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200 papers

We present deep BVI CCD photometry of the stars in the dwarf galaxy DDO 210. The color-magnitude diagrams of DDO 210 show a well-defined red giant branch (RGB) and a blue plume. The tip of the RGB is found to be at I_TRGB = 20.95 +/- 0.10…

Astrophysics · Physics 2009-10-31 Myung Gyoon Lee , Antonio Aparicio , Nikolay Tikonov , Yong-Ik Byun , Eunhyeuk Kim

The spatial distribution of stellar populations, the star formation history, and other properties of the dIrr galaxy DDO 190 have been analyzed using color--magnitude diagrams (CMDs) of about 3900 resolved stars and the Ha fluxes of HII…

Astrophysics · Physics 2009-10-31 A. Aparicio , N. Tikhonov

Using new HST imaging, we identify a large, evolved system of super star clusters in a disk region just outside the starburst core in the prototypical starburst galaxy M82, ``M82 B.'' This region has been suspected to be a fossil starburst…

Astrophysics · Physics 2007-05-23 R. de Grijs , R. W. O'Connell , J. S. Gallagher

Recent images taken with the Hubble Space Telescope (HST) of the interacting disk galaxies NGC 4038/4039 (the Antennae) reveal clusters of many dozens and possibly hundreds of young compact massive star clusters within projected regions…

Astrophysics · Physics 2009-10-30 Pavel Kroupa

We compare the stellar populations and complex neutral gas dynamics of the M81 group dIrr galaxy DDO 165 using data from the HST and the VLA. Paper I identified two kinematically distinct HI components, multiple localized high velocity gas…

We present a study aimed at deriving constraints on star formation at intermediate ages from the evolved stellar populations in the dwarf irregular galaxy UKS2323-326. These observations were also intended to demonstrate the scientific…

This review aims to give an overview of the contribution of the Hubble Space Telescope to our understanding of the detailed properties of Local Group dwarf galaxies and their older stellar populations. The exquisite stable high spatial…

Astrophysics · Physics 2007-05-23 Eline Tolstoy

We investigate the relationship between the spatial distributions of stellar populations and of neutral and ionized gas in the Local Group dwarf irregular galaxy Sextans A. This galaxy is currently experiencing a burst of localized star…

Astrophysics · Physics 2009-10-30 Schuyler D. Van Dyk , Daniel Puche , Tony Wong

The formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive clusters with similar masses as globular clusters and may hold the key to understanding their formation. We study…

We present new deep $VI$ ground-based photometry of the Local Group dwarf galaxy Phoenix. Our results confirm that this galaxy is mainly dominated by red stars, with some blue plume stars indicating recent (100 Myr old) star formation in…

Astrophysics · Physics 2009-10-31 D. Martinez-Delgado , C. Gallart , A. Aparicio

Hubble Space Telescope (HST) colour - magnitude diagrams in B, V and R along with long-slit Multiple Mirror Telescope (MMT) spectrophotometric data are used to investigate the evolutionary status of the nearby blue compact dwarf (BCD)…

Astrophysics · Physics 2007-05-23 Y. I. Izotov , P. Papaderos , T. X. Thuan , K. J. Fricke , C. B. Foltz , N. G. Guseva

We resolve stars of the nearest giant elliptical galaxy NGC 5128 using VLT with FORS1 and ISAAC. We construct deep U, V and Ks color-magnitude and color-color diagrams in two different halo fields (in the halo and in the north-eastern…

Astrophysics · Physics 2009-11-07 M. Rejkuba , D. Minniti , D. R. Silva , T. R. Bedding

We present an all-sky catalog of 869 nearby galaxies, having individual distance estimates within 11 Mpc or corrected radial velocities V_{LG} < 600 km/s. The catalog is a renewed and expanded version of the "Catalog of Neighboring…

Cosmology and Nongalactic Astrophysics · Physics 2013-03-25 Igor D. Karachentsev , Dmitry I. Makarov , Elena I. Kaisina

A study of the stellar population of the M31 spiral arm around OB association A24 was carried out based on the photometric data obtained from deep V and JHK imaging. The luminosity function was obtained for -7 <~ Mbol <~ -3.5 by applying…

Astrophysics · Physics 2009-10-31 Keiichi Kodaira , Vladas Vansevicius , Motohide Tamura , Satoshi Miyazaki

We present deep, narrowband imaging of the nearby spiral galaxy M101 and its group environment to search for star-forming dwarf galaxies and outlying HII regions. Using the Burrell Schmidt telescope, we target the brightest emission lines…

Astrophysics of Galaxies · Physics 2021-07-14 Ray Garner , J. Christopher Mihos , Paul Harding , Aaron E. Watkins

We study the properties of the stellar populations in M81's outermost part, which hereafter we will term the stellar halo, using HST ACS/WFC observations of 19 fields from the GHOSTS survey. The observed fields probe the stellar halo out to…

We present a photometric study of M13 multiple stellar populations over a wide field of view, covering approximately 6.5 half-light radii, using archival Isaac Newton Telescope observations to build an accurate multi-band Str\"omgren…

Solar and Stellar Astrophysics · Physics 2017-12-06 A. Savino , D. Massari , A. Bragaglia , E. Dalessandro , E. Tolstoy

We present deep HST WFPC2 imaging of the Local Group dwarf irregular galaxy IC 1613. The photometry is the deepest to date for an isolated dwarf irregular galaxy. The resulting color-magnitude diagram (CMD) is analyzed using three different…

We present an analysis of the atomic hydrogen and stellar properties of 38 late-type galaxies in the local Universe covering a wide range of HI mass-to-light ratios (M_HI/L_B), stellar luminosities, and surface brightnesses. From these data…

Astrophysics · Physics 2009-06-23 Bradley E. Warren , Helmut Jerjen , Bärbel S. Koribalski

We present deep optical B, V, R images of a sample of 10 interacting systems which were selected for their resemblance to disturbed galaxies at high redshift. Photometry is performed on knots in the tidal features of the galaxies. We…

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