Results 101 to 110 of about 8,643,173 (282)

Cluster number counts dependence on dark energy inhomogeneities and coupling to dark matter

, 2006
Cluster number counts can be used to test dark energy models. We investigate dark energy candidates which are coupled to dark matter. We analyze the cluster number counts dependence on the amount of dark matter coupled to dark energy.
Amendola, Amendola, Amendola, Annis, Arbey, Bagla, Bahcall, Barreiro, Barrow, Bertolami, Bond, Brax, Brax, Brookfield, Carroll, Carroll, Causse, Clifton, Copeland, D. F. Mota, Damour, Damour, Doran, Dvali, Ellis, Farrar, Ferreira, Freese, Governato, Gross, Haiman, Holden, Horellou, Jassal, Jenkins, Khoury, Khoury, Lacey, Le Delliou, Lima, Lima, Lopes, M. Manera, Ma, Mainini, Maor, Mota, Mota, Mota, Multamaki, Nunes, Padmanabhan, Padmanabhan, Padmanabhan, Perlmutter, Press, Ratra, Ratra, Riess, Riess, Ruhl, Sarkar, Schuecker, Sheth, Solevi, Spergel, Springel, Steinhardt, Steinhardt, Sugiyama, Tocchini-Valentini, Viana, Wang, Wang, Wetterich, Wetterich, Wetterich, Zehavi, Zlatev   +78 more
core   +3 more sources

Coupling q-Deformed Dark Energy to Dark Matter

Advances in High Energy Physics, 2016
We propose a novel coupled dark energy model which is assumed to occur as a q-deformed scalar field and investigate whether it will provide an expanding universe phase. We consider the q-deformed dark energy as coupled to dark matter inhomogeneities.
Emre Dil
doaj   +1 more source

Archimedean-type force in a cosmic dark fluid: III. Big Rip, Little Rip and Cyclic solutions

, 2012
We analyze late-time evolution of the Universe in the framework of the self-consistent model, in which the dark matter is influenced by the Archimedean-type force proportional to the four-gradient of the dark energy pressure.
Balakin, Alexander B., Bochkarev, Vladimir V.   +1 more
core   +1 more source

Dark energy and dark matter haloes [PDF]

Monthly Notices of the Royal Astronomical Society, 2005
16 p., 11 fig.; replaced with revised version, accepted for publication in MNRAS; corrected error (w=-1.5 halo mass function now agrees with Jenkins et al.
Andrew R. Zentner, James S. Bullock, Joel R. Primack, Michael Kuhlen, Louis E. Strigari   +4 more
openaire   +3 more sources

Dark Matter and Dark Energy in the Universe

Bibechana, 2014
Cosmological and astronomical observations predict that the present Universe is passing through an accelerating phase of expansion. The Universe emerged out of an exponential phase in the very early Universe.
BC Paul
doaj   +3 more sources

Stellar Streams Discovered in the Dark Energy Survey [PDF]

Astrophysical Journal, 2018
We perform a search for stellar streams around the Milky Way using the first 3 yr of multiband optical imaging data from the Dark Energy Survey (DES).
N. Shipp, A. Drlica-Wagner, E. Balbinot, P. Ferguson, D. Erkal, D. Erkal, Ting S. Li, K. Bechtol, V. Belokurov, B. Buncher, D. Carollo, M. Kind, M. Kind, K. Kuehn, J. Marshall, A. Pace, E. Rykoff, E. Rykoff, I. Sevilla-Noarbe, E. Sheldon, L. Strigari, A. K. Vivas, B. Yanny, A. Zenteno, T. Abbott, F. Abdalla, F. Abdalla, S. Allam, S. Ávila, S. Ávila, E. Bertin, D. Brooks, D. Burke, D. Burke, J. Carretero, F. Castander, R. Cawthon, M. Crocce, C. Cunha, C. D'Andrea, L. Costa, C. Davis, J. Vicente, S. Desai, H. Diehl, P. Doel, A. Evrard, B. Flaugher, P. Fosalba, J. Frieman, J. Frieman, J. García-Bellido, E. Gaztañaga, D. Gerdes, D. Gruen, D. Gruen, R. Gruendl, R. Gruendl, J. Gschwend, G. Gutiérrez, W. Hartley, W. Hartley, K. Honscheid, B. Hoyle, B. Hoyle, D. James, M. Johnson, E. Krause, E. Krause, N. Kuropatkin, O. Lahav, Huan Lin, M. Maia, M. March, P. Martini, F. Menanteau, F. Menanteau, C. Miller, R. Miquel, R. Nichol, A. Plazas, A. Romer, M. Sako, E. Sánchez, B. Santiago, V. Scarpine, R. Schindler, M. Schubnell, M. Smith, Robert C. Smith, F. Sobreira, E. Suchyta, M. Swanson, G. Tarlé, D. Thomas, D. Tucker, A. Walker, Risa Wechsler, Risa Wechsler   +98 more
semanticscholar   +1 more source

Unification of Dark Energy and Dark Matter

, 2005
We propose a scenario in which dark energy and dark matter are described in a unified manner. The ultralight pseudo-Nambu-Goldstone (pNG) boson, A, naturally explains the observed magnitude of dark energy, while the bosonic supersymmetry partner of the ...
Amendola, Arbey, Asaka, Asaka, Beacom, Bento, Bi, Bilic, Boehm, Caldwell, Ferrer, Frampton, Fuminobu Takahashi, Gunion, Hashiba, Hooper, Hooper, Ibe, Ibe, Ichikawa, Jean, Jean, Jeong, Kamenshchik, Kasuya, Kasuya, Kawasaki, Kawasaki, Kawasaki, Kawasaki, Kim, Knodlseder, Knodlseder, Lyth, Mainini, Navarro, Nomura, Oaknin, Padmanabhan, Perlmutter, Picciotto, Ratra, Riess, Serpico, Stewart, T.T. Yanagida, Weinberg, Wetterich   +47 more
core   +3 more sources

ELECTROMAGNETIC DARK ENERGY [PDF]

International Journal of Modern Physics D, 2008
We introduce a new model for dark energy in the Universe in which a small cosmological constant is generated by ordinary electromagnetic vacuum energy. The corresponding virtual photons exist at all frequencies but switch from a gravitationally active phase at low frequencies to a gravitationally inactive phase at higher frequencies via a Ginzburg ...
Christian Beck, Michael C. Mackey
openaire   +4 more sources

Astrometric Redshifts of Supernovae

The Astrophysical Journal
Differential Chromatic Refraction (DCR) is caused by the wavelength dependence of our atmosphere’s refractive index, which shifts the apparent positions of stars and galaxies and distorts their shapes depending on their spectral energy distributions ...
Jaemyoung (Jason) Lee, Masao Sako, Richard Kessler, Alex I. Malz, The LSST Dark Energy Science Collaboration   +4 more
doaj   +1 more source

Testing the Cosmic Coincidence Problem and the Nature of Dark Energy

, 2001
Dark energy models which alter the relative scaling behavior of dark energy and matter could provide a natural solution to the cosmic coincidence problem - why the densities of dark energy and dark matter are comparable today. A generalized class of dark
A. E. Lange, A. G. Riess, Aneesh V. Manohar, C. Alcock, C. S. Kochanek, C. Wetterich, D. P. Schneider, Elizabeth Jenkins, I. Zlatev, J. A. Frieman, J. A. Newman, J. Peacock, Kevork Abazajian, L. Hui, N. A. Bahcall, Neal Dalal, P. de Bernardis, P. G. Ferreira, P. J. E. Peebles, P. J. E. Peebles, P. McDonald, R. R. Caldwell, S. Perlmutter, S. Perlmutter, S. Weinberg, V. R. Eke, X. Fan   +26 more
core   +1 more source