Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Alex Geringer-Sameth"'
Autor:
Kyler Kuehn, Nick Evans, Daniel B. Zucker, Jason L. Sanders, Vasily Belokurov, Sergey E. Koposov, G. Torrealba, W. Dehnen, Matthew G. Walker, Alex Geringer-Sameth, Tenglin Li
Publikováno v:
Torrealba, G, Belokurov, V, Koposov, S E, Li, T S, Walker, M G, Sanders, J L, Geringer-Sameth, A, Zucker, D B, Kuehn, K, Evans, N W & Dehnen, W 2019, ' The hidden giant : discovery of an enormous Galactic dwarf satellite in Gaia DR2 ', Monthly Notices of the Royal Astronomical Society, vol. 488, no. 2, pp. 2743-2766 . https://doi.org/10.1093/mnras/stz1624
We report the discovery of a Milky Way satellite in the constellation of Antlia. The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of $b\sim 11^{\circ}$ and spans $1.26$ degrees, which corresponds to $\sim2.9$ kpc at its dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6d4f1f977c4c5beb83e323cccd09911
https://doi.org/10.1093/mnras/stz1624
https://doi.org/10.1093/mnras/stz1624
Autor:
Alex Geringer-Sameth, Nagisa Hiroshima, Roberto Trotta, Matthew G. Walker, Sebastian Hoof, Shin'ichiro Ando
Publikováno v:
Physical Review D, 102(6):061302. American Institute of Physics
Dwarf spheroidal galaxies that form in halo substructures provide stringent constraints on dark matter annihilation. Many ultrafaint dwarfs discovered with modern surveys contribute significantly to these constraints. At present, because of the lack
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7bcd0847dcdbac57fc758ad780b7a09
https://dare.uva.nl/personal/pure/en/publications/structure-formation-models-weaken-limits-on-wimp-dark-matter-from-dwarf-spheroidal-galaxies(126694a2-3300-427d-887a-87ee0759e533).html
https://dare.uva.nl/personal/pure/en/publications/structure-formation-models-weaken-limits-on-wimp-dark-matter-from-dwarf-spheroidal-galaxies(126694a2-3300-427d-887a-87ee0759e533).html
Publikováno v:
Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
We present a new estimate of the mass of the Milky Way, inferred via a Bayesian approach by making use of tracers of the circular velocity in the disk plane and stars in the stellar halo, as from the publicly available {\tt galkin} compilation. We us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c97411a19ceb8b1b2b72072fe54d5418
http://hdl.handle.net/11588/836910
http://hdl.handle.net/11588/836910
J-factors (or D-factors) describe the distribution of dark matter in an astrophysical system and determine the strength of the signal provided by annihilating (or decaying) dark matter respectively. We provide simple analytic formulae to calculate th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eccff336eb65cfeb200d30ce10d692ff
Publikováno v:
Journal of Cosmology and Astroparticle Physics
Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
We develop a novel Bayesian methodology aimed at reliably and precisely inferring the distribution of dark matter within the Milky Way using rotation curve data. We identify a subset of the available rotation curve tracers that are mutually consisten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ba99881185b9c33cdf989d3488bcea0
Autor:
Alma X. Gonzalez-Morales, Stefano Profumo, Alex Geringer-Sameth, Oleg Burgueño, Javier Reynoso-Cordova, Octavio Valenzuela
Publikováno v:
Journal of Cosmology and Astroparticle Physics, vol 2021, iss 02
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, vol 2021, iss 2
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, vol 2021, iss 2
We explore two possible scenarios to explain the observed gamma-ray emission associated with the atypical globular cluster Omega-Centauri: emission from millisecond pulsars (MSP) and dark matter (DM) annihilation. In the first case the total number o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69d5b52149c9f962b742b9c034248bef
https://doi.org/10.1088/1475-7516/2021/02/010
https://doi.org/10.1088/1475-7516/2021/02/010
Autor:
Edward W. Olszewski, Evan Tucker, Matthew G. Walker, Mario Mateo, Christopher J. Miller, Alex Geringer-Sameth
We develop and implement a model to analyze the internal kinematics of galaxy clusters that may contain subpopulations of galaxies that do not independently trace the cluster potential. The model allows for substructures within the cluster environmen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fc313c0a8b38ebcc1fdbf426c39391c
Autor:
Vasily Belokurov, Matthew G. Walker, P. Jethwa, Alex Geringer-Sameth, Edward W. Olszewski, Sergey E. Koposov, Denis Erkal, Dougal Mackey, Andrew R. Casey, John I. Bailey, Mario Mateo, Gary S. Da Costa
Publikováno v:
Koposov, S E, Walker, M G, Belokurov, V, Casey, A R, Geringer-Sameth, A, Mackey, D, Costa, G D, Erkal, D, Jethwa, P, Mateo, M, Olszewski, E W & John, I B III 2018, ' Snake in the Clouds: a new nearby dwarf galaxy in the Magellanic bridge ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/sty1772
Monthly Notices of the Royal Astronomical Society, 479(4), 5343-5361
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 479(4), 5343-5361
Monthly Notices of the Royal Astronomical Society
We report the discovery of a nearby dwarf galaxy in the constellation of Hydrus, between the Large and the Small Magellanic Clouds. Hydrus 1 is a mildy elliptical ultra-faint system with luminosity $M_V\sim$ -4.7 and size $\sim$ 50 pc, located 28 kpc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::575c37c0c409ff2d7c6dc88eb7596362
https://surrey.eprints-hosting.org/849233/
https://surrey.eprints-hosting.org/849233/
Autor:
Ralph Bird, Q. Feng, Marita Krause, Martin Pohl, M. J. Lang, J. Tyler, Matteo Cerruti, J. H. Buckley, A. N. Otte, Amy Furniss, I. Telezhinsky, E. Roache, Jamie Holder, M. P. Connolly, Wystan Benbow, N. Kelley-Hoskins, P. Kaaret, Olivier Hervet, Alex Geringer-Sameth, Karlen Shahinyan, B. Zitzer, J. Grube, M. Buchovecky, G. H. Sembroski, F. Krennrich, S. McArthur, N. H. Park, David Kieda, C. B. Rulten, P. Kar, Etienne Bourbeau, T. T.Y. Lin, N. Håkansson, Henrike Fleischhack, J. V. Tucci, A. Popkow, C. A. Johnson, M. Kertzman, Sinéad M. Griffin, R. Mukherjee, P. Moriarty, S. P. Wakely, Karen Byrum, R. A. Ong, Lucy Fortson, A. Weinstein, Marcos Santander, B. Hummensky, M. K. Daniel, John L. Quinn, T. Brantseg, E. Pueschel, David A. Williams, Gordon T. Richards, P. T. Reynolds, K. Ragan, Daniel Nieto, Moritz Hütten, A. Archer, D. Staszak, S. Trepanier, Jodi Christiansen, P. Wilcox, I. Sadeh, Wei Cui, Savvas M. Koushiappas, A. W. Smith, J. P. Finley, S. Archambault, D. S. Hanna, V. Bugaev, S. O'Brien, G. Hughes
Publikováno v:
ResearcherID
Physical review / D 95(8), 082001 (2017). doi:10.1103/PhysRevD.95.082001
Physical review / D 95(8), 082001 (2017). doi:10.1103/PhysRevD.95.082001
We present constraints on the annihilation cross section of WIMP dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS. These results are derived from an optimized photon weighting statistical technique that improves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79918d62ce54c4c29eb764302ae4b536
http://arxiv.org/abs/1703.04937
http://arxiv.org/abs/1703.04937
Gamma-ray experiments seeking to detect evidence of dark matter annihilation in dwarf spheroidal galaxies require knowledge of the distribution of dark matter within these systems. We analyze the effects of flattening on the annihilation (J) and deca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56f7cbf0d2acf290efe01bef10f116d0