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Astron. Astrophys. 321, 771-775 (1997)


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Emission line flux limits in four QSO metal line absorbers

Nils Bergvall 1, Göran Östlin 1, Karl Göran Karlsson 2, Eva Örndahl 1 and Jari Rönnback 1

1 Astronomiska observatoriet, Box 515, S-75120 Uppsala, Sweden
2 Mid Sweden University, S-87188 Härnösand, Sweden

Received 1 August 1996 / Accepted 15 November 1996

Abstract

In an effort to detect the early phases of star formation in massive galaxies, we have searched for Ly [FORMULA]   and [O II ] [FORMULA] 3727 emission from four QSO metal absorption line systems and possible associated galaxies, using narrow-band filters. None of the objects was detected. We discuss the possible effects of dust on the visibility of the objects and show that we can derive interesting upper limits on the star formation rates.

Key words: galaxies: evolution; formation; starburst – quasars: absorption lines

Send offprint requests to: N. Bergvall

© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998

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