High-Resolution X-ray Images of Dust Halos

Details High-Resolution X-ray Images of Dust Halos High-Resolution X-ray Images of Dust Halos

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.2042s&link_type=abstract

Chandra Proposal ID #07910195

Physics

Chandra Proposal Id #07910195

Scientific paper

Measurements of X-ray halos will break the degeneracy that exists in dust models determined from infrared emission and UV/optical extinction measurements. This requires observations of bright halos within 1' of the source, as well as energy-resolved halos beyond 1'. The former can only be done with Chandra's HRC-I, while the ACIS-S is ideal for the latter. We have observed one source, GX13+1, with both detectors and proposed to extend our dataset with observations of GX5-1 and GX9+1. These are both bright, highly absorbed X-ray binaries. We present our AO6 data on GX13+1 which can reject at least one proposed model. Expending the dataset to three sources will substantially reduce the allowed range of dust parameters, shedding new light on the formation and dispersion of dust grains.

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