Young and intermediate-age massive star clusters (2009)
An overview of our current understanding of the formation and evolution of star clusters is given, with main emphasis on high-mass clusters. Clusters form deeply embedded within dense clouds of...
Lyubenova, Mariya, Kuntschner, Harald, Rejkuba, Marina, Silva, David R., Kissler-Patig, Markus, Tacconi-Garman, Lowell E., ...
Current stellar population models have arguably the largest uncertainties in the near-IR wavelength range, partly due to a lack of large and well calibrated empirical spectral libraries. In this...
Spectroscopy of globular clusters in the low-luminosity spiral galaxy NGC 45 (2008)
Mora, Marcelo D., Larsen, Soeren S., Kissler-Patig, Markus
CONTEXT: Extragalactic globular clusters have been studied in elliptical galaxies and in a few luminous spiral galaxies, but little is known about globular clusters in low-luminosity spirals. AIMS:...
Mora, Marcelo D., Larsen, Soeren S., Kissler-Patig, Markus
We present results from ACS and WFPC observations in the low luminosity galaxy NGC 45. We identified 28 young star cluster candidates. While the exact values of age, mass, and extinction depend...
Young Massive Clusters - Formation Efficiencies and (Initial) Mass Functions (2006)
Globular clusters are often assumed to be good tracers of major star formation episodes in their host galaxies. While observations over the past 2 decades have confirmed the presence of young objects...
Continuous star cluster formation in the spiral NGC 45 (2005)
Mora, Marcelo, Larsen, Soeren S., Kissler-Patig, Markus
We determined ages for 52 star clusters with masses < 10^6 solar masses in the low surface brightness spiral galaxy NGC 45. Four of these candidates are old globular clusters located in the bulge....
Old Globular Clusters Masquerading as Young in NGC 4365? (2005)
Brodie, Jean P., Strader, Jay, Denicolo, Glenda, Beasley, Michael A., Cenarro, A. J., Larsen, Soeren S., ...
High signal-to-noise, low-resolution spectra have been obtained for 22 globular clusters (GCs) in NGC 4365. Some of these were selected as probable representatives of an intermediate-age (2-5 Gyr),...
The Structure and Environment of Young Stellar Clusters in Spiral Galaxies (2003)
A search for stellar clusters has been carried out in 18 nearby spiral galaxies, using HST/WFPC2 archive images. All of the galaxies have previously been imaged from the ground in UBVI. A catalogue...
HST Observations of Young Stellar Clusters in Nearby Galaxies (2003)
The HST data archive contains images of several nearby spirals, suitable for detailed studies of the properties of individual star clusters and their surroundings. By combining structural information...
On the Size Difference between Red and Blue Globular Clusters (2003)
Larsen, Soeren S., Brodie, Jean P.
Several recent studies have reported a mean size difference of about 20% between the metal-rich and metal-poor subpopulations of globular clusters (GCs) in a variety of galaxies. In this paper we...
Keck Spectroscopy of Globular Clusters in the Elliptical Galaxy NGC 3610 (2002)
Strader, Jay, Brodie, Jean P., Schweizer, Francois, Larsen, Soeren S., Seitzer, Patrick
We present moderate-resolution Keck spectra of nine candidate globular clusters in the possible merger-remnant elliptical galaxy NGC 3610. Eight of the objects appear to be bona fide globular...
The Luminosity Function of Star Clusters in Spiral Galaxies (2002)
Star clusters in 6 nearby spiral galaxies are examined using archive images from HST/WFPC2. The galaxies have previously been studied from the ground and some of them are known to possess rich...
New Members of the Cluster Family in Nearby Lenticulars (2002)
Brodie, Jean P., Larsen, Soeren S.
Using spectra obtained with the Keck I telescope we have demonstrated conclusively that the faint (23
Keck Spectroscopy of Young and Old Star Clusters in NGC 1023 (2001)
Larsen, Soeren S., Brodie, Jean P.
We present Keck/LRIS spectra for 11 old globular clusters in the S0-type galaxy NGC 1023 and 2 young blue clusters in the nearby companion NGC 1023A. Analysis of the spectra of 7 old clusters with...
HST photometry of Globular Clusters in the Sombrero Galaxy (2001)
Larsen, Soeren S., Forbes, Duncan A., Brodie, Jean P.
We explore the rich globular cluster (GC) system of the nearby Sa galaxy M104, the "Sombrero" (NGC 4594), using archive WFPC2 data. The GC colour distribution is found to be bimodal at the > 99%...
A G1-like globular cluster in NGC 1023 (2001)
The structure of a very bright (MV = -10.9) globular cluster in NGC 1023 is analyzed on two sets of images taken with the Hubble Space Telescope. From careful modeling of King profile fits to the...
Bulge Globular Clusters in Spiral Galaxies (2001)
Forbes, Duncan A., Brodie, Jean P., Larsen, Soeren S.
There is now strong evidence that the metal-rich globular clusters (GC) near the center of our Galaxy are associated with the Galactic bulge rather than the disk as previously thought. Here we extend...
Open, Massive and Globular Clusters - Part of the same family? (2001)
Populations of young star clusters show significant differences even among "normal" disk galaxies. In this contribution I discuss how properties of young cluster systems are related to those of their...
HST observations of star clusters in NGC 1023: Evidence for three cluster populations? (2000)
Larsen, Soeren S., Brodie, Jean P.
Using HST images we have carried out a study of cluster populations in the nearby S0 galaxy NGC 1023. In two WFPC2 pointings we have identified 221 cluster candidates. The small distance (~9 Mpc)...
Brodie, Jean P., Larsen, Soeren S., Kissler-Patig, Markus
NGC 3311, the central cD galaxy in the Hydra cluster, was previously thought to host the most metal-rich globular cluster system known. Ground-based Washington photometry had indicated the almost...
Young massive star clusters in M51 (2000)
A search for young massive star clusters (YMCs) in the nearby face-on spiral galaxy M51 (NGC 5194) has been carried out using UBV CCD images from the prime focus camera on the Lick 3 meter Shane...
Larsen, Soeren S., Richtler, Tom
Using ground-based UBVRI+Halpha CCD photometry we have been carrying out a search for young massive star clusters (YMCs) in a sample consisting of 21 nearby spiral galaxies. We find a large variety...