European Southern Observatory

European Southern Observatory, Karl-Schwarzschild-Str. 2

These determinations confirm that the system has remarkable properties with the lowest metallicity, a very low H 2 molecular fraction and it has no detectable presence of dust. The [α/F e − peak] ratio is ≈ 0.1, challenging current models of chemical evolution. The O/Ar and O/S ratios are the same as those observed in BCGs, suggesting a universal IMF. 1 Chemical abundances UVES observations of ...

European Ultraviolet-visible Observatory

Observatory of European SMEs 2002

The Mid-Infrared Luminosity Function of Galaxies in the European Large Area Infrared Space Observatory Survey Southern Fields

We present the first determination of the 15 m luminosity function of galaxies from the European Large Area ISO Survey (ELAIS) southern fields. We have adopted a new criterion to separate the quiescent, nonevolving and the starburst, evolving populations based on the ratio of mid-infrared to optical luminosity. Strong evolution is suggested by our data for the starburst galaxy population, while...

European Southern Observatory Very Large Telescope Optical Spectroscopy of Bl Lacertae Objects. Iii. an Extension of the Sample

We present results of an ongoing program at the European Southern Observatory Very Large Telescope for spectroscopy of BL Lac objects (BLLs) lacking a firm redshift estimate, and here we report on 15 objects. For 11 sources we confirm the BL Lac classification, and determine new redshifts for three objects, one with weak emission lines (PKS 1057− 79, z = 0.569) and two with absorptions from the...