5 papers · 1 filter
Impact of sub-solar metallicities on photometric redshifts
Ralf Kotulla, Uta Fritze
With the advent of deep photometric surveys the use of photometric redshifts, obtained with a variety of techniques, has become more and more widespread. Giving access to galaxies…
Rescuing the Initial Mass Function for Arp 78
Ralf Kotulla, Uta Fritze, John S Gallagher
We present deep R and narrow-band Halpha images of Arp 78 obtained with the WIYN 3.5-m telescope on Kitt Peak. GALEX observations had shown a very extended UV structure for this sy…
Young Globular Clusters in an old S0: Clues to the Formation History of NGC 4570
Ralf Kotulla, Uta Fritze, Peter Anders
We here present our first attempt to use Globular Clusters as tracers of their parent galaxy's formation history. Globular Cluster Systems of most early-type galaxies feature two p…
Reconstructing the Star Formation Histories of Galaxies
Uta Fritze, Thomas Lilly
We present a methodological study to find out how far back and to what precision star formation histories of galaxies can be reconstructed from CMDs, from integrated spectra and Li…
Star Formation in Galaxy Mergers: Scaling up a universal process or a violent mode of SF?
U. Fritze-v. Alvensleben
I briefly review some measures of star formation rates in galaxies and discuss their respective uncertainties before outlining the range of star formation rates encountered in star…