Rapetti, David, Allen, Steven W., Mantz, Adam, Ebeling, Harald
This is the third of a series of papers in which we derive simultaneous constraints on cosmological parameters and X-ray scaling relations using observations of the growth of massive, X-ray...
The Observed Growth of Massive Galaxy Clusters IV: Robust Constraints on Neutrino Properties (2009)
Mantz, Adam, Allen, Steven W., Rapetti, David
This is the fourth of a series of papers in which we derive simultaneous constraints on cosmological parameters and X-ray scaling relations using observations of the growth of massive, X-ray...
Mantz, Adam, Allen, Steven W., Rapetti, David, Ebeling, Harald
(Abridged) This is the first of a series of papers in which we derive simultaneous constraints on cosmological parameters and X-ray scaling relations using observations of the growth of massive,...
The Observed Growth of Massive Galaxy Clusters II: X-ray Scaling Relations (2009)
Mantz, Adam, Allen, Steven W., Ebeling, Harald, Rapetti, David, Drlica-Wagner, Alex
(Abridged) This is the second in a series of papers in which we derive simultaneous constraints on cosmology and X-ray scaling relations using observations of massive, X-ray flux-selected galaxy...
Rapetti, David, Allen, Steven W., Mantz, Adam, Ebeling, Harald
We use measurements of the growth of cosmic structure, as inferred from the observed evolution of the X-ray luminosity function (XLF) of galaxy clusters, to constrain departures from General...
Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222 (2008)
Bradač, Maruša, Allen, Steven W., Treu, Tommaso, Ebeling, Harald, Massey, Richard, Morris, R. Glenn, ...
We constrain the physical nature of dark matter using the newly identified massive merging galaxy cluster MACSJ0025.4-1222. As was previously shown by the example of the Bullet Cluster (1E0657-56),...
Rapetti, David, Allen, Steven W., Mantz, Adam
We examine the ability of a future X-ray observatory to constrain dark energy via measurements of the cluster X-ray gas mass fraction, fgas. We find that fgas measurements for a sample of ~500 hot,...
Probing Dark Energy with Constellation-X (2006)
Rapetti, David, Allen, Steven W.
Constellation-X (Con-X) will carry out two powerful and independent sets of tests of dark energy based on X-ray observations of galaxy clusters, providing comparable accuracy to other leading dark...
A kinematical approach to dark energy studies (2006)
Rapetti, David, Allen, Steven W., Amin, Mustafa A., Blandford, Roger D.
We present and employ a new kinematical approach to cosmological `dark energy' studies. We construct models in terms of the dimensionless second and third derivatives of the scale factor a(t) with...
Rapetti, David, Allen, Steven W., Weller, Jochen
We present new constraints on the evolution of dark energy from an analysis of Cosmic Microwave Background, supernova and X-ray galaxy cluster data. Our analysis employs a minimum of priors and...
A unique small-scale gravitational arc in Abell 1201 (2003)
Edge, Alastair C., Smith, Graham P., Sand, David J., Treu, Tommaso, Ebeling, Harald, Allen, Steven W., ...
We present a snapshot Hubble Space Telescope (HST) image of the galaxy cluster A1201 (z=0.169), revealing a tangential arc 2arcsec from the brightest cluster galaxy (BCG). Keck-ESI spectroscopy...
Low-luminosity black holes: The case of M87 (2003)
Di Matteo, Tiziana, Allen, Steven W., Fabian, Andrew C., Wilson, Andrew S., Young, Andrew J.
Accretion onto the Supermassive Black Hole in M87 (2002)
Di Matteo, Tiziana, Allen, Steven W., Fabian, Andrew C., Wilson, Andrew S., Young, Andrew J.
Chandra X-ray observations of the giant elliptical galaxy M87 resolve the thermal state of the hot interstellar medium into the accretion (Bondi) radius of its central 3 10^9 Msun black hole. We...
Hard X-ray emission from elliptical galaxies and its contribution to the X-ray background (1999)
Di Matteo, Tiziana, Allen, Steven W.
We explore the implications of the discovery of hard, power-law X-ray sources in the spectra of nearby elliptical galaxies for the origin of the X-ray background. The spectra of these sources are...
Suffering in Dostoevsky :--the dialogue of form and content /--by Steven W. Allen. (1990)
Thesis (B.A.)--Williams College, Dept. of Russian, 1990.
Graduate recital./--by Steven W. Allen. (1969)
Plan B report (M.M.)--Utah State University. Dept. of Music.