Results 81 to 90 of about 556,485 (362)

Lyman-alpha forests cool warm dark matter [PDF]

Journal of Cosmology and Astroparticle Physics, 2016
The free-streaming of keV-scale particles impacts structure growth on scales that are probed by the Lyman-alpha forest of distant quasars. Using an unprecedentedly large sample of medium-resolution QSO spectra from the ninth data release of SDSS, along with a state-of-the-art set of hydrodynamical simulations to model the Lyman-alpha forest in the non ...
Baur, J., Palanque Delabrouille, N., Yeche, C., Magneville, C., Viel, Matteo   +4 more
openaire   +3 more sources

DETERMINATION OF DARK MATTER TYPE BY X-RAY SOURCES STATISTICS

Odessa Astronomical Publications, 2014
The current cosmological model includes cold dark matter, which consists of massive nonrelativistic particles. There are also some observational and theoretical evidences for warm dark matter.
A.V. Tugay
doaj   +1 more source

XENON1T anomaly and its implication for decaying warm dark matter

Physics Letters B, 2020
An excess in the electronic recoil data was observed in the XENON1T detector. One of plausible explanations for the excess is absorption of a vector bosonic particle with the mass of 2−3keV.
Gongjun Choi, Motoo Suzuki, Tsutomu T. Yanagida   +2 more
doaj   +1 more source

Cosmological implications of a Dark Matter self-interaction energy density

, 2010
We investigate cosmological constraints on an energy density contribution of elastic dark matter self-interactions characterized by the mass of the exchange particle and coupling constant.
C. Boehm, Jürgen Schaffner-Bielich, Rainer Stiele, Tillmann Boeckel   +3 more
core   +1 more source

Dark Matter Caustics [PDF]

, 2008
Caustics are a generic feature of the nonlinear growth of structure in the dark matter distribution. If the dark matter were absolutely cold, its mass density would diverge at caustics, and the integrated annihilation probability would also diverge for ...
Alard, Arnold, Bertschinger, Binney, Cowsik, Fillmore, Helmi, Hogan, Lyubimov, Mark Vogelsberger, Mohayaee, Pagels, Peebles, Peebles, Simon D. M. White, Springel, Szalay, Taylor, Tremaine, Vogelsberger, White, Zel'dovich, Zeldovich, Zeldovich   +23 more
core   +1 more source

NONLINEAR EVOLUTION OF DARK MATTER SUBHALOS AND APPLICATIONS TO WARM DARK MATTER [PDF]

The Astrophysical Journal, 2014
We describe the methodology to include nonlinear evolution, including tidal effects, in the computation of subhalo distribution properties in both cold (CDM) and warm (WDM) dark matter universes. Using semi-analytic modeling, we include effects from dynamical friction, tidal stripping, and tidal heating, allowing us to dynamically evolve the subhalo ...
Pullen, Anthony R., Benson, Andrew J., Moustakas, Leonidas A.   +2 more
openaire   +2 more sources

Imprints of Non-thermal Wino Dark Matter on Small-Scale Structure

, 2012
We study how "warm" the wino dark matter is when it is non-thermally produced by the decays of the gravitino in the early Universe. We clarify the energy distribution of the wino at the decay of the gravitino and the energy loss process after their ...
Ibe, Masahiro, Kamada, Ayuki, Matsumoto, Shigeki   +2 more
core   +1 more source

Halo Cores and Phase Space Densities: Observational Constraints on Dark Matter Physics and Structure Formation [PDF]

, 2000
We explore observed dynamical trends in a wide range of dark matter dominated systems (about seven orders of magnitude in mass) to constrain hypothetical dark matter candidates and scenarios of structure formation.
Allen S. W., Caon N., Craig J. Hogan, Graham A., Irwin M., Julianne J. Dalcanton, Klenya J., Lake G., Marquez I., Pierre M.   +9 more
core   +3 more sources

Cores in warm dark matter haloes: a Catch 22 problem

, 2012
The free streaming of warm dark matter particles dampens the fluctuation spectrum, flattens the mass function of haloes and imprints a fine grained phase density limit for dark matter structures.
Abazajian, Abazajian, Amorisco, Andrea V. Macciò, Aurel Schneider, Ben Moore, Bertschinger, Bode, Bond, Boyarsky, Boyarsky, Boyarsky, Boyarsky, Buchmüller, Colín, Colín, Dalcanton, de Blok, Diemand, Dodelson, Donnino Anderhalden, Dubinski, Flores, Gardini, Governato, Götz, Hansen, Hogan, Jardel, Khlopov, Khlopov, Klypin, Knebe, Knebe, Komatsu, Kuzio, Kuzio de Naray, Macciò, Macciò, Macciò, Macciò, Miranda, Moore, Moore, Oh, Pagels, Peebles, Penarrubia, Polisensky, Romano-Díaz, Salucci, Schmidt, Seljak, Shi, Sinziana Paduroiu, Smith, Springel, Stadel, Strigari, Takayama, Taylor, Tegmark, Tikhonov, Tremaine, Viel, Viel, Villaescusa-Navarro, Waler, Wang, Zavala, Zentner   +70 more
core   +1 more source

Scattering, Damping, and Acoustic Oscillations: Simulating the Structure of Dark Matter Halos with Relativistic Force Carriers [PDF]

, 2014
We demonstrate that self-interacting dark matter models with interactions mediated by light particles can have significant deviations in the matter power-spectrum and detailed structure of galactic halos when compared to a standard cold dark matter ...
Buckley, Matthew R., Cyr-Racine, Francis-Yan, Sigurdson, Kris, Vogelsberger, Mark, Zavala, Jesús   +4 more
core   +3 more sources