Results 131 to 140 of about 23,012 (280)

Spatial dependence of the star formation history in the central regions of the Fornax dwarf spheroidal galaxy [PDF]

, 2013
We present the Star Formation History (SFH) and the age-metallicity relation (AMR) in three fields of the Fornax dwarf spheroidal galaxy. They sample a region spanning from the centre of the galaxy to beyond one core radius, which allows studying ...
A. Pino, S. Hidalgo, A. Aparicio, C. Gallart, R. Carrera, M. Monelli, R. Buonanno, G. Marconi   +7 more
semanticscholar   +1 more source

A COMPREHENSIVE, WIDE-FIELD STUDY OF PULSATING STARS IN THE CARINA DWARF SPHEROIDAL GALAXY [PDF]

, 2013
We report the detection of 388 pulsating variable stars (and some additional miscellaneous variables) in the Carina dwarf spheroidal galaxy over an area covering the full visible extent of the galaxy and extending a few times beyond its photometric (King)
A. K. Vivas, M. Mateo
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

Elemental Abundances in And XIX from Coadded Spectra

The Astrophysical Journal
With a luminosity similar to that of Milky Way dwarf spheroidal systems like Sextans, but a spatial extent similar to that of ultra-diffuse galaxies, Andromeda (And) XIX is an unusual satellite of M31. To investigate the origin of this galaxy, we measure
L. R. Cullinane, Karoline M. Gilbert, Ivanna Escala, J. Leigh Wojno, Evan N. Kirby, Kateryna A. Kvasova, Erik Tollerud, Michelle L. M. Collins, R. Michael Rich   +8 more
doaj   +1 more source

A new study of stellar substructures in the Fornax dwarf spheroidal galaxy [PDF]

, 2013
Using deep V, B - V wide-field photometry, we have conducted a new study of stellar over-densities in the Fornax dwarf spheroidal galaxy by determining detailed star formation histories from colour-magnitude diagram analysis.
T. D. Boer, E. Tolstoy, A. Saha, E. Olszewski   +3 more
semanticscholar   +1 more source

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

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

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