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The all-sky Milky Way Star Clusters (MWSC) survey provides uniform and precise ages and other parameters for a variety of clusters in the Solar Neighbourhood. We construct the cluster age distribution, investigate its spatial variations,…

星系天体物理 · 物理学 2018-06-13 A. E. Piskunov , A. Just , N. V. Kharchenko , P. Berczik , R. -D. Scholz , S. Reffert , S. X. Yen

High spectral resolution evolutionary synthesis models have become a routinely used ingredient in extragalactic work, and as such deserve thorough testing. Star clusters are ideal laboratories for such tests. This paper applies the spectral…

宇宙学与河外天体物理 · 物理学 2015-05-14 Rosa M. Gonzalez Delgado , Roberto Cid Fernandes

We report on the accretion properties of low-mass stars in the LH95 association within the Large Magellanic Cloud (LMC). Using non-contemporaneous wide-band and narrow-band photometry obtained with the HST, we identify 245 low-mass pre-main…

太阳与恒星天体物理 · 物理学 2019-04-24 Katia Biazzo , Giacomo Beccari , Guido De Marchi , Nino Panagia

We compare the observed mass functions and age distributions of star clusters in six well-studied galaxies: the Milky Way, Magellanic Clouds, M83, M51, and Antennae. In combination, these distributions span wide ranges of mass and age:…

星系天体物理 · 物理学 2015-06-05 S. Michael Fall , Rupali Chandar

To study the evolution of binary star clusters we have imaged 7 systems in the Small Magellanic Cloud with SOAR 4-m telescope using B and V filters. The sample contains pairs with well-separated components (d < 30 pc) as well as systems…

太阳与恒星天体物理 · 物理学 2015-05-14 J. F. C. Santos , A. A. Schmidt , E. Bica

Observations show that nearly all star clusters and stellar populations contain blue straggler stars (BSs). BSs in a cluster can significantly enhance the integrated spectrum of the host population, preferentially at short wavelengths, and…

太阳与恒星天体物理 · 物理学 2015-05-20 Yu Xin , Licai Deng , Richard de Grijs , Pavel Kroupa

The projected distribution of stars in the Small Magellanic Cloud (SMC) from the Magellanic Clouds Photometric Survey is analysed. Stars of different ages are selected via criteria based on V magnitude and V-I colour, and the degree of…

天体物理学 · 物理学 2011-07-21 M. Gieles , N. Bastian , B. Ercolano

As first Paper of a series devoted to study the old stellar population in clusters and fields in the Small Magellanic Cloud, we present deep observations of NGC121 in the F555W and F814W filters, obtained with the Advanced Camera for…

We revisit the determination of the age of the Universe from galactic globular clusters, extending previous analyses by explicitly accounting for the presence of multiple stellar populations within each cluster. Using high--quality…

星系天体物理 · 物理学 2026-03-06 David Valcin , Raul Jimenez , Carmela Lardo , Uroš Seljak , Licia Verde

We present surface brightness fluctuations (SBFs) in the near--IR for 191 Magellanic star clusters available in the Second Incremental and All Sky Data releases of the Two Micron All Sky Survey (2MASS), and compare them with SBFs of Fornax…

天体物理学 · 物理学 2009-11-10 Rosa A. Gonzalez , Michael C. Liu , Gustavo Bruzual-A.

We present a catalog of 2,990 extended sources in a 1deg x1deg area centered on M33 using the MegaCam camera on the 3.6m Canada-France-Hawaii telescope (CFHT). The catalog includes 599 new candidate stellar clusters, 204 previously…

星系天体物理 · 物理学 2015-05-19 Izaskun San Roman , Ata Sarajedini , Antonio Aparicio

The color-magnitude diagrams (CMDs) of young star clusters show that, particularly at ultraviolet wavelengths, their upper main sequences (MSs) bifurcate into a sequence comprising the bulk population and a blue periphery. The spatial…

太阳与恒星天体物理 · 物理学 2021-05-12 Yujiao Yang , Chengyuan Li , Richard de Grijs , Licai Deng

Recent studies have shown that the extended main-sequence turn off (eMSTO) is a common feature of intermediate-age star clusters in the Magellanic Clouds (MCs). The most simple explanation is that these stellar systems harbor multiple…

太阳与恒星天体物理 · 物理学 2015-05-27 A. P. Milone , L. R. Bedin , G. Piotto , A. F. Marino , S. Cassisi , A. Bellini , H. Jerjen , A. Pietrinferni , A. Aparicio , R. M. Rich

We present a morphological analysis of the feature-rich 2MASS LMC color-magnitude diagram, identifying Galactic and LMC populations and estimating the density of LMC populations alone. We also present the projected spatial distributions of…

天体物理学 · 物理学 2009-10-31 Sergei Nikolaev , Martin D. Weinberg

This study aims at identifying and understanding the parent population of novae in the Large Magellanic Cloud (LMC) by studying the local, projected, stellar population. The star formation history of the local environment around novae is…

天体物理学 · 物理学 2009-11-07 Annapurni Subramaniam , G. C. Anupama

We present intermediate-resolution (R$\sim$1000) spectra in the $\sim$3500-10,000 A range of 14 globular clusters in the magellanic irregular galaxy NGC 4449 acquired with the Multi Object Double Spectrograph on the Large Binocular…

We present Hubble Space Telescope ACS deep photometry of the intermediate-age globular cluster NGC 1783 in the Large Magellanic Cloud. By using this photometric dataset, we have determined the degree of ellipticity of the cluster…

天体物理学 · 物理学 2009-06-23 A. Mucciarelli , L. Origlia , F. R. Ferraro

In the process of searching the Hubble Space Telescope archive, we have serendipitously discovered three populous Large Magellanic Cloud (LMC) clusters with ages that place them in the LMC `age gap.'. These clusters - NGC 2155, SL663, and…

天体物理学 · 物理学 2007-05-23 Ata Sarajedini

We present a study of the properties of the star-cluster systems around pseudo-bulges of late-type spiral galaxies using a sample of 11 galaxies with distances from 17 to 37 Mpc. Star clusters are identified from multiband HST ACS and WFPC2…

宇宙学与河外天体物理 · 物理学 2015-05-14 Daiana Di Nino , Michele Trenti , Massimo Stiavelli , C. Marcella Carollo , Claudia Scarlata , Rosemary F. G. Wyse

An increasing number of young massive clusters (YMCs) in the Magellanic Clouds have been found to exhibit bimodal or extended main sequences (MSs) in their color--magnitude diagrams (CMDs). These features are usually interpreted in terms of…

太阳与恒星天体物理 · 物理学 2017-08-09 Chengyuan Li , Richard de Grijs , Licai Deng , Antonino P. Milone