Optical And Uv Light Curves Of The Accretion Disk Corona Source 4U 1822-371

Date

2008-05

Authors

Bayless, A. J.
Robinson, E. L.
Cornell, M. E.
Hynes, R. I.
Ashcraft, T. A.

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Abstract

The eclipsing low-mass X-ray binary 4U 1822-371 is the prototypical accretion disk corona (ADC) system. We have obtained new time-resolved UV spectrograms of 4U 1822-371 with the Hubble Space Telescope and new V- and J-band light curves with the 1.3-m SMARTS telescope at CTIO. We present an updated ephemeris for the times of the optical/UV eclipses. Model light curves do not give acceptable fits to the UV eclipses unless the models include an optically-thick ADC.

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Citation

Amanda J. Bayless, Edward L. Robinson, Mark E. Cornell, Robert I. Hynes, and Teresa A. Ashcraft. AIP Conference Proceedings 1010, 174 (May., 2008); doi: 10.1063/1.2945031