillation and intermittency mechanisms.
Abstract
We report the discovery of burst oscillations from the intermittent accretion-powered millisecond pulsar (AMP) HETE J1900.1-2455, with a frequency approximately 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.
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