Burst Oscillations: A New Spin on Neutron Stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

High frequency X-ray brightness oscillations during thermonuclear X-ray bursts, ``burst oscillations,'' were discovered with NASA's Rossi X-ray Timing Explorer (RXTE) in early 1996. Since then the phenomenon has been observed in 10 different low mass X-ray binary (LMXB) systems. Substantial evidence supports the conclusion that these oscillations are caused by rotational modulation of the burst emission and that they reveal the spin frequency of neutron stars in LMXBs, a long sought goal of X-ray astronomy. I will summarize our current state of knowledge regarding burst oscillations with a focus on recent developments and how detailed studies of their properties provide new probes of neutron stars and the nature of thermonuclear burning on them.

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