X-ray halos as diagnostics of interstellar grains

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170297· OSTI ID:5183360

Mathis, J S; Lee, C -W ^[1]

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1. Washburn Observatory, Madison, WI (United States)

Interstellar grains scatter X-rays from point sources into an observable halo surrounding the source image. Attention is presently given to the scattering of various grain-size distributions, both for halos around point sources and the cases of a source occulted by the moon. The limitations associated with using the X-ray halo to ascertain the size distribution of grains. The distribution of dust along the line-of-sight is noted to affect the inner part of the halo, rendering it more peaked toward the central point source if the dust is concentrated near the source. 30 refs.

• OSTI ID: 5183360
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 376; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC DUST
DIAGNOSTIC TECHNIQUES
DUSTS
ELECTROMAGNETIC RADIATION
IMAGES
INTERSTELLAR GRAINS
INTERSTELLAR SPACE
IONIZING RADIATIONS
PARTICLE SIZE
PARTICLES
POINT SOURCES
RADIATION SOURCES
RADIATIONS
SCATTERING
SIZE
SPACE
X RADIATION