A search for quasars and emission-line galaxies in the Sculptor region

Details A search for quasars and emission-line galaxies in the Sculptor region A search for quasars and emission-line galaxies in the Sculptor region

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..761k&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, April 1986, p. 761-776.

Astronomy and Astrophysics

Astronomy

19

Astronomical Spectroscopy, Carbon Stars, Galactic Radiation, Quasars, Astronomical Catalogs, Data Sampling, Emission Spectra, Red Shift, Spiral Galaxies

Scientific paper

A spectroscopic survey of emission-line candidates found in three objective-prism plates has been carried out resulting in 76 quasars, 28 emission-line galaxies, and three carbon stars. No new dwarf emission-line galaxies have been found with heavy-element abundances comparable or less than that of I ZW 18, about 1/30 the solar value. No galaxy belongs to the nearby Sculptor Group. The new sample of quasars doubles the number of known quasars in this region. Eighty percent have redshifts larger than 1.6 and were found from their Ly-alpha line emission. A preliminary study shows that quasar clustering is absent on any scale from 10 to 3500 Mpc, although a further critical analysis of the clustering investigation techniques is needed before any firm conclusion can be reached.

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