A serendipitous search for hy-redshift Lyα emission:: A case study of two sources at z ≃ 3
HY-REDSHIFT UNIVERSE: GALAXY FORMATION AND EVOLUTION AT HIGH REDSHIFT 193 (1999) 521-524
An ISO survey of PAH features in Ultraluminous Infrared Galaxies
ASTR SOC P 177 (1999) 171-174
Abstract:
We have obtained ISOPHOT-S low resolution mid-infrared spectra of a sample of 60 Ultraluminous Infrared Galaxies (ULIRGs). We use the strength of the 'PAH' mid-infrared features as a discriminator between starburst and AGN activity, and to probe for evolutionary effects. Observed ratios of PAH features in ULIRGs differ slightly from those in lower luminosity starbursts. We suggest that such PAH ratio changes relate to the conditions in the interstellar medium in these galaxies, and in particular to extinction.Circumnuclear Keplerian disks in galaxies
ASTR SOC P 182 (1999) 229-230
Clustering in the VIRMOS survey: Expected cosmic errors
ASTR SOC P 200 (1999) 153-157
Abstract:
We predict the errors on counts-in-cells statistics measured in the future VIRMOS survey. Several effects are included, such as variation of clustering, biasing, and geometry. Most importantly for the survey strategy, sparse sampling appears to have no particular advantage in this case, especially for higher order statistics at high redshift. The predicted accuracy is a few percent for the variance, and about 10 percent for the skewness at z = 1 in a small dynamic range around 1 h(-1) Mpc.Constraining the mass distributions of spherical galaxies
ASTR SOC P 182 (1999) 160-161