Results 11 to 20 of about 352,865 (294)

The Star Clusters in the Irregular Galaxy NGC 4449 [PDF]

, 2000
We examine the star clusters in the irregular galaxy NGC 4449. We use a near-infrared spectrum and broad-band images taken with the HST to place a limit of 8--15 Myrs on the age of the bright central ojbect in NGC 4449.
Andrea E. Gelatt, Bajaja E., Bica E., Deidre A. Hunter, J. S. Gallagher, Larsen S. S., Noguchi M., Olofsson K., Poulain P., Quinn T., Theis C.   +10 more
core   +2 more sources

The Role of Binarity and Stellar Rotation in the Split Main Sequence of NGC 2422

The Astrophysical Journal, 2022
In addition to the extended main-sequence turnoffs widely found in young and intermediate-age (∼600 Myr to 2 Gyr old) star clusters, some younger clusters even exhibit split main sequences (MSs).
Chenyu He, Weijia Sun, Chengyuan Li, Lu Li, Zhengyi Shao, Jing Zhong, Li Chen, Richard de Grijs, Baitian Tang, Songmei Qin, Zara Randriamanakoto   +10 more
doaj   +1 more source

Star cluster formation and star formation: the role of environment and star-formation efficiencies [PDF]

, 2008
“The original publication is available at www.springerlink.com”. Copyright Springer. DOI: 10.1007/s10509-009-0088-5By analyzing global starburst properties in various kinds of starburst and post-starburst galaxies and relating them to the properties of ...
A. Pasquali, A. Schulz, B.C. Whitmore, B.C. Whitmore, B.C. Whitmore, B.G. Elmegreen, B.W. Miller, C. Maraston, C.D. Wilson, C.D. Wilson, C.J. Jog, C.J. Jog, D. Calzetti, E. Hummel, F. Schweizer, F. Schweizer, F. Schweizer, F. Schweizer, G. Parmentier, G. Parmentier, G. Trancho, G. Worthey, G.R. Meurer, H. Krueger, J. Gorgas, J. Schulz, J.H. Brown, K.A. Knierman, M. Haas, M.D. Mora, O.M. Kurth, P. Anders, P. Anders, P. Anders, P. Anders, P. Goudfrooij, P. Goudfrooij, P. Goudfrooij, P. Goudfrooij, P.M. Solomon, R. Grijs de, R. Grijs de, S. Bergh van der, S.C. Gallagher, S.E. Zepf, S.G. Boutloukos, S.S. Larsen, S.S. Larsen, T. Lilly, T. Lilly, U. Fritze-v. Alvensleben, U. Fritze-v. Alvensleben, U. Fritze-v. Alvensleben, U. Fritze-v. Alvensleben, Uta Fritze, Y. Gao, Y. Gao, Y. Li, Y. Shioya   +58 more
core   +2 more sources

Star cluster ecology -- IV. Dissection of an open star cluster: photometry [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
reduced abstract, 33 pages (three separate color .jpg figures), submitted to ...
Portegies Zwart, S.F., McMillan, S.L.W., Hut, P., Makino, J.   +3 more
openaire   +4 more sources

Molecular Gas Properties in Young Stellar Clusters with a Suppressed Star Cluster Wind

The Astrophysical Journal Letters, 2023
In compact and dense star-forming clouds a global star cluster wind could be suppressed. In this case stellar feedback is unable to expel the leftover gas from the cluster. Young massive stars remain embedded in a dense residual gas and stir it by moving
Sergiy Silich, Jean Turner, Jonathan Mackey, Sergio Martínez-González   +3 more
doaj   +1 more source

The star cluster - field star connection in nearby spiral galaxies. II. Field star and cluster formation histories and their relation

, 2011
Recent studies have started to cast doubt on the assumption that most stars are formed in clusters. Observational studies of field stars and star cluster systems in nearby galaxies can lead to better constraints on the fraction of stars forming in ...
Larsen, Soeren, Silva-Villa, Esteban
core   +5 more sources

Star cluster dynamics [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2010
Dynamical evolution plays a key role in shaping the current properties of star clusters and star cluster systems. A detailed understanding of the effects of evolutionary processes is essential to be able to disentangle the properties that result from dynamical evolution from those imprinted at the time of cluster formation.
openaire   +3 more sources

Star cluster ecology – V. Dissection of an open star cluster: spectroscopy [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
17 pages, submitted to ...
Portegies Zwart, S.F., Hut, P., McMillan, S.L.W., Makino, J.   +3 more
openaire   +4 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

Nuclear star clusters [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractThe centers of most galaxies in the local Universe are occupied by compact, barely resolved sources. Based on their structural properties, position in the Fundamental Plane, and integrated spectra, these sources clearly have a stellar origin. They are therefore called ‘nuclear star clusters’ (NCs) or ‘stellar nuclei’.
openaire   +2 more sources