Measuring the Dust Grains and Distance to X Persei Via Its X-ray Halo

Details Measuring the Dust Grains and Distance to X Persei Via Its X-ray Halo Measuring the Dust Grains and Distance to X Persei Via Its X-ray Halo

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2271s&link_type=abstract

Chandra Proposal ID #08910631

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Chandra Proposal Id #08910631

Scientific paper

We propose to observe the X-ray halo of the high mass X-ray binary pulsar X Per to measure interstellar dust grains along the line of sight (LOS) and to determine the distance to X Per. The X-ray halo is formed by scattering from grains along the LOS, which for X Per appear to be concentrated in one molecular cloud. Unlike many other X-ray halo observations, this low-absorption high-latitude sightline is well-characterized from absorption spectroscopy done with HST, Copernicus, and FUSE. This halo observation will measure the distance to the cloud and the dust size distribution in it. We will also be able to determine the distance to X Per by measuring the time delayed pulses in the X-ray halo.

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