Results 21 to 30 of about 173,637 (267)

A galaxy lacking dark matter [PDF]

Nature, 2018
Studies of galaxy surveys in the context of the cold dark matter paradigm have shown that the mass of the dark matter halo and the total stellar mass are coupled through a function that varies smoothly with mass. Their average ratio M_{halo}/M_{stars} has a minimum of about 30 for galaxies with stellar masses near that of the Milky Way (approximately ...
van Dokkum, Pieter, Danieli, Shany, Cohen, Yotam, Merritt, Allison, Romanowsky, Aaron J., Abraham, Roberto, Brodie, Jean, Conroy, Charlie, Lokhorst, Deborah, Mowla, Lamiya, O’Sullivan, Ewan, Zhang, Jielai   +11 more
openaire   +5 more sources

Discovery of an Isolated Dark Dwarf Galaxy in the Nearby Universe

The Astrophysical Journal Letters, 2023
Based on a new H i survey using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), combined with the Pan-STARRS1 images, we identified an isolated H i cloud without any optical counterpart, named FAST J0139+4328.
Jin-Long Xu, Ming Zhu, Naiping Yu, Chuan-Peng Zhang, Xiao-Lan Liu, Mei Ai, Peng Jiang   +6 more
doaj   +1 more source

Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles

The Astrophysical Journal, 2023
Galaxies show different halo scaling relations such as the radial acceleration relation, the mass discrepancy acceleration relation (MDAR), or the dark matter (DM) surface density relation.
A. Krut, C. R. Argüelles, P.-H. Chavanis, J. A. Rueda, R. Ruffini   +4 more
doaj   +1 more source

Dark Energy Survey year 1 results: Galaxy-galaxy lensing [PDF]

Physical Review D, 2018
26 pages, 19 figures.
Prat, J., Sánchez, C., Fang, Y., Gruen, D., Elvin-Poole, J., Kokron, N., Secco, L.F., Jain, B., Miquel, R., Maccrann, N., Troxel, M.A., Alarcon, A., Bacon, D., Bernstein, G.M., Blazek, J., Cawthon, R., Chang, C., Crocce, M., Davis, C., de Vicente, J., Dietrich, J.P., Drlica-Wagner, A., Friedrich, O., Gatti, M., Hartley, W.G., Hoyle, B., Huff, E.M., Jarvis, M., Rau, M.M., Rollins, R.P., Ross, A.J., Rozo, E., Rykoff, E.S., Samuroff, S., Sheldon, E., Varga, T.N., Vielzeuf, P., Zuntz, J., Abbott, T.M.C., Abdalla, F.B., Allam, S., Annis, J., Bechtol, K., Benoit-Lévy, A., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D.L., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Castander, F.J., Cunha, C.E., d'Andrea, C.B., da Costa, L.N., Desai, S., Diehl, H.T., Dodelson, S., Eifler, T.F., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D.W., Giannantonio, T., Goldstein, D.A., Gruendl, R.A., Gschwend, J., Gutierrez, G., Honscheid, K., James, D.J., Jeltema, T., Johnson, M.W.G., Johnson, M.D., Kirk, D., Krause, E., Kuehn, K., Kuhlmann, S., Lahav, O., Li, T.S., Lima, M., Maia, M.A.G., March, M., Marshall, J.L., Martini, P., Melchior, P., Menanteau, F., Mohr, J.J., Nichol, R.C., Nord, B., Plazas, A.A., Romer, A.K., Roodman, A., Sako, M., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Sevilla-Noarbe, I., Smith, M., Smith, R.C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M.E.C., Tarle, G., Thomas, D., Tucker, D.L., Vikram, V., Walker, A.R., Wechsler, R.H., Yanny, B., Zhang, Y.   +114 more
openaire   +9 more sources

Dark matter phenomenology of high-speed galaxy cluster collisions

European Physical Journal C: Particles and Fields, 2017
We perform a general computational analysis of possible post-collision mass distributions in high-speed galaxy cluster collisions in the presence of self-interacting dark matter.
Yuriy Mishchenko, Chueng-Ryong Ji
doaj   +1 more source

Dynamical Models of Spherical Galaxies with Massive Halo [PDF]

Journal of Astronomy and Space Sciences, 2003
Using the Schwarzschild's linear programming technique, we obtained the general solutions of the collisionless Bolzmann equation describing the spherical galaxy in dynamical equilibrium.
Mun-Suk Chun, Hun-Sung Ko, Young-Jong Sohn   +2 more
doaj   +1 more source

Analytic model for galaxy and dark matter clustering [PDF]

, 2000
We investigate an analytic model to compute nonlinear power spectrum of dark matter, galaxies and their cross-correlation. The model is based on Press-Schechter halos, which cluster and have realistic dark matter profiles.
Spergel, U. Seljak
core   +2 more sources

Galaxies with fuzzy dark matter

Journal of the Korean Physical Society, 2021
This is a brief review on some properties of galaxies in the fuzzy dark matter model, where dark matter is an ultra-light scalar particle with mass $m = O(10^{-22})eV$. From quantum pressure, dark matter has a halo length scale which can solve the small scale issues of the cold dark matter model, such as the core-cusp problem, and explain many other ...
openaire   +2 more sources

Physical properties of dark matter in galaxy U11454

Physical Sciences and Technology, 2020
In this paper physical characteristics of dark matter distribution in the spiral galaxy U11454 is explored using only well-known cored density profiles in the literature such as the pseudo-isothermal, Burkert, Einasto, exponential sphere, Beta and ...
K. Boshkayev, T. K. Konysbayev, E. B. Kurmanov, M. Muccino, G. Zhumakhanova   +4 more
doaj   +3 more sources

Can a galaxy redshift survey measure dark energy clustering? [PDF]

, 2006
(abridged) A wide-field galaxy redshift survey allows one to probe galaxy clustering at largest spatial scales, which carries an invaluable information on horizon-scale physics complementarily to the cosmic microwave background (CMB).
C. Alcock, D. J. Heath, G. J. Hill, J. A. Peacock, M. Kimura, Masahiro Takada, N. Kaiser, P. J. E. Peebles, S. Dodelson, T. Chiba   +9 more
core   +2 more sources