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The nature of red dwarf galaxies
Yu Wang, Xiaohu Yang, H. J. Mo +5
Using dark matter halos traced by galaxy groups selected from the Sloan Digital Sky Survey Data Release 4, we find that about 1/4 of the faint galaxies ($\rmag >-17.05$, hereafter…
The Correlation of Star Formation Quenching with Internal Galaxy Properties and Environment
Taysun Kimm, Rachel S. Somerville, Sukyoung K. Yi +8
We investigate the correlation of star formation quenching with internal galaxy properties and large scale environment (halo mass) in empirical data and theoretical models. We make…
Environmental Effects on Satellite Galaxies: The Link Between Concentration, Size and Colour Profile
Simone M. Weinmann, Guinevere Kauffmann, Frank C. van den Bosch +5
Using the SDSS DR4 group catalogue of Yang et al. (2007), we investigate sizes, concentrations, colour gradients and surface brightness profiles of central and satellite galaxies.…
The Rise and Fall of Galaxy Activity in Dark Matter Haloes
Anna Pasquali, Frank C. van den Bosch, H. J. Mo +2
We use a SDSS galaxy group catalogue to study the dependence of galaxy activity on stellar mass, halo mass, and group hierarchy (centrals vs. satellites). We split our galaxy sampl…
Radio continuum observations of the candidate supermassive black hole in the dwarf elliptical VCC128
Pieter Buyle, Sven De Rijcke, Victor P. Debattista +4
The presence of black holes (BHs) at the centers of dwarf elliptical galaxies (dEs) has been argued both theoretically and observationally. Using archival HST/WFPC2 data, we found…
The outskirts of Cygnus OB2
F. Comeron, A. Pasquali, F. Figueras +1
We investigate the possible existence of an extended halo of early-type stars around Cygnus OB2, which is hinted at by near-infrared color-color diagrams, and its relationship to C…