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We present deep, wide-field J, H and Ks images taken with IRIS2 on the Anglo Australian Telescope, towards the massive star formation region G305.2+0.2. Combined with 3.6, 4.5, 5.8 and 8.0 micron data from the GLIMPSE survey on the Spitzer…

Astrophysics · Physics 2008-11-26 S. N. Longmore , M. Maercker , S. Ramstedt , M. G. Burton

We present results from the first population synthesis study of protostellar discs. We analyse the evolution and properties of a large sample of protostellar discs formed in a radiation hydrodynamical simulation of star cluster formation.…

Solar and Stellar Astrophysics · Physics 2018-01-25 Matthew R. Bate

We present new Spitzer Space Telescope observations of the young cluster NGC2264. Observations at 24 micron with the Multiband Imaging Photometer has enabled us to identify the most highly embedded and youngest objects in NGC2264. This…

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

Understanding the formation and evolution of young star clusters requires quantitative statistical measures of their structure. We investigate the structures of observed and modelled star-forming clusters. By considering the different…

Astrophysics · Physics 2007-05-23 S. Schmeja , R. S. Klessen

We report on a study of young star cluster complexes in the spiral galaxy M51. Recent studies have confirmed that star clusters do not form in isolation, but instead tend to form in larger groupings or complexes. We use {\it HST} broad and…

Astrophysics · Physics 2009-11-11 Nate Bastian , Mark Gieles , Yuri N. Efremov , Henny J. G. L. M. Lamers

Young massive clusters are as young as open clusters but more massive and compact compared with typical open clusters. The formation process of young massive clusters is still unclear, and it is an open question whether the formation…

Astrophysics of Galaxies · Physics 2015-06-23 Michiko S. Fujii

The ability of HST to resolve objects ten times smaller than possible from the ground has rejuvenated the study of young star clusters. A recurrent morphological theme found in nearby resolved sytems is the observation of young (typically 1…

Astrophysics · Physics 2007-05-23 Bradley C. Whitmore

[abridged] Unbound young stellar systems, the loose ensembles of physically related young bright stars, trace the typical regions of recent star formation in galaxies. Their morphologies vary from small associations of stars to enormous…

Astrophysics of Galaxies · Physics 2018-07-02 Dimitrios A. Gouliermis

The evolution of HII regions/supershells can trigger a new generation of stars/clusters at their peripheries, with environmental conditions that may affect the initial mass function, disk evolution and star formation efficiency. In this…

Solar and Stellar Astrophysics · Physics 2017-02-22 Jessy Jose , Gregory J. Herczeg , Manash R. Samal , Qiliang Fang , Neelam Panwar

We review the formation and early evolution of the most massive and dense young stellar clusters, focusing on the role they can play in our understanding of star and planet formation as a whole. Young massive cluster (YMC) progenitor clouds…

Most stars are born in rich young stellar clusters (YSCs) embedded in giant molecular clouds. The most massive stars live out their short lives there, profoundly influencing their natal environments by ionizing HII regions, inflating…

We study the radial number density and stellar mass density distributions of satellite galaxies in a sample of 60 massive clusters at 0.04<z<0.26 selected from the Multi-Epoch Nearby Cluster Survey (MENeaCS) and the Canadian Cluster…

Cosmology and Nongalactic Astrophysics · Physics 2015-04-29 Remco F. J. van der Burg , Henk Hoekstra , Adam Muzzin , Cristóbal Sifón , Michael L. Balogh , Sean L. McGee

We analyse multi-wavelength Hubble Space Telescope (HST) observations of a large number of star clusters in the nearby (post-) starburst dwarf galaxy NGC 1569. Their spectral energy distributions (SEDs) cover at least the wavelength range…

Astrophysics · Physics 2009-11-10 P. Anders , R. de Grijs , U. Fritze--v. Alvensleben , N. Bissantz

The Interstellar Medium has a fractal structure, in the sense that gas and dust distribute in a hierarchical and self-similar manner. Stars in new-born cluster probably follow the same fractal patterns of their parent molecular clouds.…

Astrophysics of Galaxies · Physics 2012-08-02 Nestor Sanchez , Emilio J. Alfaro

Traditional studies of stellar clusters in external galaxies use surface photometry and therefore focus on systems that are still bright and compact enough to be separated from the stellar background. Consequently, the latter stages of…

Astrophysics · Physics 2007-05-23 Anne Pellerin , Martin Meyer , Jason Harris , Daniela Calzetti

We map the full extent of a rich massive young cluster in the Cep OB3b association with the IRAC and MIPS instruments aboard the {\it Spitzer} Space Telescope and the ACIS instrument aboard the $\it{Chandra}$ X-Ray Observatory. At 700 pc,…

We present IRAC/MIPS Spitzer Space Telescope observations of the solar type and the low mass stellar population of the young (~5 Myr) Lambda Orionis cluster. Combining optical and 2MASS photometry, we identify 436 stars as probable members…

Solar and Stellar Astrophysics · Physics 2015-05-19 Jesus Hernandez , Maria Morales-Calderon , Nuria Calvet , L. Hartmann , J. Muzerolle , R. Gutermuth , K. L. Luhman , J. Stauffer

We present results from the largest numerical simulation of star formation to resolve the fragmentation process down to the opacity limit. The simulation follows the collapse and fragmentation of a large-scale turbulent molecular cloud to…

Astrophysics · Physics 2011-05-05 Matthew R. Bate , Ian A. Bonnell , Volker Bromm

We report on a multi-wavelength study of the relationship between young star clusters in the Antennae galaxies (NGC 4038/9) and their interstellar environment, with the goal of understanding the formation and feedback effects of star…

Astrophysics · Physics 2009-11-06 Qing Zhang , S. Michael Fall , Bradley C. Whitmore