Dynamical Mass Estimates for Five Young Massive Stellar Clusters

@article{Larsen2004DynamicalME,
  title={Dynamical Mass Estimates for Five Young Massive Stellar Clusters},
  author={S{\o}ren S. Larsen and Jean P. Brodie and Deidre A. Hunter},
  journal={The Astronomical Journal},
  year={2004},
  volume={128},
  pages={2295 - 2305}
}
We have obtained high-dispersion spectra for four massive star clusters in the dwarf irregular galaxies NGC 4214 and NGC 4449, using the HIRES spectrograph on the Keck I telescope. Combining the velocity dispersions of the clusters with structural parameters and photometry from images taken with the Hubble Space Telescope, we estimate mass-to-light (M/L) ratios and compare these with simple stellar population models in order to constrain the stellar mass functions (MFs) of the clusters. For all… 

OLD MASSIVE GLOBULAR CLUSTERS AND THE STELLAR HALO OF THE DWARF STARBURST GALAXY NGC 4449

We use Hubble Space Telescope imaging to show that the nearby dwarf starburst galaxy NGC 4449 has an unusual abundance of luminous red star clusters. Joint constraints from integrated photometry,

The Young Stellar Population of NGC 4214 as Observed with the Hubble Space Telescope. II. Results

We present the results of a detailed UV-optical study of the nearby dwarf starburst galaxy NGC 4214 using multifilter Hubble Space Telescope WFPC2 and STIS photometry. The stellar extinction is found

GEMINI SPECTROSCOPIC SURVEY OF YOUNG STAR CLUSTERS IN MERGING/INTERACTING GALAXIES. III. THE ANTENNAE

We present optical spectroscopy of 16 star clusters in the merging galaxies NGC 4038/39 (“the Antennae”) and supplement this data set with Hubble Space Telescope imaging. The age and metallicity of

Young star clusters in interacting galaxies - NGC 1487 and NGC 4038/4039

We estimate the dynamical masses of several young (≈10 Myr) massive star clusters in two interacting galaxies, NGC 4038/4039 (“The Antennae”) and NGC 1487, under the assumption of virial equilibrium.

Young star clusters in the Antennae galaxies and NGC 1487

We estimate the dynamical masses of several young (≈ 10 Myr) massive star clusters in two interacting galaxies, NGC 4038/4039 (“The Antennae”) and NGC 1487, under the assumption of virial

On the derivation of dynamical masses of the stellar clusters in the circumnuclear region of NGC 2903

Gas and star velocity dispersions have been derived for four circumnuclear star-forming regions (CNSFRs) and the nucleus of the spiral galaxy NGC 2903 using high resolution spectroscopy in the blue

Kinematics of gas and stars in the circumnuclear star-forming ring of NGC 3351

We have measured gas and stellar velocity dispersions in five circumnuclear star-forming regions (CNSFRs) and the nucleus of the barred spiral galaxy NGC 3351. The stellar dispersions have been

Super Star Cluster Velocity Dispersions and Virial Masses in the M82 Nuclear Starburst

We use high-resolution near-infrared spectroscopy from Keck Observatory to measure the stellar velocity dispersions of 19 super star clusters (SSCs) in the nuclear starburst of M82. The clusters have

STAR CLUSTERS IN THE NEARBY LATE-TYPE GALAXY NGC 1311

Ultraviolet, optical and near-infrared images of the nearby (D ≈ 5.5 Mpc) SBm galaxy NGC 1311, obtained with the Hubble Space Telescope, reveal a small population of 13 candidate star clusters. We

The initial mass spectrum of old globular clusters in dwarf galaxies

We test whether the masses of old globular clusters (GCs) in dwarf galaxies are consistent with the same initial mass spectrum as young massive clusters (YMCs) in nearby star-forming galaxies. The
...

References

SHOWING 1-10 OF 44 REFERENCES

The structure and environment of young stellar clusters in spiral galaxies

A search for stellar clusters has been carried out in 18 nearby spiral galaxies, using archive images from the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. All of the galaxies

Structure and Mass of a Young Globular Cluster in NGC 6946

Using the Wide Field Planetary Camera 2 on board the Hubble Space Telescope, we have imaged a luminous young star cluster in the nearby spiral galaxy NGC 6946. Within a radius of 65 pc, the cluster

High-Dispersion Spectroscopy of a Luminous, Young Star Cluster in NGC 1705: Further Evidence for Present-Day Formation of Globular Clusters

We present evidence that some of the compact, luminous, young star clusters discovered recently through images taken with the Hubble Space Telescope (HST) have masses comparable to those of old

The Formation and Evolution of Candidate Young Globular Clusters in NGC 3256

We present images of the recent galaxy merger NGC 3256 obtained with the Wide Field Planetary Camera 2 of the Hubble Space Telescope in B and I filters. We show that there is a large population of

Galactic Stellar and Substellar Initial Mass Function

We review recent determinations of the present‐day mass function (PDMF) and initial mass function (IMF) in various components of the Galaxy—disk, spheroid, young, and globular clusters—and in

M82-F: a doomed super star cluster?

We present high dispersion echelle spectroscopy of the very luminous, young super star cluster (SSC) ‘F’ in M82, obtained with the 4.2-m William Herschel Telescope (WHT), for the purpose of deriving

The Initial Mass Functions in the Super-Star Clusters NGC 1569A and NGC 1705-1

I use recent photometric and stellar velocity dispersion measurements of the super-star clusters (SSCs) NGC 1569A and NGC 1705-1 to determine their present-day luminosity/mass ratios (LV/M). I then

The Star Clusters in the Irregular Galaxy NGC 4449

We examine the star clusters in the luminous irregular galaxy NGC 4449. We use a near‐infrared spectrum and broadband images taken with the Hubble Space Telescope to place a limit of 8–15 Myr on the

Stellar population synthesis at the resolution of 2003

We present a new model for computing the spectral evolution of stellar populations at ages between 1 x 10 5 and 2 x 10 1 0 yr at a resolution of 3 A across the whole wavelength range from 3200 to

ASTROPHYSICS Young massive star clusters in nearby galaxies ⋆ II. Software tools, data reductions and cluster sizes

A detailed description is given of the data analysis leading to the discovery of young massive star clusters (YMCs) in a sample of 21 nearby galaxies. A new useful tool, ishape , for the derivation