Broad forbidden Ne III line emission and intermediate-density gas around QSO nuclei

• Published in: Publications of the Astronomical Society of the Pacific Vol. 102; p. 497
• Main Authors: Zheng, Wei, Burbridge, E. Margaret, Smith, Harding E.
• Format: Journal Article
• Language: English
• Published: Legacy CDMS 01.05.1990
• Subjects: Astrophysics; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC GASES; COSMIC RADIO SOURCES; DENSITY; ELEMENTS; EMISSION SPECTRA; ENERGY-LEVEL TRANSITIONS; FLUIDS; FLUX DENSITY; FORBIDDEN TRANSITIONS; GALAXY NUCLEI; GASES; INTERSTELLAR SPACE; IONIZED GASES; LINE WIDTHS; NEON; NONMETALS; PHYSICAL PROPERTIES; QUASARS; RADIATION PRESSURE; RARE GASES; SPACE; SPECTRA 640102 > Astrophysics & Cosmology > Stars & Quasi-Stellar, Radio & X-Ray Sources; VELOCITY

A broad emission feature, with a velocity width of the order of 5000 km/s, has been observed near rest wavelength 3870 A in the spectra of three low-redshift QSOs. The line is identified as forbidden Ne III 3869. This broad line may have varied over a time scale of two years, indicating that clouds...