Dust content of a hydrogen rich, low surface brightness galaxy and the luminosity history of 3C273

Details Dust content of a hydrogen rich, low surface brightness galaxy and the luminosity history of 3C273 Dust content of a hydrogen rich, low surface brightness galaxy and the luminosity history of 3C273

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993cuny.repts....h&link_type=abstract

Annual Status Report, 1 Sep. 1992 - 31 Aug. 1993 Columbia Univ., New York, NY. Depts. of Astronomy and Physics.

Astronomy and Astrophysics

Astronomy

Cosmic Dust, Dwarf Galaxies, Galactic Evolution, Hydrogen Clouds, X Ray Astronomy, X Ray Sources, Brightness, Emittance, Luminosity, X Ray Fluorescence

Scientific paper

This project consists of a 30,000 second PSPC observation of the Giovanelli-Haynes Cloud in an attempt to detect light emitted by 3C273 which has been reflected by the cloud, and incidentally search the cloud for other sources of X-ray emission. The observation was carried out by ROSAT on Dec. 25, 1992 and the data was received by the P.I. in late March of 1993. We have examined the data and determined that the observation's background level, astrometry, etc. are acceptable. We have also detected diffuse emission from the direction of the Giovanelli-Haynes Cloud. Determination of the origin of this emission, by examining its morphology in relation to that of the radio map and the object's geometric relation with 3C273, requires software implementation of specialized algorithms. However, the most dramatic observation in the field is a potentially new population of discrete soft X-ray sources associated with dwarf galaxies.

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