Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..366..230w&link_type=abstract
Transiting Extrapolar Planets Workshop ASP Conference Series, Vol. 366, Proceedings of the conference held 25-28 September, 2006
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the first X-ray detection of the host star of a transiting extrasolar planet. The nearby star HD 189733 was detected in multiple archival observations made of the Dumbell Nebula (M 27) with the ROSAT X-ray observatory. The X-ray spectrum is consistent with coronal emission from the host star and the measured flux allows us to determine the X-ray irradiation of the close-in transiting planet. We find that HD 189733b is likely to be suffering significant mass loss. Preliminary analysis of an observation made during transit suggests that this evaporation may be visible as excess photoelectric absorption in soft X-rays during transit.
Briggs Kevin R.
Wheatley Peter J.
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