Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Widrow, L."'
We present a new version of the GalactICS code that can generate self-consistent equilibrium galaxy models with a two-component stellar disc and a gas disc as well as a centrally-concentrated bulge and extended dark halo. The models can serve as init
Externí odkaz:
http://arxiv.org/abs/1904.12700
Publikováno v:
A&A 618, A106 (2018)
We present a two-step method to simulate and study non-circular motions in strongly barred galaxies. The first step is to constrain the initial parameters using a Bayesian analysis of each galaxy's azimuthally averaged rotation curve, the 3.6 $\rm \m
Externí odkaz:
http://arxiv.org/abs/1807.05542
Autor:
Courteau, S., Cappellari, M., de Jong, R. S., Dutton, A. A., Emsellem, E., Hoekstra, H., Koopmans, L. V. E., Mamon, G. A., Maraston, Claudia, Treu, T., Widrow, L. M.
Publikováno v:
Rev Mod Phys 86 (2014), 47-119
Galaxy masses play a fundamental role in our understanding of structure formation models. This review addresses the variety and reliability of mass estimators that pertain to stars, gas, and dark matter. The different sections on masses from stellar
Externí odkaz:
http://arxiv.org/abs/1309.3276
Autor:
Chapman, S. C., Widrow, L., Collins, M. L. M., Dubinski, J., Ibata, R. A., Penarrubia, J., Rich, M., Ferguson, A. M. N., Irwin, M. J., Lewis, G. F., Martin, N., McConnachie, A., Tanvir, N.
We present results from a spectroscopic survey of the dwarf spheroidal And XXII and the two extended clusters EC1 and EC2. These three objects are candidate satellites of the Triangulum galaxy, M33, which itself is likely a satellite of M31. We use t
Externí odkaz:
http://arxiv.org/abs/1206.5730
Publikováno v:
Phys.Rev.D80:123513,2009
Recently, ATIC and PAMELA measured an anomalously large flux of leptonic cosmic rays which may arise from dark matter self-annihilation. While the annihilation signal predicted for a smooth halo is 10^2-10^3 times smaller than the measured excess, th
Externí odkaz:
http://arxiv.org/abs/0906.4352
We explore the dependence of the subhalo mass function on the spectral index n of the linear matter power spectrum using scale-free Einstein-de Sitter simulations with n=-1 and n=-2.5. We carefully consider finite volume effects that may call into qu
Externí odkaz:
http://arxiv.org/abs/0811.0206
Publikováno v:
Phys.Rev. D64 (2001) 083516
In the cold dark matter model of structure formation, galaxies are assembled hierarchically from mergers and the accretion of subclumps. This process is expected to leave residual substructure in the Galactic dark halo, including partially disrupted
Externí odkaz:
http://arxiv.org/abs/astro-ph/0106048
Autor:
Crotts, A., Uglesich, R., Gould, A., Gyuk, G., Sackett, P., Kuijken, K., Sutherland, W., Widrow, L.
January 2000 completes the first season of intensive, wide-field observations of microlensing and stellar variability in M31 by MEGA (Microlensing Exploration of the Galaxy and Andromeda) at the Isaac Newton 2.5m Telescope, the KPNO 4m, and the 1.3m
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006282
Publikováno v:
Phys.Rev. D52 (1995) 5480-5485
We investigate a new hybrid-model universe containing two types of dark matter, one ``warm'' and the other ``hot''. The hot component is an ordinary light neutrino with mass $\sim 25h^2$~eV while the warm component is a sterile neutrino with mass $\s
Externí odkaz:
http://arxiv.org/abs/astro-ph/9504014
Publikováno v:
Phys.Lett.B282:132-136,1992
We examine the sensitivity of several solutions of the strong-CP problem to violations of global symmetries by Planck scale physics. We find that the Peccei-Quinn solution is extremely sensitive to U(1)_PQ violating operators of dimension less than 1
Externí odkaz:
http://arxiv.org/abs/hep-ph/9203206