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We identified star clusters in archived HST/WFPC2 images of the merger and ultra-luminous infrared galaxy NGC 6240, with the aim of investigating whether star cluster properties (luminosity, age and mass) in such an extreme environment…

Astrophysics · Physics 2009-11-10 A. Pasquali , R. de Grijs , J. S. Gallagher

A model of protostar mass and luminosity evolution in clusters gives new estimates of cluster age, protostar birthrate, accretion rate and mean accretion time. The model assumes constant protostar birthrate, core-clump accretion, and…

Astrophysics of Galaxies · Physics 2015-06-04 Philip C. Myers

In the last decade star clusters have been found in the centers of spiral galaxies across all Hubble types. We here present a spectroscopic study of the exceptionally bright (10^6 - 10^8 Lsun) but compact (Re ~ 5 pc) nuclear star clusters…

We study the protoplanetary disk lifetimes using a large sample of young stellar objects in nearby clusters. To investigate the final phase of disk dissipation, we selected 32 clusters, located within 500 pc and aged between 1 and 100 Myr,…

Solar and Stellar Astrophysics · Physics 2025-07-03 Gregory Mathews Ben , Jessy Jose , Jesús Hernández

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…

Astrophysics · Physics 2009-11-13 Li-Hsin Chien , Joshua E. Barnes , Lisa J. Kewley , Kenneth C. Chambers

(abridged) The old Star Cluster (SC) systems surrounding any sofar investigated galaxy represent a powerful tool for the understanding of the cosmological evolution of their host galaxies. Phases of enhanced cluster formation can be…

Astrophysics · Physics 2007-05-23 P. Anders , R. de Grijs , U. Fritze-v. Alvensleben

The nearby dwarf starburst galaxy NGC5253 hosts a number of young, massive star clusters, the two youngest of which are centrally concentrated and surrounded by thermal radio emission (the `radio nebula'). To investigate the role of these…

We present new H alpha and [O III] 5007 narrow band images of the starbursting dwarf galaxy NGC 4214, obtained with the WFPC2 onboard HST, together with VLA observations of the same galaxy. The HST images resolve features down to physical…

Using the star cluster catalogs from the Hubble Space Telescope program Legacy ExtraGalactic UV survey (LEGUS) and 8 $\mu$m images from the IRAC camera on the Spitzer Space Telescope for 5 galaxies within 5 Mpc, we investigate how the 8…

Astrophysics of Galaxies · Physics 2020-06-11 Zesen Lin , Daniela Calzetti , Xu Kong , A. Adamo , M. Cignoni , D. O. Cook , D. A. Dale , K. Grasha , E. K. Grebel , M. Messa , E. Sacchi , L. J. Smith

The properties of young stellar clusters (YSCs) in M33, identified from the center out to about twice the size of the bright star-forming disk,are investigated. We find 915 discrete MIR sources as far as the extent of the warped HI disk,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Saurabh Sharma , Edvige Corbelli , Carlo Giovanardi , Leslie K. Hunt , Francesco Palla

In the first few Myr the massive stars dynamically interact, produce runaways and affect the initial binary population. Observing and interpreting the dynamics of young massive clusters is key to our understanding of the star formation…

Astrophysics of Galaxies · Physics 2023-02-15 Mitchel Stoop , Lex Kaper , Alex de Koter , Difeng Guo , Henny J. G. L. M. Lamers , Steven Rieder

We present a new method of quantifying the mass fraction of young stars in galaxies by analyzing near-ultraviolet (NUV)-optical colors. We focus our attention on early-type cluster galaxies, whose star formation history is at present…

Astrophysics · Physics 2009-10-31 I. Ferreras , J. Silk

Recent observational studies of the age distribution of star clusters in nearby merging galaxies and starburst (SB) galaxies indicate a premature death of the young clusters. The fate of an evolving star cluster crucially depends of its gas…

Astrophysics · Physics 2009-11-11 C. Melioli , E. M. de Gouveia Dal Pino

Context: Young massive clusters are key to map the Milky Way's structure, and near-IR large area sky surveys have contributed strongly to the discovery of new obscured massive stellar clusters. Aims: We present the third article in a series…

We use the ages, masses and metallicities of the rich young star cluster systems in the nearby starburst galaxies NGC 3310 and NGC 6745 to derive their cluster formation histories and subsequent evolution. We further expand our analysis of…

Astrophysics · Physics 2012-08-27 R. de Grijs , P. Anders , N. Bastian , R. Lynds , H. J. G. L. M. Lamers , E. J. O'Neil,

In this paper we continued our efforts to understand the star formation scenario in and around the young cluster NGC 1893. We used a sample of the young stellar sources (YSOs) identified on the basis of multiwavelength data (optical,…

Solar and Stellar Astrophysics · Physics 2015-06-05 A. K. Pandey , M. R. Samal , N. Chauhan , C. Eswaraiah , J. C. Pandey , W. P. Chen , D. K. Ojha

We present optical and near-infrared colour maps of the central regions of bulges of S0 and spiral galaxies obtained with WFPC2 and NICMOS on the HST. By combined use of HST and ground-based data the colour information spans from a few tens…

Recent discoveries have put the picture of stellar clusters being simple stellar populations into question. In particular, the color-magnitude diagrams of intermediate age (1-2 Gyr) massive clusters in the Large Magellanic Cloud (LMC) show…

Astrophysics of Galaxies · Physics 2015-06-23 Florian Niederhofer , Michael Hilker , Nate Bastian , Esteban Silva-Villa
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