Galaxy formation and evolution

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Circumnuclear Keplerian disks in galaxies

ASTR SOC P 182 (1999) 229-230

Authors:

JG Funes, F Bertola, M Cappellari, EM Corsini, A Pizzella, JCV Beltran

Clustering in the VIRMOS survey: Expected cosmic errors

ASTR SOC P 200 (1999) 153-157

Authors:

S Colombi, S Charlot, JEG Devriendt

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

Authors:

J Magorrian, D Ballantyne

Galactic bulges from Hubble Space Telescope NICMOS observations:: ages and dust

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 310:3 (1999) 703-716

Authors:

RF Peletier, M Balcells, RL Davies, Y Andredakis, A Vazdekis, A Burkert, F Prada

Ground-based detection of circumnuclear Keplerian disks of ionized gas in early-type disk galaxies

(1999) 232-236

Authors:

JG Funes, F Bertola, M Cappellari, EM Corsini, A Pizzella, JCV Beltran

Abstract:

We demonstrate the possibility of detecting mass concentrations (down to the level of 5 x 10(7) M.) in the center of galaxies with ground-based optical telescopes properly equipped, using Keplerian gaseous disks as probes. We predict that the high spatial resolution of HST equipped with STIS will allow to detect central mass concentrations down to the level of 5 x 10(6) M.. As a consequence, the detection of low mass concentrations in the range 10(6) - 10(7) M. will constitute a very appropriate use of HST.