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We present colour-magnitude diagrams for two rich (~10^4 Msun) Large Magellanic Cloud star clusters with ages ~10^7 years, constructed from optical and near-infrared data obtained with the Hubble Space Telescope. These data are part of an…

天体物理学 · 物理学 2009-10-31 R. A. Johnson , S. F. Beaulieu , G. F. Gilmore , J. Hurley , B. X. Santiago , N. R. Tanvir , R. A. W. Elson

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…

星系天体物理 · 物理学 2015-06-23 Florian Niederhofer , Michael Hilker , Nate Bastian , Esteban Silva-Villa

Recent studies have shown that the observed main-sequence turn-off (MSTO) in colour-magnitude diagrams of intermediate age (1-2 Gyr) clusters in the LMC are broader than would be nominally expected for a simple stellar population. This has…

宇宙学与河外天体物理 · 物理学 2015-06-15 Nate Bastian , Esteban Silva-Villa

We show the results of deep V and I HST photometry of 6 rich star clusters in the Large Magellanic Cloud with different ages and metallicities. The number of stars with measured magnitudes in each cluster varies from about 3000 to 10000. We…

天体物理学 · 物理学 2009-11-06 B. Santiago , S. Beaulieu , R. Johnson , G. Gilmore

This study presents a comprehensive analysis of the youngest stellar clusters in the Large Magellanic Cloud (LMC), utilising a multi-wavelength approach. We analyse data spanning from infrared to ultraviolet wavelengths, with the goal of…

星系天体物理 · 物理学 2025-03-13 Ricardo Chávez , Rosa Amelia González-Lópezlira , Gustavo Bruzual

We present the detailed analysis of Hubble Space Telescope observations of the spatial distributions of different stellar species in two young compact star clusters in the Large Magellanic Cloud (LMC), NGC 1805 and NGC 1818. Based on a…

天体物理学 · 物理学 2007-05-23 Richard de Grijs , Gerry F. Gilmore , Rachel A. Johnson

We present the detailed analysis of Hubble Space Telescope observations of the spatial distributions of different stellar species in two young compact star clusters in the Large Magellanic Cloud, NGC 1805 and NGC 1818. Based on a comparison…

天体物理学 · 物理学 2007-05-23 Richard de Grijs , Gerry Gilmore , Rachel Johnson

Recently, a noticeable number of new star clusters was identified in the outskirts of the Large Magellanic Cloud (LMC) populating the so-called star cluster age gap, a space of time (~ 4-12 Gyr) where the only known star cluster is…

星系天体物理 · 物理学 2021-03-31 Andrés E. Piatti

In our HST photometric survey, we have been searching for multiple stellar populations (MPs) in Magellanic Clouds (MCs) massive star clusters which span a significant range of ages ($\sim 1.5-11$ Gyr). In the previous papers of the series,…

Star formation is a hierarchical process, forming young stellar structures of star clusters, associations, and complexes over a wide scale range. The star-forming complex in the bar region of the Large Magellanic Cloud is investigated with…

In this contribution I will present the current status of our project of stellar population analyses and spatial information of both Magellanic Clouds (MCs). The Magellanic Clouds - especially the LMC with its large size and small depth…

天体物理学 · 物理学 2007-05-23 Jochen M. Braun

In this paper we discuss the age and spatial distribution of young (age$<$1Gyr) SMC and LMC clusters using data from the Magellanic Cloud Photometric Surveys. Luminosities are calculated for all age-dated clusters. Ages of 324 and 1193…

星系天体物理 · 物理学 2015-05-18 Katharina Glatt , Eva K. Grebel , Andreas Koch

We use HST observations to study the LMC's young cluster NGC1844. We estimate the fraction and the mass-ratio distribution of photometric binaries and report that the main sequence presents an intrinsic breadth which can not be explained in…

太阳与恒星天体物理 · 物理学 2015-06-12 A. P. Milone , L. R. Bedin , S. Cassisi , G. Piotto , J. Anderson , A. Pietrinferni , R. Buonanno

We present details of the database from a large Cycle 7 HST project to study the formation and evolution of rich star clusters in the Large Magellanic Cloud (see Elson et al., this volume). Our data set, which includes NICMOS, WFPC2 and…

天体物理学 · 物理学 2007-05-23 S. F. Beaulieu , R. Elson , G. Gilmore , R. A. Johnson , N. Tanvir , B. Santiago

We have introduced a semi-automated quantitative method to estimate the age and reddening of 1072 star clusters in the Large Magellanic Cloud (LMC) using the Optical Gravitational Lensing Experiment (OGLE) III survey data. This study brings…

星系天体物理 · 物理学 2016-08-24 P. K. Nayak , A. Subramaniam , S. Choudhury , G. Indu , Ram Sagar

Massive stars are key players in the evolution of galaxies, yet their formation pathway remains unclear. In this work, we use data from several galaxy-wide surveys to build an unbiased dataset of ~700 massive young stellar objects (MYSOs),…

星系天体物理 · 物理学 2016-11-23 B. B. Ochsendorf , M. Meixner , J. Chastenet , A. G. G. M. Tielens , J. Roman-Duval

The origin of young star clusters represents a major challenge for modern stellar astrophysics. While stellar rotation partially explains the colour spread observed along main-sequence turn-offs, i.e. where stars leave the main-sequence…

NGC1846 and NGC1783 are two massive star clusters in the Large Magellanic Cloud, hosting both an extended main sequence turn-off and a dual clump of red giants. They present similar masses but differ mainly in angular size. Starting from…

太阳与恒星天体物理 · 物理学 2015-06-12 Stefano Rubele , Leo Girardi , Vera Kozhurina-Platais , Leandro Kerber , Paul Goudfrooij , Alessandro Bressan , Paola Marigo

We report the serendipitous young Large Magellanic Cloud cluster, NGC 1971, exhibits an extended main-sequence turnoff (eMSTO) possibly originated by mostly a real age spread. We used CT1 Washington photometry to produce a colour-magnitude…

星系天体物理 · 物理学 2017-07-26 Andrés E. Piatti , Andrew Cole

We review the complications involved in the conversion of stellar luminosities into masses and apply a range of mass-to-luminosity relations to our Hubble Space Telescope observations of the young LMC star clusters NGC 1805 and NGC 1818.…

天体物理学 · 物理学 2009-11-07 R. de Grijs , G. F. Gilmore , R. A. Johnson , A. D. Mackey
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