Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...611..353c&link_type=abstract
The Astrophysical Journal, Volume 611, Issue 1, pp. 353-359.
Astronomy and Astrophysics
Astronomy
6
Ism: Dust, Extinction, Ism: Abundances, Stars: Individual: Constellation Name: X Persei, Stars: Individual: Alphanumeric: 4U 0352+30, X-Rays: Ism, X-Rays: Stars
Scientific paper
We have observed the high-mass X-ray binary X Persei/4U 0352+30 with the Low Energy Transmission Grating Spectrometer (LETGS) aboard the Chandra X-Ray Observatory. We fit the spectrum near the oxygen K-shell absorption edge to determine the total (gas+dust) abundance of oxygen along this line of sight. Comparison with UV gas-phase measurements along this same line of sight gives an abundance of grain-bound oxygen which is in general agreement with published grain model fits to the observed extinction. No evidence is found for a significant reservoir of oxygen in large, previously undetected grains. We also attempt to extract and fit the radial profile of a halo of scattered X-rays in the zero-order image, but our efforts are hampered by grating artifacts and high detector background. We do not obtain useful results using standard models for dust scattering.
Cunningham Nathaniel J.
McCray Richard
Snow Theodore P.
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