Scattering by Interstellar Dust Grains. II. X-Rays

By B. Draine. 2003

356 citations recorded by the source corpus.

Scattering and absorption of X-rays by interstellar dust is calculated for a model consisting of carbonaceous grains and amorphous silicate grains. The calculations employ realistic dielectric functions with structure near X-ray absorption edges, with resulting features in absorption, scattering, and extinction. Differential scattering cross sections are calculated for energies between 0.3 and 10 keV. The median scattering angle is given as a function of energy, and simple but accurate approximations are found for the X-ray scattering properties of the dust mixture, as well as for the angular distribution of the scattered X-ray halo for dust with simple spatial distributions. Observational estimates of the X-ray scattering optical depth are compared to model predictions. Observations of X-ray halos to test interstellar dust grain models are best carried out using extragalactic point sources.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/876a51ca45ee11cd9092a9ad87dc3ef5710d8a68

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In Astronomy and Astrophysics

1. Simon Bruderer
2. Th. Henning
3. T. Birnstiel
4. C. Mordasini
5. E. F. Dishoeck
6. A. Bosman
7. A. Heays
8. E. Jenkins

In Nuclear and High Energy Physics

1. S. Hönig
2. M. Kishimoto
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5. A. Heays
6. E. Jenkins
7. J. Bernard
8. F. Boulanger

Citations in the corpus

• The dusty heart of nearby active galaxies. II. From clumpy torus models to physical properties of dust around active galactic nuclei (2009, methodology): “We used standard ISM compositions with Draine (2003) and Ossenkopf et al. (1992) silicates, respectively, and compared the cloud SEDs to simulations with a large grain composition and Graphite-dominated dust.”
• Scattering by Interstellar Dust Grains. I. Optical and Ultraviolet (2003, background): “The nature of interstellar grains remains uncertain (see Draine 2003a and references therein).”
• Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70 (2018, background): “The dust mixture is composed of 70% astronomical silicates (Draine 2003), and 30% amorphous carbon grains (Zubko et al. 1996).”
• Discovery of a warm, dusty giant planet around HIP 65426 (2017, methodology): “We use optical constant of astro-silicates ((Draine 2003)), and we compute the radiation pressure to gravitational forces β ratio as in Burns et al. (1979).”
• Photodissociation and photoionisation of atoms and molecules of astrophysical interest (2017, methodology): “These were taken from the mixed grain-size and composition model developed by Draine et al. (Draine & Lee 1984; Li & Draine 2001; Weingartner & Draine 2001; Draine 2003a,b,c).”
• The global dust SED: tracing the nature and evolution of dust with DustEM (2010, methodology): “Using the optical properties described in Draine (2003b)7, we derived the absorption and extinction efficiencies using Mie calculations.”
• A UNIFIED REPRESENTATION OF GAS-PHASE ELEMENT DEPLETIONS IN THE INTERSTELLAR MEDIUM (2009, background): “About twice this amount is needed to explain the dust extinction (Draine 2003a).”