Results 11 to 20 of about 169,580 (246)

Young and intermediate-age massive star clusters [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2010
An overview of our current understanding of the formation and evolution of star clusters is given, with the main emphasis on high-mass clusters. Clusters form deeply embedded within dense clouds of molecular gas. Left-over gas is cleared within a few million years and, depending on the efficiency of star formation, the clusters may disperse almost ...
Girardi L., Larsen S. S., Larsen S. S., Meylan G., Shapley H., Shapley H., Spitzer L., Whitmore B. C., Wielen R., Williams J. P.   +9 more
openaire   +5 more sources

Young massive star clusters: achievements and challenges [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractIn spite of significant recent and ongoing research efforts, most of the early evolution and long-term fate of young massive star clusters remain clouded in uncertainties. Here, I discuss our understanding of the initial conditions of star cluster formation and the importance of initial substructure for the subsequent dynamical-evolution and ...
de Grijs, Richard
openaire   +3 more sources

Filamentary Star Formation in NGC 1275 [PDF]

, 2014
We examine the star formation in the outer halo of NGC~1275, the central galaxy in the Perseus cluster (Abell 426), using far ultraviolet and optical images obtained with the Hubble Space Telescope.
Canning, R. E. A, Conselice, C. J., Fabian, A. C., Gallagher III, J. S., Hicks, A., Johnstone, R. M., Kotulla, R., O'Connell, R. W., Rosario, D., Ryon, J. E., Wyse, R. F. G.   +10 more
core   +2 more sources

From the Top Down and Back Up Again: Star Cluster Structure from Hierarchical Star Formation [PDF]

, 2018
Young massive star clusters spanning $\sim 10^4 - 10^8 M_\odot$ in mass have been observed to have similar surface brightness profiles. Recent hydrodynamical simulations of star cluster formation have also produced star clusters with this structure.
Boylan-Kolchin, Michael, Grudić, Michael Y., Guszejnov, Dávid, Hopkins, Philip F., Lamberts, Astrid, Murray, Norman, Schmitz, Denise   +6 more
core   +2 more sources

Galactic Rotation from Young Open Star Clusters [PDF]

Symposium - International Astronomical Union, 1980
The rotation of the Galaxy can best be studied with the aid of tracers for which distance and velocity can be obtained simultaneously, accurately and unambiguously out to large distances. Clearly, the best objects are the very young clusters. The local gradient of the angular velocity is contained in Oort's constant and, due e.g. to perturbations from
H. M. Maitzen, A.F.J. Moffat, Th. Schmidt-Kaler   +2 more
openaire   +1 more source

The young Galactic star cluster [DBS2003] 179 [PDF]

Astronomy & Astrophysics, 2008
Recent near- and mid-infrared surveys have brought evidence that the Milky Way continues to form massive clusters. We carry out a program to determine the basic physical properties of the new massive cluster candidate [DBS2003]179. Medium-resolution K-band spectra and deep near-infrared images of [DBS2003]179 were used to derive the spectral types of ...
Borissova, J., Ivanov, V. D., Hanson, M. M., Georgiev, L., Minniti, D., Kurtev, R., Geisler, D.   +6 more
openaire   +3 more sources

The stellar content of the super star clusters in NGC 1569 [PDF]

, 2001
We discuss HST FOS ultraviolet spectroscopy and NICMOS near-infrared photometry of four young super star clusters in the central region of the irregular starburst galaxy NGC 1569. The new observations coupled with previous HST WFPC2 photometry and ground-
Alessandra Aloisi, Bica E., Buonanno R., Cervino M., Chiosi C., Claus Leitherer, Girardi L., Greve A., Israel F. P., Laura Greggio, Livia Origlia, Maeder A., Meynet G., Monica Tosi, Oliva E., Prada F., Sagar R., van den Bergh S.   +17 more
core   +2 more sources

STAR-FORMING GAS IN YOUNG CLUSTERS [PDF]

The Astrophysical Journal, 2010
To appear in Astrophysical Journal, May ...
openaire   +2 more sources

Testing circumstellar disk lifetimes in young embedded clusters associated with the Vela Molecular Ridge [PDF]

, 2010
Context. The Vela Molecular Ridge hosts a number of young embedded star clusters in the same evolutionary stage. Aims. The main aim of the present work is testing whether the fraction of members with a circumstellar disk in a sample of clusters in the ...
Codella, Claudio, Di Carlo, Elisa, Gomes, Joana, Massi, Fabrizio, Testi, Leonardo, Vanzi, Leonardo   +5 more
core   +3 more sources

Early dynamical evolution of star cluster systems [PDF]

, 2009
Violent relaxation -- the protocluster dynamical response to the expulsion of its residual star forming gas -- is a short albeit crucial episode in the evolution of star clusters and star cluster systems. Because it is heavily driven by cluster formation
Geneviève Parmentier, Goodwin, Larsen, Larsen, Scheepmaker   +4 more
core   +1 more source