Results 31 to 40 of about 28,645 (286)

Dark matter annihilation in the Milky Way halo [PDF]

Journal of Physics: Conference Series, 2008
To constrain the particle properties of dark matter using their annihilation products, robust predictions of the annihilation rates are critical. Since the annihilation rate scales as the dark matter density squared, a precise knowledge of the distribution of dark matter is required. Given the popular galactic center contains large uncertainties in the
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CONSTRAINTS ON THE SHAPE OF THE MILKY WAY DARK MATTER HALO FROM THE SAGITTARIUS STREAM [PDF]

The Astrophysical Journal, 2013
We propose a new model for the dark matter halo of the Milky Way that fits the properties of the stellar stream associated with the Sagittarius dwarf galaxy. Our dark halo is oblate with q_z = 0.9 for r < 10 kpc, and can be made to follow the Law & Majewski model at larger radii.
Vera-Ciro, Carlos, Helmi, Amina
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Endothermic self-interacting dark matter in Milky Way-like dark matter haloes

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT Self-interacting dark matter (SIDM) offers the potential to mitigate some of the discrepancies between simulated cold dark matter (CDM) and observed galactic properties. We introduce a physically motivated SIDM model to understand the effects of self interactions on the properties of Milky Way and dwarf galaxy sized haloes. This
Stephanie O’Neil, Mark Vogelsberger, Saniya Heeba, Katelin Schutz, Jonah C Rose, Paul Torrey, Josh Borrow, Ryan Low, Rakshak Adhikari, Mikhail V Medvedev, Tracy R Slatyer, Jesús Zavala   +11 more
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A Search for the 3.5 keV Line from the Milky Way’s Dark Matter Halo with HaloSat [PDF]

The Astrophysical Journal, 2021
Abstract Previous detections of an X-ray emission line near 3.5 keV in galaxy clusters and other dark-matter-dominated objects have been interpreted as observational evidence for the decay of sterile neutrino dark matter. Motivated by this, we report on a search for a 3.5 keV emission line from the Milky Way’s galactic dark matter halo ...
E. M. Silich, K. Jahoda, L. Angelini, P. Kaaret, A. Zajczyk, D. M. LaRocca, R. Ringuette, J. Richardson   +7 more
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A low pre-infall mass for the Carina dwarf galaxy from disequilibrium modelling [PDF]

, 2015
Dark matter only simulations of galaxy formation predict many more subhalos around a Milky Way like galaxy than the number of observed satellites. Proposed solutions require the satellites to inhabit dark matter halos with masses between one to ten ...
Read, Justin I., Ural, Uğur, Walker, Matthew G., Wilkinson, Mark I.   +3 more
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Constraining Sterile Neutrino Dark Matter in the Milky Way Halo with Swift-XRT

The Astrophysical Journal, 2022
Abstract We present a search for sterile neutrino dark matter decay signals in the Milky Way’s dark matter halo by considering the entirety of the Swift X-ray Telescope (Swift-XRT) data archive. After filtering the raw archive, we analyze a ∼77 Ms data set containing the full field of view, as well as a ∼41 Ms data set with point sources
Dominic Sicilian, Dannell Lopez, Massimo Moscetti, Esra Bulbul, Nico Cappelluti   +4 more
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Searches for annihilating dark matter in the Milky Way halo with IceCube [PDF]

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017), 2017
We present three searches for a neutrino signal from dark matter self-annihilations in the Milky Way. The signal from these events is identified by signatures which start developing within the fiducial volume of the IceCube Neutrino Observatory. The three presented analyses are sensitive to different energy scales and together cover an energy range ...
Samuel Flis, Morten Medici
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A vertically orientated dark matter halo marks a flip of the Galactic disc

Astronomy & Astrophysics
Unveiling the 3D shape of the Milky Way’s dark-matter halo is critical to understanding its formation history. We created an innovative dynamical model that makes minimal assumptions about the internal dynamical structures and accommodates a highly ...
Zhu Ling, Cai Runsheng, Kang Xi, Xue Xiang-Xiang, Yang Chengqun, Zhang Lan, Mao Shude, Liu Chao   +7 more
doaj   +1 more source

Jeans Instability in a Tidally Disrupted Halo Satellite Galaxy [PDF]

, 2010
We use a hybrid test particle/N-body simulation to integrate 4 million massless test particle trajectories within a fully self-consistent 10^5 particle N-body simulation. The number of massless particles allows us to resolve fine structure in the spatial
Alice C. Quillen, Asphaug, Barnes, Bekki, Binney, Bullock, Carlberg, Dehnen, Fridman, Gaburov, Gnedin, Gomez, Harfst, Helmi, Helmi, Helmi, Helmi, Ibata, Ibata, Johnston, Johnston, Johnston, Johnston, Justin Comparetta, Kaib, Kuijken, Kupper, Kupper, Makino, Makino, Masaki, Mayer, Meza, Minchev, Odenkirchen, Penarrubia, Penarrubia, Purcell, Quillen, Shu, Siegal-Gaskins, Villalobos, Wetzstein, Widrow, Widrow, Yanny   +45 more
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Stellar Bars in Isolated Gas-rich Spiral Galaxies Do Not Slow Down

The Astrophysical Journal, 2023
Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expected ...
Angus Beane, Lars Hernquist, Elena D’Onghia, Federico Marinacci, Charlie Conroy, Jia Qi, Laura V. Sales, Paul Torrey, Mark Vogelsberger   +8 more
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