Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-20
Mon.Not.Roy.Astron.Soc.337:369,2002
Astronomy and Astrophysics
Astrophysics
16 pages, 16 figures and 3 tables included, figures and text updated, same results as in the 1st version, accepted in MNRAS
Scientific paper
10.1046/j.1365-8711.2002.05919.x
We describe ISAAC/ESO-VLT observations of the Ha(6563) Balmer line of 33 field galaxies from the Canada-France Redshift Survey (CFRS) with redshifts selected between 0.5 and 1.1. We detect Ha in emission in 30 galaxies and compare the properties of this sample with the low-redshift sample of CFRS galaxies at z~0.2 (Tresse & Maddox 1998). We find that the Ha luminosity, L(Ha), is tightly correlated to M(B(AB)) in the same way for both the low- and high-redshift samples. L(Ha) is also correlated to L([OII]3727), and again the relation appears to be similar at low and high redshifts. The ratio L([OII])/L(Ha) decreases for brighter galaxies by as much as a factor 2 on average. Derived from the Ha luminosity function, the comoving Ha luminosity density increases by a factor 12 from
Cuby Jean Gabriel
Le Fèvre Oliver
Maddox Steve J.
Tresse Laurence
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