Results 151 to 160 of about 170,345 (283)

VARIABLE STARS IN THE ULTRA-FAINT DWARF SPHEROIDAL GALAXY URSA MAJOR I [PDF]

, 2013
We have performed the first study of the variable star population of Ursa Major I (UMa I), an ultra-faint dwarf satellite recently discovered around the Milky Way (MW) by the Sloan Digital Sky Survey.
A. Garofalo, F. Cusano, G. Clementini, V. Ripepi, M. Dall’ora, M. Moretti, G. Coppola, I. Musella, M. Marconi   +8 more
semanticscholar   +1 more source

The star formation and chemical evolution history of the Fornax dwarf spheroidal galaxy [PDF]

, 2012
We have combined deep photometry in the B, V and I bands from CTIO/MOSAIC of the Sculptor dwarf spheroidal galaxy, going down to the oldest main sequence turn-offs, with spectroscopic metallicity distributions of red giant branch stars. This allows us to
T. D. Boer, E. Tolstoy, V. Hill, A. Saha, E. Olszewski, M. Mateo, E. Starkenburg, G. Battaglia, M. Walker   +8 more
semanticscholar   +1 more source

Dwarf Spheroidal Galaxies and Globular Clusters [PDF]

Symposium - International Astronomical Union, 1988
Recent observational results for dwarf spheroidal galaxies are reviewed and discussed. In particular, the differences in stellar populations between dwarf spheroidal galaxies and globular clusters are highlighted. It seems most probable that the origin and evolution of dwarf spheroidal galaxies was very different from that of globular clusters.
openaire   +2 more sources

VERITAS deep observations of the dwarf spheroidal galaxy Segue 1 [PDF]

, 2012
The VERITAS array of Cherenkov telescopes has carried out a deep observational program on the nearby dwarf spheroidal galaxy Segue 1. We report on the results of nearly 48 hours of good quality selected data, taken between January 2010 and May 2011.
E. Aliu, S. Archambault, T. Arlen, T. Aune, M. Beilicke, W. Benbow, A. Bouvier, S. Bradbury, J. Buckley, V. Bugaev, K. Byrum, A. Cannon, A. Cesarini, J. Christiansen, L. Ciupik, E. Collins-Hughes, M. Connolly, W. Cui, G. Decerprit, R. Dickherber, J. Dumm, M. Errando, A. Falcone, Q. Feng, F. Ferrer, J. Finley, G. Finnegan, L. Fortson, A. Furniss, N. Galante, D. Gall, S. Godambe, S. Griffin, J. Grube, G. Gyuk, D. Hanna, J. Holder, H. Huan, G. Hughes, T. Humensky, P. Kaaret, N. Karlsson, M. Kertzman, Y. Khassen, D. Kieda, H. Krawczynski, F. Krennrich, K. Lee, A. Madhavan, G. Maier, P. Majumdar, S. McArthur, A. McCann, P. Moriarty, R. Mukherjee, R. Ong, M. Orr, A. Otte, N. Park, J. Perkins, M. Pohl, H. Prokoph, J. Quinn, K. Ragan, L. Reyes, P. Reynolds, E. Roache, H. Rose, J. Ruppel, D. B. Saxon, M. Schroedter, G. Sembroski, G. D. Senturk, C. Skole, A. Smith, D. Staszak, I. Telezhinsky, G. Tesic, M. Theiling, S. Thibadeau, K. Tsurusaki, A. Varlotta, V. Vassiliev, S. Vincent, M. Vivier, R. Wagner, S. Wakely, J. Ward, T. Weekes, A. Weinstein, T. Weisgarber, D. Williams, B. Zitzer, F. C. Collaboration   +93 more
semanticscholar   +1 more source

Ultradiffuse Galaxies—A Distinct Population? Dwarf Galaxies in the Coma Cluster and A262 from Deep u′–g′–r′ Wendelstein Imaging Data

The Astrophysical Journal Supplement Series
In this study, we compare the structural parameters of ultradiffuse galaxies (UDGs) to those of other dwarf galaxies and investigate whether UDGs form a distinct population.
Raphael Zöller, Matthias Kluge, Benjamin Staiger, Ralf Bender   +3 more
doaj   +1 more source

The extremely low-metallicity tail of the Sculptor dwarf spheroidal galaxy [PDF]

, 2012
We present abundances for seven stars in the (extremely) low-metallicity tail of the Sculptor dwarf spheroidal galaxy, from spectra taken with X-shooter on the ESO VLT. Targets were selected from the Ca II triplet (CaT) survey of the dwarf abundances and
E. Starkenburg, V. Hill, E. Tolstoy, P. François, M. Irwin, L. Boschman, K. Venn, T. D. Boer, B. Lemasle, P. Jablonka, G. Battaglia, P. Groot, L. Kaper   +12 more
semanticscholar   +1 more source

γ-ray and ν Searches for Dark-Matter Subhalos in the Milky Way with a Baryonic Potential

Galaxies, 2019
The distribution of dark-matter (DM) subhalos in our galaxy remains disputed, leading to varying γ -ray and ν flux predictions from their annihilation or decay.
Moritz Hütten, Martin Stref, Céline Combet, Julien Lavalle, David Maurin   +4 more
doaj   +1 more source

The Andromeda Dwarf Spheroidal Galaxies [PDF]

in "The Stellar Content of Local Group Galaxies", IAU Symposium 192, ed. P. Whitelock & R. Cannon, page 203 (1999), 1998
Our current knowledge of M31's dwarf spheroidal companions is reviewed. Two topics of recent interest constitute the bulk of this review. First, color-magnitude diagrams reaching below the horizontal branch have been constructed for two M31 dwarf spheroidals based on images from HST/WFPC2. The horizontal branches are predominantly red in both galaxies,
arxiv  

Dwarf spheroidal galaxies in nearby groups imaged with HST [PDF]

, 2005
An all-sky list of 88 nearby dwarf spheroidal (dSph) galaxies with distances D < 10 Mpc is considered. Most of the objects have recently been found by Karachentseva & Karachentsev based on POSSII/ESO-SERC survey. A hundred more dSph galaxies are expected in this volume, being missed so far because of their low luminosity and low surface brightness ...
arxiv   +1 more source

STELLAR KINEMATICS OF THE ANDROMEDA II DWARF SPHEROIDAL GALAXY [PDF]

, 2012
We present kinematical profiles and metallicity for the M31 dwarf spheroidal (dSph) satellite galaxy Andromeda II (And II) based on Keck DEIMOS spectroscopy of 531 red giant branch stars.
Nhung Ho, M. Geha, R. Muñoz, P. Guhathakurta, J. Kalirai, K. Gilbert, E. Tollerud, James S. Bullock, Rachael L. Beaton, S. Majewski   +9 more
semanticscholar   +1 more source