Author: Silas Laycock

0000000000225707

AUTHOR

Silas Laycock

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A Decade in the Life of EXO 2030+375: A Multiwavelength Study of an Accreting X‐Ray Pulsar

2002

Using BATSE and RXTE observations from 1991 April to 2001 August we have detected 71 outbursts from 82 periastron passages of EXO 2030+375, a 42-second transient X-ray pulsar with a Be star companion, including several outbursts from 1993 August to 1996 April when the source was previously believed to be quiescent. Combining BATSE, RXTE, and EXOSAT data we have derived an improved orbital solution. Applying this solution results in a smooth profile for the spin-up rate during the giant outburst and results in evidence for a correlation between the spin-up rate and observed flux in the brighter BATSE outbursts. Infrared and Halpha measurements show a decline in the density of the circumstell…

PhysicsBe starOscillationAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Phase (waves)FOS: Physical sciencesFluxAstronomy and AstrophysicsMulti wavelengthAstrophysicsAstrophysicsAccretion discPulsarSpace and Planetary ScienceAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics::Galaxy AstrophysicsX-ray pulsarThe Astrophysical Journal

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