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We derive astrophysical parameters of the open cluster NGC 1513 by means of colour indices built with new $CCD\,UBV(RI)_{KC}$ photometry. Based on early-type members, the mean foreground reddening and total to selective extinction ratio are…

Astrophysics of Galaxies · Physics 2024-05-17 İnci Akkaya Oralhan , Hikmet Çakmak , Yüksel Karataş , Raúl Michel , Charles Bonatto

We investigate the loss of low-mass stars in two of the faintest globular clusters known, AM 4 and Palomar 13 (Pal 13), using HST/WFC3 F606W and F814W photometry. To determine the physical properties of each cluster --- age, mass,…

We present new medium-band uvby Stromgren and broad-band VI photometry for the central regions of the globular cluster Omega Cen. From this photometry we have obtained differential reddening estimates relative to two other globular clusters…

We use photometry in the F220W, F250W, F330W, F435W filters from the High Resolution Channel of the Advanced Camera for Surveys and photometry in the F555W, F675W, and F814W filters from the Wide Field and Planetary Camera 2 aboard the…

Astrophysics of Galaxies · Physics 2016-01-27 Xiaoying Pang , Anna Pasquali , Eva K. Grebel

Precision uvbyCaHbeta photometry of the nearby old open cluster, NGC 752, is presented. The mosaic of CCD fields covers an area ~42' on a side with internal precision at the 0.005 to 0.010 mag level for the majority of stars down to V~15.…

Solar and Stellar Astrophysics · Physics 2015-10-14 B. A. Twarog , B. J. Anthony-Twarog , C. P. Deliyannis , D. T. Thomas

We perform a detailed study of the Globular Cluster (GC) system in the galaxy NGC5866 based on F435W, F555W, and F625W (~ B, V, and R) HST Advanced Camera for Surveys images. Adopting color, size and shape selection criteria, the final list…

Astrophysics · Physics 2015-05-13 Cantiello , Michele , Blakeslee , John P. , Raimondo , Gabriella

We report on the properties of 89 low mass star clusters located in the vicinity of luminous young clusters (blue globulars) in the disk of M31. 82 of the clusters are newly detected. We have determined their integrated magnitudes and…

Astrophysics of Galaxies · Physics 2015-05-13 P. W. Hodge , O. K. Krienke , M. Bellazzini , S. Perina , P. Barmby , J. G. Cohen , T. H. Puzia , J. Strader

We present deep CCD photometry in the VI passbands using the WIYN 3.5m telescope of a field located approximately 20' southeast of the center of M33; this field includes the region studied by Mould & Kristian in their 1986 paper. The…

Astrophysics · Physics 2009-11-10 Glenn P. Tiede , Ata Sarajedini , Michael K. Barker

We report the first results from deep ACS imaging of ten classical globular clusters in the far outer regions (15 < R_p < 100 kpc) of M31. Eight of the clusters, including two of the most remote M31 globular clusters presently known, are…

We present proper motion (PM) measurements within the central region of the Large Magellanic Cloud (LMC) using near-infrared data from the VISTA survey of the Magellanic Cloud system (VMC). This work encompasses 18 VMC tiles covering a…

Differential $E_{V-I}$ variations of up to $\sim 0.2$ mag on a scale of arcminutes across NGC 3201 are presented in the form of an extinction map. This map, created by calculating average $E_{V-I}$ values for stars in small subregions of…

Astrophysics · Physics 2009-10-31 Kaspar von Braun , Mario Mateo

Archival Vilnius CCD photometric observations are presented for the heavily reddened star cluster Melotte 105, resulting in colour-magnitude diagrams and spectral class estimates. There is considerable lack of agreement between studies for…

Solar and Stellar Astrophysics · Physics 2020-03-18 Timothy Banks , Talar Yontan , Selcuk Bilir , Remziye Canbay

We have derived a new photographic photometry and proper motions for 20000 stars with completeness to V = 18 in the direction of galactic center at the intermediate latitude (l = 3 deg,b = 47 deg; alpha(1950)=15h 18m, delta(1950) = +02deg…

Astrophysics · Physics 2007-05-23 D. K. Ojha , O. Bienayme , A. C. Robin , V. Mohan

HST-WFPC2 F555W and F814W photometry were obtained for 16 fields of the luminous nearby spiral galaxy M31, sampling the stellar content of the disk and the halo at different distances from the center, from ~ 20 to ~ 150 arcmin (i.e. ~ 4.5…

Astrophysics · Physics 2011-07-18 M. Bellazzini , C. Cacciari , L. Federici , F. Fusi Pecci , R. M. Rich

A detailed imaging analysis of the globular cluster (GC) system of the Sombrero galaxy (NGC 4594) has been accomplished using a six-image mosaic from the Hubble Space Telescope Advanced Camera for Surveys. The quality of the data is such…

Astrophysics · Physics 2008-11-26 L. R. Spitler , S. S. Larsen , J. Strader , J. P. Brodie , D. A. Forbes , M. A. Beasley

With the aim of increasing the sample of M31 clusters for which a colour magnitude diagram is available, we searched the HST archive for ACS images containing objects included in the Revised Bologna Catalogue of M31 globular clusters.…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Sibilla Perina , Luciana Federici , Michele Bellazzini , Carla Cacciari , Flavio Fusi Pecci , Silvia Galleti

The paper investigates the properties of the dust mass loss in stars populating the giant branch of the globular cluster 47 Tuc, by combining ISOCAM and DENIS data. Raster maps of 5 fields covering areas ranging from 4 x 4 to 15 x 15…

Astrophysics · Physics 2010-02-18 A. Ramdani , A. Jorissen

This paper compares reddening values E(B-V) derived from the stellar content of 103 old open clusters and 147 globular clusters of the Milky Way with those derived from DIRBE/IRAS 100 micron dust emission in the same directions. Star…

Astrophysics · Physics 2007-05-23 C. M. Dutra , E. Bica

We present multiwavelength optical linear polarimetric observations of 69 stars toward the young open cluster Be 59. The observations reveal the presence of three dust layers located at the distances of \sim300, \sim500 and \sim700 pc. The…

Solar and Stellar Astrophysics · Physics 2015-05-30 C. Eswaraiah , A. K. Pandey , G. Maheswar , W. P. Chen , D. K. Ojha , H. C. Chandola