17 papers
VLT spectroscopy of globular cluster in NGC 3115
Harald Kuntschner, Bodo L. Ziegler, R. M. Sharples +2
We present results derived from VLT-FORS2 spectra of 17 globular clusters associated with the nearby lenticular galaxy NGC3115. Comparing line-strength indices to new stellar popul…
The N/O abundance ratio in the lowest-metallicity blue compact dwarf galaxies
Y. Izotov, F. Chaffee, C. Foltz +6
The results of the N/O abundance determination in a sample of low-metallicity blue compact dwarf (BCD) galaxies based on new spectroscopic observations with large telescopes (Keck,…
The FORS Deep Field
J. Heidt, I. Appenzeller, R. Bender +20
Dedicating a major fraction of its guaranteed time, the FORS consortium established a FORS Deep Field which contains a known QSO at z = 3.36. It was imaged in UBgRIz with FORS at t…
The Cometary Blue Compact Dwarf Galaxies Mkn 59 and Mkn 71: Clues to Dwarf Galaxy Evolution?
K. G. Noeske, N. G. Guseva, K. J. Fricke +3
"Cometary" Blue Compact Dwarf Galaxies (iI,C BCDs) are characterized by off-center starbursts close to the end of an elongated dwarf irregular (dI)-like host galaxy. This may eithe…
Tidal dwarf candidates in a sample of interacting galaxies
Peter M. Weilbacher, P. -A. Duc, U. Fritze-v. Alvensleben +2
We present deep optical B, V, R images of a sample of 10 interacting systems which were selected for their resemblance to disturbed galaxies at high redshift. Photometry is perform…
Is I Zw 18 a young galaxy?
Y. I. Izotov, P. Papaderos, T. X. Thuan +3
Hubble Space Telescope (HST) colour - magnitude diagrams in B, V and R along with long-slit Multiple Mirror Telescope (MMT) spectrophotometric data are used to investigate the evol…