Interstellar gas, molecules and dust in the X-ray spectrum of GS 1826-238

Details Interstellar gas, molecules and dust in the X-ray spectrum of GS 1826-238 Interstellar gas, molecules and dust in the X-ray spectrum of GS 1826-238

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..245p&link_type=abstract

X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer

Astronomy and Astrophysics

Astronomy

Interstellar Matter, X-Ray Spectra, Satellites, Artificial, Fine Structure, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, X-Ray, Artificial Earth Satellites, Fine And Hyperfine Structure

Scientific paper

The interstellar medium (ISM) has a multiphase structure characterized by gas, dust and molecules. It is possible to probe the ISM through observation of its absorption lines and edges in X-ray spectra of background sources. We present a high quality RGS spectrum of the low-mass X-ray binary (LMXB) GS 1826-238 with a detailed treatment of the absorption features due to both neutral and ionized gas and dust of the ISM. The presence of warm and hot gas is highlighted by the low and high ionization absorption lines of oxygen. The gas appears to be mostly neutral, as less than ~5% of it is ionized. At least 10% of oxygen appears to be bound in dust grains and molecules.

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