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Related papers: Hierarchical structures in the Large and Small Mag…

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The distribution of the number of clusters as a function of mass M and age T suggests that clusters get eroded or dispersed in a regular way over time, such that the cluster number decreases inversely as an approximate power law with T…

Astrophysics of Galaxies · Physics 2015-05-18 Bruce G. Elmegreen , Deidre A. Hunter

In this paper we present a study and comparison of the star formation rates (SFR) in the fields around NGC 1898 and NGC 2154, two intermediate-age star clusters located in very different regions of the Large Magellanic Cloud. We also…

Astrophysics of Galaxies · Physics 2015-06-11 E. Chiosi , G. Baume , G. Carraro , E. Costa , A. Vallenari

We present in this study flux-calibrated integrated spectra in the range 3600-6800A for 18 concentrated SMC clusters. Cluster reddening values were estimated by interpolation between the extinction maps of Burstein & Heiles (1982, AJ, 87,…

Astrophysics · Physics 2009-11-11 A. E. Piatti , J. F. C. Santos , J. J. Claria , E. Bica , A. V. Ahumada , M. C. Parisi

We use data on variable stars from the Optical Gravitational Lensing Experiment (OGLE III) survey to determine the three-dimensional structure of the Small Magellanic Cloud (SMC). Deriving individual distances to RR Lyrae stars and Cepheids…

Astrophysics of Galaxies · Physics 2015-06-11 Raoul Haschke , Eva K. Grebel , Sonia Duffau

We offer a new way to look at the Large Magellanic Cloud through stellar mono-abundance and mono-age-mono-abundance maps. These maps are based on $\gtrsim 500\,000$ member stars with photo-spectroscopic [M/H] and age estimates from Gaia DR3…

Astrophysics of Galaxies · Physics 2024-03-14 Neige Frankel , Rene Andrae , Hans-Walter Rix , Joshua Povick , Vedant Chandra

We present a study of the spatial distribution of the stellar cluster populations in the star forming galaxy NGC 628. Using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury Program LEGUS (Legacy…

We compare the distribution of stars of different spectral types, and hence mean age, within the central SMC and find that the asymmetric structures are almost exclusively composed of young main sequence stars. Because of the relative lack…

Astrophysics · Physics 2014-10-13 Dennis Zaritsky , Jason Harris , Eva K. Grebel , Ian B. Thompson

We analyze ages and metallicities for some 5.5 million stars distributed throughout the Large Magellanic Cloud (LMC) main body, obtained from CCD Washington CT1 photometry. We produce a comprehensive field star Age-Metallicity Relationship…

Astrophysics of Galaxies · Physics 2015-06-11 Andrés E. Piatti , Doug Geisler

The clusters of young stars in massive star-forming regions show a wide range of sizes, morphologies, and numbers of stars. Their highly subclustered structures are revealed by the MYStIX project's sample of 31,754 young stars in nearby…

Binary clusters account for more than 10 % of the cluster population in the Magellanic Clouds. Statistically fewer than 50 % of the found pairs are expected to be chance superpositions. We estimated the cluster encounter rate and suggest…

Astrophysics · Physics 2007-05-23 Andrea Dieball , Eva K. Grebel

Surface brightness profiles for 23 M31 star clusters were measured using images from the Wide Field Planetary Camera 2 on the Hubble Space Telescope, and fit to two types of models to determine the clusters' structural properties. The…

Astrophysics of Galaxies · Physics 2011-01-07 P. Barmby , S. Perina , M. Bellazzini , J. G. Cohen , P. W. Hodge , J. P. Huchra , M. Kissler-Patig , T. H. Puzia , J. Strader

The Magellanic Clouds are a local laboratory for understanding the evolution and properties of dwarf irregular galaxies. To reveal the extended structure and interaction history of the Magellanic Clouds we have undertaken a large-scale…

HST is very well tailored for observations of extragalactic star clusters. One obvious reason is HST's high spatial resolution, but equally important is the wavelength range offered by the instruments on board HST, in particular the blue…

Astrophysics · Physics 2007-05-23 S. S. Larsen

The early evolution of star clusters in the Small Magellanic Cloud (SMC) has been the subject of significant recent controversy, particularly regarding the importance and length of the earliest, largely mass-independent disruption phase…

Astrophysics · Physics 2009-11-13 Richard de Grijs , Simon P. Goodwin

In this work we present preliminary results concerning the properties of about 50 clusters and associations located in a densely populated region at the Southern edge of the supershell LMC~4. The ages of the clusters and associations are…

Astrophysics · Physics 2007-05-23 A. Vallenari , A. Moretti , E. V. Held , L. Rizzi , D. Bettoni

We report the first results of a color-magnitude diagram survey of 25 candidate old LMC clusters. For almost all of the sample, it was possible to reach the turnoff region, and in many clusters we have several magnitudes of the main…

In this Letter, we analyse the distributions of stellar ages in Giant Molecular Clouds (GMCs) in spiral arms, inter-arm spurs, and at large galactic radii, where the spiral arms are relatively weak. We use the results of numerical…

Astrophysics of Galaxies · Physics 2015-06-17 C. L. Dobbs , J. E. Pringle , T. Naylor

The LMC has a rich star cluster system spanning a wide range of ages and masses. One striking feature of the LMC cluster system is the existence of an age gap between 3-10 Gyrs. But this feature is not as clearly seen among field stars.…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 E. Balbinot , B. X. Santiago , L. O. Kerber , B. Barbuy , B. M. S. Dias

We present the structural parameters of 99 Super Star Clusters (SSCs) in the Disk of M82. Moffat-EFF, King and Wilson models were fitted using a chi^2 minimisation method to background-subtracted Surface Brightness Profiles (SBPs) in F435W…

Astrophysics of Galaxies · Physics 2020-01-08 B. Cuevas-Otahola , Y. D. Mayya , I. Puerari , D. Rosa-Gonzalez