Chandra HETG Observations of the Transient Pulsar 2S 1845-024

Abstract:

2S 1845-024 is a transient Be/X-ray pulsar in a highly eccentric orbit, that has outburst every periastron passage for at least the last decade. Previous X-ray observations have shown that the outburst light-curves have an unusual structure. They begin prior to periastron passage with a short spike, which lasts 1-2 days. The flux on the tail of the spike reaches a minimum near periastron passage, and then rapidly rises into a more prolonged outburst, lasting 30-40 days. The initial spike has been interpreted as direct wind accretion of material from the Be star's equatorial disk during the pulsar's passage through it. The following outburst has been interpreted as due to accretion from a disk around the pulsar formed from higher angular momentum material stripped from the Be star disk.

Año de publicación:

2002

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Fuente:

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