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In the Large Magellanic Cloud (LMC), there have been very few clusters observed with ages between 4 and 11 Gyr. This phenomenon is sometimes referred to as the `LMC age gap'. We constructed a model of the cluster age distribution aimed at…

Astrophysics of Galaxies · Physics 2026-05-12 Jonathan H. Klos , Andrés E. Piatti

We present V, V-I color-magnitude diagrams (CMDs) for three old star clusters in the Large Magellanic Cloud (LMC): NGC 1466, NGC 2257 and Hodge 11. Our data extend about 3 magnitudes below the main-sequence turnoff, allowing us to determine…

Astrophysics · Physics 2009-10-31 J. A. Johnson , M. Bolte , P. B. Stetson , J. E. Hesser , R. S. Somerville

Colour-magnitude diagrams are presented for the first time for L32, L38, K28 (L43), K44 (L68) and L116, which are clusters projected onto the outer parts of the Small Magellanic Cloud (SMC). The photometry was carried out in the Washington…

Astrophysics · Physics 2009-11-06 A. E. Piatti , J. F. C. Santos , J. J. Claria , E. Bica , A. Sarajedini , D. Geisler

We used a combination of optical and near-UV Hubble Space Telescope photometry and FLAMES/ESO-VLT high-resolution spectroscopy to characterize the stellar content of the old and massive globular cluster (GC) NGC121 in the Small Magellanic…

Solar and Stellar Astrophysics · Physics 2016-10-05 E. Dalessandro , E. Lapenna , A. Mucciarelli , L. Origlia , F. R. Ferraro , B. Lanzoni

We present results based on YJKs photometry of star clusters located in the outermost, eastern region of the Small Magellanic Cloud (SMC). We analysed a total of 51 catalogued clusters whose colour--magnitude diagrams (CMDs), having been…

Astrophysics of Galaxies · Physics 2015-06-24 A. E. Piatti , R. de Grijs , S. Rubele , M. R. Cioni , V. Ripepi , L. Kerber

We present the serendipitous discovery of 195 extragalactic globular clusters (GCs) in one of the deepest optical images ever obtained, a 126 orbit HST/ACS imaging study of the nearby Galactic GC NGC 6397. The distant GCs are all found…

Astrophysics · Physics 2009-11-13 Jasonjot S. Kalirai , Jay Strader , Harvey B. Richer , Jay Anderson

We present results of new photometry for the globular star cluster NGC 2155 in the Large Magellanic Cloud (LMC). Our I- and V-band observations were obtained with the 6.5-meter Magellan 1 Baade Telescope at Las Campanas Observatory…

Solar and Stellar Astrophysics · Physics 2011-06-07 M. Otulakowska , A. Olech , W. Pych , A. A. Pamyatnykh , T. Zdravkov , S. M. Rucinski

The uncertainties in the modelling of some important inputs of stellar evolution must be taken into account for a correct interpretation, both of the HR diagrams of individual stars, and of the integrated colors, of stellar clusters. After…

Astrophysics · Physics 2007-05-23 F. D'Antona

It is now well established that globular clusters (GCs) exhibit star-to-star light-element abundance variations (known as multiple stellar populations, MPs). Such chemical anomalies have been found in (nearly) all the ancient GCs (more than…

(Abridged) We present the results of photometric measurements from images of the LMC globular clusters NGC 1928, 1939 and Reticulum taken with ACS on HST. F555W and F814W exposures result in high accuracy CMDs for these three clusters. This…

Astrophysics · Physics 2009-11-10 A. D. Mackey , G. F. Gilmore

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 present Washington C, T1 CCD photometry of 21 fields located in the northern part of the Large Magellanic Cloud (LMC), and spread over a region of more than 2.52 degrees approximately 6 degrees from the bar. The surveyed areas were…

Astrophysics · Physics 2009-10-31 A. E. Piatti , D. Geisler , E. Bica , J. J. Claria , J. F. C. Santos , A. Sarajedini , H. Dottori

The huge photometric databases that are being created for stars in the Magellanic Clouds and in Local Group galaxies not only allow detailed study of the star formation history of these systems, but also provide important information on…

Astrophysics · Physics 2009-10-30 Carme Gallart

The Magellanic Clouds are nearby dwarf irregular galaxies whose morphologies show different properties when traced by different stellar populations, making them an important laboratory for studying galaxy morphologies. We study the…

The age distribution function of star clusters in the Large Magellanic Cloud (LMC) is known to present a feature called the cluster age gap, a period of time from ~ 4 to 11 Gyr ago with a remarkable small number of clusters identified. In…

Astrophysics of Galaxies · Physics 2025-07-28 Andrés E. Piatti

Intermediate-age star clusters in the Magellanic Clouds harbour signatures of the multiple stellar populations long thought to be restricted to old globular clusters. We compare synthetic horizontal branch models with Hubble Space Telescope…

Solar and Stellar Astrophysics · Physics 2019-02-13 W. Chantereau , M. Salaris , N. Bastian , S. Martocchia

We present our analysis of Hubble Space Telescope Wide Field Planetary Camera 2 observations in F555W (broadband V) and F450W (broadband B) of the globular cluster Hodge 11 in the Large Magellanic Cloud galaxy. The resulting V vs. (B-V)…

Astrophysics · Physics 2009-10-28 K. J. Mighell , R. M. Rich , M. Shara , S. M. Fall

We present a detailed abundance analysis of giant stars in NGC 1978, a massive, intermediate-age stellar cluster in the Large Magellanic Cloud, characterized by a high ellipticity and suspected to have a metallicity spread. We analyzed 11…

Astrophysics · Physics 2009-11-11 Francesco R. Ferraro , Alessio Mucciarelli , Eugenio Carretta , Livia Origlia

We examine four ancient Large Magellanic Cloud (LMC) globular clusters (GCs) for evidence of multiple stellar populations using the Advanced Camera for Surveys and Wide Field Camera 3 on the Hubble Space Telescope Programme GO-14164. NGC…

In the context of the study of the size-age relationship observed in star clusters in the Large Magellanic Cloud and the investigation of its origin, here we present the determination of the structural parameters and the dynamical age of…