Results 21 to 30 of about 23,012 (280)

Dwarfs in Void Environments (DIVE): The Stellar Kinematics of Void Dwarf Galaxies Using the Keck Cosmic Web Imager

The Astrophysical Journal, 2023
Dwarf galaxies located in extremely underdense cosmic voids are excellent test beds for disentangling the effects of large-scale environments on galaxy formation and evolution. We present the first results of the Dwarfs in Void Environments Survey, which
Mithi A. C. de los Reyes, Evan N. Kirby, Zhuyun Zhuang, Charles C. Steidel, Yuguang Chen, Coral Wheeler   +5 more
doaj   +1 more source

Stellar 3D kinematics in the Draco dwarf spheroidal galaxy [PDF]

Astronomy & Astrophysics, 2019
Aims. We present the first three-dimensional internal motions for individual stars in the Draco dwarf spheroidal galaxy. Methods. By combining first-epoch Hubble Space Telescope observations and second-epoch Gaia Data Release 2 positions, we measured the
D. Massari, A. Helmi, A. Mucciarelli, L. Sales, L. Spina, E. Tolstoy   +5 more
semanticscholar   +1 more source

The star formation history of the Sculptor dwarf spheroidal galaxy [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We present the star formation history (SFH) of the Sculptor dwarf spheroidal galaxy based on deep g, r photometry taken with Dark Energy Camera at the Blanco telescope, focusing our analysis on the central region of the galaxy extended up to ∼3 core ...
M. Bettinelli, S. Hidalgo, S. Cassisi, A. Aparicio, G. Piotto, F. Valdes, A. Walker   +6 more
semanticscholar   +1 more source

Rediscovery of the Sixth Star Cluster in the Fornax Dwarf Spheroidal Galaxy [PDF]

Astrophysical Journal, 2019
Since first noticed by Shapley in 1939, a faint object coincident with the Fornax dwarf spheroidal has long been discussed as a possible sixth globular cluster (GC) system.
Mei-Yu Wang, Sergey E. Koposov, A. Drlica-Wagner, A. Pieres, Ting S. Li, T. D. Boer, K. Bechtol, V. Belokurov, A. Pace, T. Abbott, J. Annis, E. Bertin, D. Brooks, E. Buckley-Geer, D. Burke, A. Rosell, M. Kind, J. Carretero, L. Costa, J. Vicente, S. Desai, H. Diehl, P. Doel, J. Estrada, B. Flaugher, P. Fosalba, J. Frieman, J. García-Bellido, D. Gerdes, D. Gruen, R. Gruendl, J. Gschwend, G. Gutiérrez, D. Hollowood, K. Honscheid, B. Hoyle, D. James, S. Kent, K. Kuehn, N. Kuropatkin, M. Maia, J. Marshall, F. Menanteau, R. Miquel, A. Plazas, E. Sánchez, B. Santiago, V. Scarpine, R. Schindler, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, M. Smith, R. C. Smith, F. Sobreira, E. Suchyta, M. Swanson, G. Tarlé, D. Thomas, D. Tucker, A. Walker   +60 more
semanticscholar   +1 more source

The quest for dark matter in dwarf spheroidal galaxies with the Cherenkov Telescope Array [PDF]

EPJ Web of Conferences, 2019
Dwarf spheroidal galaxies are among the best environments that can be studied with Cherenkov telescopes for indirect searches of γ-ray signals coming from dark matter self-interaction (annihilation or decay), due to their proximity and negligible ...
Saturni Francesco G., Rodríguez-Fernández Gonzalo, Morselli Aldo   +2 more
doaj   +1 more source

Mass Modelling of dwarf Spheroidal Galaxies [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractWe study the origin and properties of unbound stars in the kinematic samples of dwarf spheroidal galaxies. For this purpose we have run a high resolution N-body simulation of a two-component dwarf galaxy orbiting in a Milky Way potential. We create mock kinematic data sets by observing the dwarf in different directions.
Klimentowski, J, Łokas, E L, Kazantzidis, S, Prada, F, Mayer, L, Mamon, G A   +5 more
openaire   +3 more sources

The star formation history of the Sextans dwarf spheroidal galaxy: a true fossil of the pre-reionization era [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We present the star formation history (SFH) of the Sextans dwarf spheroidal galaxy based on deep archive $B$,$I$ photometry taken with Suprime-Cam at Subaru telescope focusing our analysis on the inner region of the galaxy, fully located within the core ...
Marco Bettinelli, S. Hidalgo, S. Cassisi, A. Aparicio, G. Piotto   +4 more
semanticscholar   +1 more source

Dwarf Spheroidal Galaxies in the Virgo Cluster [PDF]

The Astrophysical Journal, 1998
We present a study of the smallest and faintest galaxies found in a very deep photographic R band survey of regions of the Virgo Cluster, totalling over 3 square degrees, made with the UK Schmidt Telescope. The objects we detect have the same physical sizes and surface brightnesses as Local Group dwarf spheroidal galaxies.
Jones, JB, Phillipps, S, Schwartzenberg, JM, Parker, QA   +3 more
openaire   +6 more sources

Stellar chemo-kinematics of the Cetus dwarf spheroidal galaxy [PDF]

Astronomy & Astrophysics, 2018
Context. The great majority of early-type dwarf galaxies, in the Local Group as well as in other galaxy groups, are found in the vicinity of much larger galaxies, making it hard to disentangle the role of internal versus external effects in driving their
S. Taibi, G. Battaglia, N. Kacharov, M. Rejkuba, M. Irwin, R. Leaman, M. Zoccali, E. Tolstoy, P. Jablonka   +8 more
semanticscholar   +1 more source

Gravitational tides and dwarf spheroidal galaxies [PDF]

Astronomy & Astrophysics, 2014
The effect of the local environment on the evolution of dwarf spheroidal galaxies is poorly understood. We have undertaken a suite of simulations to investigate the tidal impact of the Milky Way on the chemodynamical evolution of dwarf spheroidals that resemble present day classical dwarfs using the SPH code GEAR.
Pascale Jablonka, Pascale Jablonka, Matthew Nichols, Yves Revaz   +3 more
openaire   +5 more sources