AAS 201st Meeting, January, 2003
Session 49. Eta Carinae, LBVs, and Circumstellar Disks
Poster, Tuesday, January 7, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[49.01] Recent X-ray Variability of Eta Car Approaching The X-ray Eclipse

M. Corcoran (USRA & GSFC-LHEA), J. H. Swank (GSFC-LHEA), K. Ishibashi (MIT), T. Gull (GSFC-LASP), R. Humphreys (U. Minn), A. Damineli (IAGUSP), N. Walborn (STScI), D. J. Hillier (U. Pitt), K. Davidson (UMinn.), S. M. White (UMD), R. Petre (GSFC-LHEA), J. Pittard (Leeds), Y. Butt (CfA), K. Verner (Catholic U.)

We discuss recent X-ray spectral variability of the supermassive star Eta Car in the interval since the last X-ray eclipse in 1998. We concentrate on the interval just prior to the next X-ray eclipse which is expected to occur in June 2003. We compare the X-ray behavior during the 2001-2003 cycle with the previous cycle (1996-1998) and note similarities and differences in the temporal X-ray behavior. We also compare a recent X-ray observation of Eta Car obtained with the Chandra high energy transmission grating in October 2002 with an earlier observation from Nov 2002, and interpret these results in terms of the proposed colliding wind binary model for the star. In addition we discuss planned observations for the upcoming X-ray eclipse.

If you would like more information about this abstract, please follow the link to http://lheawww.gsfc.nasa.gov/users/corcoran/eta_car/2003.5/. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: corcoran@barnegat.gsfc.nasa.gov

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.