A search with a fiber-optic array for emission near QSO absorbers

Details A search with a fiber-optic array for emission near QSO absorbers A search with a fiber-optic array for emission near QSO absorbers

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...352..413y&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 352, April 1, 1990, p. 413-422. Research supported by Lowell Observatory, A

Physics

Optics

4

Astronomical Observatories, Galactic Evolution, Galactic Nuclei, Galactic Structure, Quasars, Absorption Spectra, Emission Spectra, Fiber Optics, Hubble Space Telescope, Red Shift

Scientific paper

Simultaneous 7-A resolution spectra covering 1370 A of 46 adjacent patches of the sky toward QSOs with known absorption-line features were obtained with an array of optical fibers. The observations are part of a program using QSO absorbers as flags to determine the properties of extended star formation at low redshifts. Limits of 5 x 10 to the -17th ergs/sq cm s are placed on point source forbidden O II emission near two strong Mg II quasar absorbers: the z = 0.6295 system of Q1209 + 108 and the z = 0.606 Q0843 + 136 system. The results suggest that overlapping halos of galaxies in moderately rich clusters (Abell richness class 0 or greater) are unlikely to account for most Mg II absorption lines with large velocity spread observed in QSO data.

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