Results 51 to 60 of about 23,012 (280)

Structural analysis of the Sextans dwarf spheroidal galaxy [PDF]

, 2016
We present wide-field $g$ and $i$ band stellar photometry of the Sextans dwarf spheroidal galaxy and its surrounding area out to four times its half-light radius ($r_h=695\,$pc), based on images obtained with the Dark Energy Camera at the 4-m Blanco ...
T. A. Roderick, H. Jerjen, G. Costa, A. Mackey   +3 more
semanticscholar   +1 more source

Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS

The Astrophysical Journal, 2023
Dark matter is a key piece of the current cosmological scenario, with weakly interacting massive particles (WIMPs) a leading dark matter candidate. WIMPs have not been detected in their conventional parameter space (100 GeV ≲ M _χ ≲ 100 TeV), a mass ...
A. Acharyya, A. Archer, P. Bangale, J. T. Bartkoske, P. Batista, M. Baumgart, W. Benbow, J. H. Buckley, A. Falcone, Q. Feng, J. P. Finley, G. M. Foote, L. Fortson, A. Furniss, G. Gallagher, W. F. Hanlon, O. Hervet, J. Hoang, J. Holder, T. B. Humensky, W. Jin, P. Kaaret, M. Kertzman, M. Kherlakian, D. Kieda, T. K. Kleiner, N. Korzoun, F. Krennrich, M. J. Lang, M. Lundy, G. Maier, C. E McGrath, P. Moriarty, S. O’Brien, R. A. Ong, K. Pfrang, M. Pohl, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, E. Roache, N. L. Rodd, J. L. Ryan, I. Sadeh, L. Saha, M. Santander, G. H. Sembroski, R. Shang, M. Splettstoesser, D. Tak, J. V. Tucci, V. V. Vassiliev, D. A. Williams   +53 more
doaj   +1 more source

A Multi-epoch Kinematic Study of the Remote Dwarf Spheroidal Galaxy Leo II [PDF]

, 2017
We conducted a large spectroscopic survey of 336 red giants in the direction of the Leo II dwarf galaxy using Hectochelle on the Multiple Mirror Telescope, and we conclude that 175 of them are members based on their radial velocities and surface ...
M. Spencer, M. Mateo, M. Walker, E. Olszewski   +3 more
semanticscholar   +1 more source

Impact of Cosmic‐Ray Physics on Dark Matter Indirect Searches

Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018
The quest for the elusive dark matter (DM) that permeates the Universe (and in general the search for signatures of physics beyond the Standard Model at astronomical scales) provides a unique opportunity and a tough challenge to the high energy astrophysics community.
Daniele Gaggero, Mauro Valli, Farinaldo Queiroz   +2 more
wiley   +1 more source

Enrichment in r-process Elements from Multiple Distinct Events in the Early Draco Dwarf Spheroidal Galaxy [PDF]

, 2017
The stellar record of elemental abundances in satellite galaxies is important to identify the origin of r-process because such a small stellar system could have hosted a single r-process event, which would distinguish member stars that are formed before ...
T. Tsujimoto, T. Matsuno, W. Aoki, M. Ishigaki, T. Shigeyama   +4 more
semanticscholar   +1 more source

About the evolution of Dwarf Spheroidal Galaxies [PDF]

EAS Publications Series, 2007
6 pages, 2 figures, to appear in the Proceedings of the CRAL conference "Chemodynamics: from first stars to local galaxies", Lyon, France, 10-14 July ...
S. Recchi, S. Recchi, A. Marcolini, Fabrizio Brighenti, Annibale D'Ercole   +4 more
openaire   +3 more sources

The Discreet Charm of Higgsino Dark Matter: A Pocket Review

Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018
We give a brief review of the current constraints and prospects for detection of higgsino dark matter in low‐scale supersymmetry. In the first part we argue, after performing a survey of all potential dark matter particles in the MSSM, that the (nearly) pure higgsino is the only candidate emerging virtually unscathed from the wealth of observational ...
Kamila Kowalska, Enrico Maria Sessolo, Yann Mambrini   +2 more
wiley   +1 more source

SEARCH FOR GAMMA-RAY EMISSION FROM DES DWARF SPHEROIDAL GALAXY CANDIDATES WITH FERMI-LAT DATA [PDF]

, 2015
Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM.
A. Drlica-Wagner, A. Albert, K. Bechtol, M. Wood, L. Strigari, M. Sánchez-Conde, L. Baldini, R. Essig, J. Cohen-Tanugi, B. Anderson, R. Bellazzini, E. Bloom, R. Caputo, C. Cecchi, E. Charles, J. Chiang, A. Angelis, S. Funk, P. Fusco, F. Gargano, N. Giglietto, F. Giordano, S. Guiriec, M. Gustafsson, M. Kuss, F. Loparco, P. Lubrano, N. Mirabal, T. Mizuno, A. Morselli, T. Ohsugi, E. Orlando, M. Persic, S. Rainò, N. Sehgal, F. Spada, D. Suson, G. Zaharijas, G. Zaharijas, S. Zimmer, T. Abbott, S. Allam, S. Allam, E. Balbinot, A. Bauer, A. Benoit-Lévy, R. Bernstein, G. Bernstein, E. Bertin, D. Brooks, E. Buckley-Geer, D. Burke, A. Rosell, F. Castander, R. Covarrubias, C. D'Andrea, L. Costa, D. DePoy, S. Desai, H. Diehl, C. Cunha, T. Eifler, T. Eifler, J. Estrada, A. Evrard, A. F. Neto, E. Fernandez, D. Finley, B. Flaugher, J. Frieman, J. Frieman, E. Gaztañaga, D. Gerdes, D. Gruen, R. Gruendl, R. Gruendl, G. Gutiérrez, K. Honscheid, B. Jain, D. James, T. Jeltema, S. Kent, R. Kron, K. Kuehn, K. Kuehn, N. Kuropatkin, O. Lahav, Ting S. Li, E. Luque, M. Maia, M. Makler, M. March, J. Marshall, P. Martini, K. Merritt, C. Miller, R. Miquel, J. Mohr, E. Neilsen, B. Nord, R. Ogando, J. Peoples, D. Petravick, A. Pieres, A. Plazas, A. Plazas, A. Queiroz, A. Romer, A. Roodman, A. Roodman, E. Rykoff, M. Sako, E. Sánchez, B. Santiago, V. Scarpine, M. Schubnell, I. Sevilla, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. Swanson, G. Tarlé, J. Thaler, D. Thomas, D. Tucker, A. Walker, Risa Wechsler, Risa Wechsler, W. Wester, P. Williams, B. Yanny, J. Zuntz   +132 more
semanticscholar   +1 more source

Bose‐Einstein Condensate Dark Matter Halos Confronted with Galactic Rotation Curves

Advances in High Energy Physics, Volume 2017, Issue 1, 2017., 2017
We present a comparative confrontation of both the Bose‐Einstein Condensate (BEC) and the Navarro‐Frenk‐White (NFW) dark halo models with galactic rotation curves. We employ 6 High Surface Brightness (HSB), 6 Low Surface Brightness (LSB), and 7 dwarf galaxies with rotation curves falling into two classes.
M. Dwornik, Z. Keresztes, E. Kun, L. Á. Gergely, Sergei D. Odintsov   +4 more
wiley   +1 more source

Are dSph galaxies Galactic building blocks?

EPJ Web of Conferences, 2012
Dwarf spheroidal galaxies (dSph) are frequently assumed to represent surviving examples of a vast now destroyed population of small systems in which many of the stars now forming the Milky Way were formed. Ongoing accretion and considerable sub-structure
Gilmore G., Asiri H.M.
doaj   +1 more source