Observations of gas and dust at the Galactic Centre

Details Observations of gas and dust at the Galactic Centre Observations of gas and dust at the Galactic Centre

2003-11-27

arxiv.org/abs/astro-ph/0311611v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Infrared Space Observatory Long wavelength Spectrometerhas been used to map distribution of the emission from a sample of 22 atomic, molecular and ionised lines toward the Circumnuclear Disk at the Galactic Centre. The CND disc is clearly seen in the maps of molecular lines such as CO and OH, whilst the central region dominates in other atomic and ionised lines. The spectrum toward Sgr A star is best represented by the sum of a 58 K blackbody, superposed with 22 identifiable emission or absorption features, including four lines each attributed to CO and OH, two broad features that may be indicative of a complex of solid state features, two H2O lines, and the rest being various atomic or ionised atomic lines.

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