ar X iv : a st ro - p h / 07 03 51 0 v 2 2 2 M ar 2 00 7 Multi - object Spectroscopy of Young Star Clusters in NGC 4676

ar X iv : a st ro - p h / 07 03 51 0 v 1 1 9 M ar 2 00 7 Multi - object Spectroscopy of Young Star Clusters in NGC 4676

Galaxy interactions are known to trigger starbursts. The young star clusters formed in mergers may be young globular clusters. The ages of these young star clusters yield the timing of interaction-triggered star formation and provide an important way to reconstruct the history of merging galaxies. Here we present the first results from our investigation into age and metallicity of twelve young ...

ar X iv : a st ro - p h / 02 10 42 0 v 1 1 8 O ct 2 00 2 Extragalactic Globular Clusters in the Near - Infrared

Visual and near-infrared colours are used to identify intermediate-age globular cluster in early-type galaxies. In NGC 5846 and NGC 4365 colour-colour diagrams (V-I vs. V-K) reveal a sub-population in the globular cluster systems with an age much younger than the expected old populations (13-15 Gyr). A comparison with SSP models dates the formation of this younger population 2-7 Gyr back. Furth...

ar X iv : a st ro - p h / 02 03 45 4 v 2 1 7 M ay 2 00 2 New Members of the Cluster Family in Nearby Lenticulars

Using spectra obtained with the Keck I telescope we have demonstrated conclusively that the faint (23≤V≤ 24 mag.) and unusually extended objects we discovered in HST images of the lenticular galaxies, NGC 1023 and NGC 3384, are star clusters associated with their respective galaxies. In the case of NGC 1023 we were further able to establish that these objects are old (≥7–8 Gyr), moderately meta...

ar X iv : a st ro - p h / 02 10 42 8 v 1 1 8 O ct 2 00 2 Star Clusters in Interacting Galaxies : The Case of M 51 Nate

ar X iv : a st ro - p h / 02 03 03 2 v 2 6 M ar 2 00 2 Stellar Contents and Globular Cluster Candidates in the Sculptor Group Galaxy NGC 300

We present UBV I CCD photometry of the stellar contents and globular cluster(GC) candidates in the spiral galaxy NGC 300 in the Sculptor group. Color-magnitude diagrams for 18 OB associations having more than 30 member stars are presented. The slope of the initial mass function for the bright stars in NGC 300 is estimated to be Γ = −2.6±0.3. Assuming the distance to NGC 300 of (m−M)0 = 26.53± 0...