Understanding the X-ray emission from the Homunculus Nebula

Details Understanding the X-ray emission from the Homunculus Nebula Understanding the X-ray emission from the Homunculus Nebula

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1368c&link_type=abstract

Chandra Proposal ID #04208155

Physics

Chandra Proposal Id #04208155

Scientific paper

An ACIS-S+HETGS observation of Eta Car (July 20 2003) during the star's X-ray minimum (when the intrinsically bright stellar source is hidden from view) discovered surprisingly hard X-ray emission from the homunculus, the massive bipolar nebula ejected from the star during the Great Eruption. The origin of this emission is unknown. Two alternatives: the emission might be hot (50 MK) gas filling the spherical lobes of the nebula (the emission should be constant and may be important in the future dynamical evolution of the nebula) or it could be scattered radiation from the strong stellar source (the emission should vary with the stellar flux, but with light travel time delays). To distinguish between these alternatives we request a short ACIS-S observation without the gratings. This observation must take place before the end of the X-ray minimum, since outside minimum the stellar emission is so bright that the nebular emission is mostly hidden in the wings of the stellar psf.

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