Discovery of Extended X-ray Emission around Adara

Details Discovery of Extended X-ray Emission around Adara Discovery of Extended X-ray Emission around Adara

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.2913h&link_type=abstract

American Astronomical Society, HEAD meeting #10, #29.13

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Scientific paper

Adara (epsilon Canis Majoris) is a nearby (130 pc) B-type supergiant (B2 II) binary system. It in a direction of very low neutral column density and is a very bright UV and EUV source. It has been considered to be a dominant source of ionizing radiation in the Solar neighborhood. In a long (140 ks) Chandra observation with the Low Energy Transmission Grating Spectrometer (LETGS), we found an unusual feature which extends to about 5 arcsec from the star that is spectrally confined to the 20-30 A region. We confirmed that the LETGS data of other stars (from both zero order and dispersed X-rays) do not show such a feature. We will show the spatial and spectral data and discuss possible physical interpretation of the extended emission region.
This work was supported by NASA through the Smithsonian Astrophysical Observatory (SAO) contract SV3-73016 for the Chandra X-Ray Center and Science Instruments.

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