An HST/WFPC2 survey of bright young clusters in M31. IV. Ages and mass estimates (2009)
Perina, S., Cohen, J. G., Barmby, P., Beasley, M. A., Bellazzini, M., Brodie, J. P., ...
{Aims.} We present the main results of an imaging survey of possible young massive clusters (YMC) in M31 performed with the Wide Field and Planetary Camera2 (WFPC2) on the Hubble Space Telescope...
An HST/WFPC2 Survey of Bright Young Clusters in M31 III. Structural Parameters (2009)
Barmby, P., Perina, S., Bellazzini, M., Cohen, J. G., Hodge, P. W., Huchra, J. P., ...
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...
Hodge, P. W., Krienke, O. K., Bellazzini, M., Perina, S., Barmby, P., Cohen, J. G., ...
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. Eighty-two of the clusters are newly detected. We...
Hodge, P. W., Krienke, O. K., Bellazzini, M., Perina, S., Barmby, P., Cohen, J. G., ...
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...
Perina, S., Barmby, P., Beasley, M. A., Bellazzini, M., Brodie, J. P., Burstein, D., ...
Aims. We introduce our imaging survey of possible young massive globular clusters in M31 performed with the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope (HST). We obtained...
Perina, S., Barmby, P., Beasley, M. A., Bellazzini, M., Brodie, J. P., Burstein, D., ...
{Aims.} We introduce our imaging survey of possible young massive globular clusters in M31 performed with the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope (HST). We present...
Ionized and neutral gas in the peculiar star/cluster complex in NGC 6946 (2007)
Efremov, Yu. N., Afanasiev, V. L., Alfaro, E. J., Boomsma, R., Bastian, N., Larsen, S., ...
The characteristics of ionized and HI gas in the peculiar star/cluster complex in NGC 6946, obtained with the 6-m telescope (BTA) SAO RAS, the Gemini North telescope, and the Westerbork Synthesis...
An HST Survey of the Disk Cluster Population of M31. I. WFPC2 Pointings (2007)
A survey of 49 HST WFPC2 pointings in M31 has resulted in a photometric catalog of 344 disk clusters ("open clusters"). We have analyzed the color-magnitude diagram, the luminosity function, the size...
Supersoft X-ray sources in M31. I. A Chandra survey and an extension to quasi-soft sources (2004)
Di Stefano, R., Kong, A. K. H., Greiner, J., Primini, F. A., Garcia, M. R., Barmby, P., ...
Supersoft X-ray Sources in M31: I. A Chandra Survey and an Extension to Quasisoft Sources (2003)
Di Stefano, R., Kong, A. K. H., Greiner, J., Primini, F. A., Garcia, M. R., Barmby, P., ...
We report on very soft X-ray sources (VSSs) in M31. In a survey which was most sensitive to soft sources in four 8'x8' regions covered by Chandra's ACIS-S S3 CCD, we find 33 VSSs that appear to...
Distances to Nearby Galaxies in Sculptor (2003)
Karachentsev, I. D., Grebel, E. K., Sharina, M. E., Dolphin, A. E., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a...
Distances to nearby galaxies in sculptor (2003)
Karachentsev, I.D., Grebel, E.K., Sharina, M.E., Dolphin, A.E., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a...
Local galaxy flows within 5 Mpc (2003)
Karachentsev, I.D., Makarov, D.I., Sharina, M.E., Dolphin, A.E., Grebel, E.K., Geisler, D., ...
Galaxy flow in the Canes Venatici I cloud (2003)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of eighteen galaxies in the Canes Venatici I cloud. We derive their distances from the luminosity of the tip of the red giant branch...
Tidal dwarfs in the M81 group: The second generation? (2003)
Makarova, L., Grebel, E.K., Karachentsev, I.D., Dolphin, A.E., Karachentseva, V.E., Sharina, M.E., ...
The Outer Edges of Dwarf Irregular Galaxies: Stars and Gas (2002)
Hodge, P. W., Hunter, D. A., Oey, M. S.
We have in recent years come to view dwarf galaxy evolution in the broader context of the cosmic evolution of large-scale structure. Dwarf galaxies, as the putative building blocks of hierarchical...
Local galaxy flows within 5 Mpc (2002)
Karachentsev, I. D., Makarov, D. I., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates. We derive their distances from the luminosity of the tip of the...
Galaxy Flow in the Canes Venatici I Cloud (2002)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of eighteen galaxies in the Canes Venatici I cloud. We derive their distances from the luminosity of the tip of the red giant branch...
Tidal dwarfs in the M81 group: the second generation? (2002)
Makarova, L. N., Grebel, E. K., Karachentsev, I. D., Dolphin, A. E., Karachentseva, V. E., Sharina, M. E., ...
We derive quantitative star formation histories of the four suspected tidal dwarf galaxies in the M81 group, HolmbergIX, BK3N, Arp-loop (A0952+69), and Garland, using Hubble Space Telescope/Wide...
6-m Telescope Spectroscopic Observations of The Bubble Complex in NGC 6946 (2002)
Efremov, Yu. N., Pustilnik, S. A., Kniazev, A. Y., Elmegreen, B. G., Larsen, S. S., Alfaro, E. J., ...
We describe the results of a long-slit spectroscopic study of an unusual star complex in the nearby spiral galaxy NGC 6946 using the SAO 6-m telescope and the Keck 10-m telescope. The complex...
The very local Hubble flow (2002)
Karachentsev, I. D., Sharina, M. E., Makarov, D. I., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
We present Hubble Space Telescope/WFPC2 images of eighteen galaxies situated in the vicinity of the Local Group (LG) as part of an ongoing snapshot survey of nearby galaxies. Their distances derived...
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy (2002)
Sarajedini, A., Grebel, E. K., Dolphin, A. E., Seitzer, P., Geisler, D., Guhathakurta, P., ...
The M 81 group of galaxies: New distances, kinematics and structure (2002)
Karachentsev, I. D., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., Hodge, P. W., ...
New distances to galaxies in the Centaurus A group (2002)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
The very local Hubble flow (2002)
Karachentsev, I. D., Sharina, M. E., Makarov, D. I., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
6-m Telescope Spectroscopic Observations of the Bubble Complex in NGC 6946 (2002)
Efremov, Yu. N., Pustilnik, S. A., Kniazev, A. Y., Elmegreen, B. G., Larsen, S. S., Alfaro, E. J., ...
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy (2001)
Sarajedini, A., Grebel, E. K., Dolphin, A. E., Seitzer, P., Geisler, D., Guhathakurta, P., ...
We present Hubble Space Telescope Wide Field Planetary Camera 2 photometry in the V and I passbands of the recently discovered Local Group dwarf spheroidal galaxy in Cetus. Our color-magnitude...
Hubble Space Telescope imaging of a peculiar stellar complex in NGC 6946 (2001)
Larsen, S. S., Efremov, Yu. N., Elmegreen, B. G., Alfaro, E. J., Battinelli, P., Hodge, P. W., ...
The stellar populations in a stellar complex in NGC 6946 are analyzed on images taken with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The complex is peculiar by its very...
A new galaxy near the Local Group in Draco (2001)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., ...
We present HST WFPC2 and ground-based images of the low surface brightness dwarf Irr/Sph galaxy KKR~25 in Draco. Its colour-magnitude diagram shows red giant branch stars with the tip at I = 22.32...
Old Stellar Populations of the Small Magellanic Cloud (2001)
Dolphin, A. E., Walker, A. R., Hodge, P. W., Mateo, M., Olszewski, E. W., Schommer, R. A., ...
We present WFPC2 and ground-based VI photometry of NGC 121 and a nearby field in the outer SMC. For NGC 121, we measure a true distance modulus of (m-M)0 = 18.96 +/- 0.04 (distance of 61.9 +/- 1.1...
WFPC2 Observations of Two dSph Galaxies in the M81 Group (2001)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Hodge, P. W., ...
We have obtained HST WFPC2 and ground-based images of two low surface brightness dwarf spheroidal galaxies in the M81 group, FM1 and KKH57. Their colour-magnitude diagrams show red giant branches...
Structure and Mass of a Young Globular Cluster in NGC 6946 (2001)
Larsen, S. S., Brodie, J. P., Elmegreen, B. G., Efremov, Y. N., Hodge, P. W., Richtler, T.
Using the Wide Field Planetary Camera 2 on board the Hubble Space Telescope, we have imaged a luminous young star cluster in the nearby spiral galaxy NGC 6946. The cluster has an absolute visual...
The Stellar Content and Distance of UGC 4483 (2000)
Dolphin, A. E., Makarova, L., Karachentsev, I. D., Karachentseva, V. E., Geisler, D., Grebel, E. K., ...
We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V ~ 26.0 and I ~ 24.7. We measure...
Dwarf Spheroidal Galaxies in the M81 Group Imaged with WFPC2 (2000)
Karachentsev, I. D., Karachentseva, V. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., ...
We obtained HST/WFPC2 images of the dwarf spheroidal (dSph) galaxies K61, K63, K64, DDO78, BK6N, and kk77 in the M81 group. Our color-magnitude diagrams show red giant branches with tips (TRGB)...
A Dwarf Galaxy Survey in the Local Volume (2000)
Grebel, E. K., Seitzer, P., Dolphin, A. E., Geisler, D., Guhathakurta, P., Hodge, P. W., ...
We are carrying out a comprehensive multi-wavelength study of dwarf galaxies in the Local Volume (< 5 Mpc). After our all-sky survey more than doubled the dwarf census we are now measuring structural...
Large scale star formation in galaxies. I. The spirals NGC 7217, NGC 1058 and UGC 12732 (2000)
Battinelli, P., Capuzzo-Dolcetta, R., Hodge, P. W., Vicari, A., Wyder, T. K.
We present multiband photometric observations of three spiral galaxies selected in a sample suited for the study of young stellar groupings and their relationship with the parent galaxy and the...
The dwarf spheroidal galaxy DDO 44: stellar populations and distance (1999)
Karachentsev, I. D., Sharina, M. E., Grebel, E. K., Dolphin, A. E., Geisler, D., Guhathakurta, P., ...
We present ground-based and HST WFPC2 imaging of the nearby low surface brightness dwarf spheroidal galaxy DDO 44. For the first time DDO 44 was resolved into stars. The resulting color-magnitude...
HST observations of the Local Group dwarf galaxy Leo I (1998)
Gallart, C., Freedman, W. L., Mateo, M., Chiosi, C., Thompson, I. B., Aparicio, A., ...
We present deep HST F555W (V) and F814W (I) observations of a central field in the Local Group dwarf spheroidal (dSph) galaxy Leo I. The resulting color-magnitude diagram (CMD) reaches I \simeq 26...
HST Colour-Magnitude Diagrams of Six Old Globular Clusters in the LMC (1998)
Olsen, K. A. G., Hodge, P. W., Mateo, M., Olszewski, E. W., Schommer, R. A., Suntzeff, N. B., ...
We report on HST observations of six candidate old globular clusters in the Large Magellanic Cloud: NGC 1754, NGC 1835, NGC 1898, NGC 1916, NGC 2005 and NGC 2019. Deep exposures with the F555W and...
Giant Shells and Stellar Arcs as Relics of Gamma Ray Burst Explosions (1998)
Efremov, Y. N., Elmegreen, B. G., Hodge, P. W.
Gamma Ray Burst (GRB) explosions are powerful and frequent enough to make kiloparsec-size shells and holes in the interstellar media of spiral galaxies. The observations of such remnants are...
ROSAT HRI observations of the Local Group galaxies IC 10, NGC 147 and NGC 185 (1997)
Brandt, W. N., Ward, M. J., Fabian, A. C., Hodge, P. W.
We report on pointed X-ray observations of IC 10, NGC 147 and NGC 185 made with the ROSAT High Resolution Imager (HRI). These are three Local Group galaxies that have never been previously studied in...
New Automatic Identification Technique for OB Associations in Unresolved Galaxies (1994)
Adanti, S., Battinelli, P., Hodge, P. W.
We present a new automatic technique based on Principal Component Analysis and Cluster Analysis, with the aim of its application to the identification of those clumps in unresolved galaxies which...