Results 61 to 70 of about 11,751 (112)

Virgo Early-Type Dwarfs in ALFALFA

, 2007
Early-type dwarf galaxies dominate cluster populations, but their formation and evolutionary histories are poorly understood. The ALFALFA (Arecibo Legacy Fast ALFA) survey has completed observations of the Virgo Cluster in the declination range of 6 - 16
Binggeli, Rebecca A. Koopmann
core   +1 more source

Identifying Old Tidal Dwarf Irregulars [PDF]

, 2000
We examine the observational consequences of the two possible origins for irregular galaxies: formation from collapse of a primordial cloud of gas early in the age of the Universe, and formation from tidal tails in an interaction that could have occured ...
Bottinelli L., Broeils A. H., de Blok W. J. G., Deidre A. Hunter, Duc P.-A., Edmunds M. G., Erin W. Roye, Ferraro F. R., Israel F., Lee H., McIntyre V. J., Mirabel I. F., Mirabel I. F., Sally D. Hunsberger, Skillman E. D., Tully R. B., Zwicky F.   +16 more
core   +3 more sources

BVR photometry of the resolved dwarf galaxy Ho IX

, 2004
We present BVR CCD photometry down to limiting magnitude B=23.5 mag for 232 starlike objects and 11 diffuse objects in a 5.4' x 5.4' field of Ho IX. The galaxy is a gas-rich irregular dwarf galaxy possibly very close to M 81, which makes it especially ...
Aparicio, Bertelli, Bomans, Christian, D. J. Bomans, Davidge, Fernie, Fitzpatrick, Flower, Freedman, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Georgiev, Heydari-Malayeri, Hill, Hopp, Hopp, Humphreys, Karachentsev, Karachentsev, Makarova, Makarova, Metcalfe, Miller, Notni, Perelmuter, Roberts, Sandage, Sandage, Stetson, Straizys, T. B. Georgiev, Treffers, Vallenari, Yun   +40 more
core   +1 more source

The rotation curves shapes of late-type dwarf galaxies [PDF]

, 2008
We present rotation curves derived for a sample of 62 late-type dwarf galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project.
Begeman, Begum, Blais-Ouellette, Bosma, Bosma, Bottema, Broeils, Bullock, Casertano, Catinella, Corradi, Côté, de Blok, de Blok, de Blok, de Blok, Ford, García-Ruiz, Garrido, Hunter, J. M. van der Hulst, Kent, Kent, Kregel, Kuzio de Naray, Marchesini, McGaugh, Navarro, Navarro, Noordermeer, Persic, Persic, Power, Puche, R. A. Swaters, R. Sancisi, Rhee, Rubin, Sancisi, Sicotte, Sicotte, Simon, Spekkens, Spekkens, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, T. S. van Albada, Tully, van den Bosch, van den Bosch, Verheijen   +55 more
core   +2 more sources

Star formation in dwarf irregular galaxies NGC 6822

The Astronomical Journal, 1995
plain Tex format; for hardcopy of figures and tables 2 and 3 contact Tosi@astbo3.bo.astro.it; BAP 09-1994-023 ...
Marconi, G., Tosi, M., Greggio, L., Focardi, P.   +3 more
openaire   +2 more sources

Kinematics of the Ionized Gas in Dwarf Irregular Galaxies [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractSome preliminary results focused on the kinematics and dynamics of the ionized gas in the Local Group dwarf irregular galaxy IC10 are presented.
Margarita Valdez-Gutiérrez, Margarita Rosado   +1 more
openaire   +1 more source

Stellar Populations in the Local Group of Galaxies

, 2005
The characteristics and properties of the stellar populations and evolutionary histories of Local Group galaxies are summarized and compared to predictions of cosmological models.
Grebel, Eva K.
core   +2 more sources

Stellar Abundances in Dwarf Irregular Galaxies

, 2003
Dwarf irregular galaxies appear to have undergone very slow chemical evolution since they have low nebular abundances, but have had ongoing star formation over the past 15 Gyr. They are too distant for red giant abundance analyses to examine the details of their chemical evolution, however the isolated, bright blue supergiants do allow us to determine ...
Venn, K.A., Tolstoy, E., Kaufer, A., Kudritzki, R.P.   +3 more
openaire   +3 more sources

The ACS LCID Project: On the origin of dwarf galaxy types: a manifestation of the halo assembly bias? [PDF]

, 2015
We discuss how knowledge of the whole evolutionary history of dwarf galaxies, including details on the early star formation events, can provide insight on the origin of the different dwarf galaxy types. We suggest that these types may be imprinted by the
Aparicio, A., Battaglia, G., Bernard, E. J., Cassisi, S., Cole, A. A., Dolphin, A. E., Drozdovsky, I., Gallart, C., HIdalgo, S. L., Mayer, L., Monelli, M., Navarro, J. F., Salvadori, S., Skillman, E. D., Stetson, P. B., Weisz, D. R.   +15 more
core   +4 more sources

Neutral Gas Distributions and Kinematics of Five Blue Compact Dwarf Galaxies [PDF]

, 1998
We present the results of high spatial resolution HI observations of five intrinsically compact dwarf galaxies which are currently experiencing a strong burst of star formation.
Salzer, J. J., Skillman, E. D., van Zee, L.   +2 more
core   +2 more sources