Synchrotron Emission from Elliptical Galaxies Consequent to AGN outbursts (2009)
Ciotti, L., Ostriker, J. P., Spitkovsky, A.
Both radiative and mechanical feedback from Active Galactic Nuclei have been found to be important for the evolution of elliptical galaxies. We compute how a shock may be driven from a central black...
Pellegrini, S., Ciotti, L., Ostriker, J. P.
The centers of elliptical galaxies host supermassive black holes that significantly affect the surrounding interstellar medium through feedback resulting from the accretion process. The evolution of...
Ciotti, L., Ostriker, J. P., Proga, D.
The importance of the radiative feedback from SMBHs at the centers of elliptical galaxies is not in doubt, given the well established relations among electromagnetic output, black hole mass and...
We present results of an attempt to include more detailed gas physics motivated from hydrodynamical simulations within semi-analytic models (SAM) of galaxy formation, focusing on the role that...
Kang, Hyesung, Ryu, Dongsu, Cen, Renyue, Ostriker, J. P.
Cosmological shock waves result from supersonic flow motions induced by hierarchical clustering of nonlinear structures in the universe. These shocks govern the nature of cosmic plasma through...
The importance of the radiative feedback from massive black holes at the centers of elliptical galaxies is not in doubt, given the well established relations among electromagnetic output, black hole...
We revisit the longstanding question of whether first brightest cluster galaxies are statistically drawn from the same distribution as other cluster galaxies or are "special", using the new...
The Bound Mass of Substructures in Dark Matter Halos (2006)
Shaw, L. D., Weller, J., Ostriker, J. P., Bode, P.
We present a new definition of subhalos in dissipationless dark matter N-body simulations, based on the coherent identification of their dynamically bound constituents. Whereas previous methods of...
The Non-Parametric Model for Linking Galaxy Luminosity with Halo/Subhalo Mass (2005)
We present a non-parametric, empirically based, model for associating galaxy luminosities with halo/subhalo masses, based on a self-consistent treatment of subhalo mass loss and the subhalo mass...
Statistics of Physical Properties of Dark Matter Clusters (2005)
Shaw, L. D., Weller, J., Ostriker, J. P., Bode, P.
We have identified over 2000 well resolved cluster halos, and also their associated bound subhalos, from the output of a 1024^3 particle cosmological N-body simulation (of box size 320 h^-1 Mpc and...
Radiative feedback from quasars and the growth of massive black holes in stellar spheroids (2005)
Sazonov, S. Yu., Ostriker, J. P., Ciotti, L., Sunyaev, R. A.
Tracing the Warm Hot Intergalactic Medium in the local Universe (2004)
Viel, M., Branchini, E., Cen, R., Ostriker, J. P., Matarrese, S., Mazzotta, P., ...
We present a simple method for tracing the spatial distribution and predicting the physical properties of the Warm-Hot Intergalactic Medium (WHIM), from the map of galaxy light in the local universe....
Radiative feedback from quasars and the growth of massive black holes in stellar spheroids (2004)
Sazonov, S. Yu., Ostriker, J. P., Ciotti, L., Sunyaev, R. A.
We discuss the importance of feedback via photoionization and Compton heating on the co-evolution of massive black holes (MBHs) at the center of spheroidal galaxies and their stellar and gaseous...
Radiative Feedback from Quasars and the Growth of Supermassive Black Holes (2004)
Sazonov, S. Yu., Ostriker, J. P., Ciotti, L., Sunyaev, R. A.
We discuss the role of feedback via photoionization and Compton heating in the co-evolution of massive black holes at the center of spheroidal galaxies and their stellar and gaseous components. We...
A physically motivated toy model for the BH-spheroid coevolution (2004)
Ciotti, L., Ostriker, J. P., Sazonov, S. Yu.
We present a summary of the results obtained with a time-dependent, one-zone toy model aimed at exploring the importance of radiative feedback on the co-evolution of massive black holes (MBHs) at the...
McDonald, P., Seljak, U., Cen, R., Bode, P., Ostriker, J. P.
We explore several physical effects on the power spectrum of the Lyman-alpha forest transmitted flux. The effects we investigate here are usually not part of hydrodynamic simulations and so need to...
Active Galaxies and Radiative Heating (2004)
There is abundant evidence that heating processes in the central regions of elliptical galaxies has both prevented large-scale cooling flows and assisted in the expulsion of metal rich gas. We now...
Linking halo mass to galaxy luminosity (2004)
In this paper we present a new, essentially empirical, model for the relation between the mass of a dark matter halo/subhalo and the luminosity of a galaxy hosted in it. To estimate this, we replace...
Anomalous Flux Ratios in Gravitational Lenses: For or Against CDM? (2004)
Mao, S., Jing, Y. P., Ostriker, J. P., Weller, J.
We review the evidence for substructures from the anomalous flux ratios in gravitational lenses. Using high-resolution numerical simulations, we show that at typical image positions, the fraction of...
Free-free absorption effects on Eddington luminosity (2003)
In standard treatments the Eddington luminosity is calculated by assuming that the electron-photon cross section is well described by the Thomson cross section which is gray (frequency independent)....
The role of Compton heating in cluster cooling flows (2003)
Ciotti, L., Ostriker, J. P., Pellegrini, S.
Recent observations by Chandra and XMM-Newton demonstrate that the central gas in "cooling flow" galaxy clusters has a mass cooling rate that decreases rapidly with decreasing temperature. This...
Quasars: the characteristic spectrum and the induced radiative heating (2003)
Sazonov, S. Yu., Ostriker, J. P., Sunyaev, R. A.
Using information on the cosmic X-ray background and the cumulative light of active galactic nuclei at infrared wavelengths, the estimated local mass density of galactic massive black holes (MBHs)...
Detecting X-ray filaments in the low redshift Universe with XEUS and Constellation-X (2002)
Viel, M., Branchini, E., Cen, R., Matarrese, S., Mazzotta, P., Ostriker, J. P.
We propose a possible way to detect baryons at low redshifts from the analysis of X-ray absorption spectra of bright AGN pairs. A simple semi-analytical model to simulate the spectra is presented. We...
Sloan Digital Sky Survey: Early data release (2002)
Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S., Castander, F. J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...
Searching for Baryons with Chandra (2000)
Phillips, L. A., Ostriker, J. P.
At low redshifts, measurements of the total baryon content in stars, atomic and molecular hydrogen, and cluster gas fall a factor of two to four below the baryon density derived from observed...
Is There Still Room for Warm/Hot Gas? Simulating the X-ray Background Spectrum (2000)
Phillips, L. A., Ostriker, J. P., Cen, R.
At low redshifts, a census of the baryons in all known reservoirs falls a factor of two to four below the total baryon density predicted from Big Bang nucleosynthesis arguments and observed light...
The Mass-To-Light Function: Antibias and Omega_m (2000)
Bahcall, N. A., Cen, R., Davé, R., Ostriker, J. P., Yu, Q.
We use large-scale cosmological simulations to estimate the mass-to-light ratio of galaxy systems as a function of scale, and compare the results with observations of galaxies, groups, clusters, and...
Cooling flows and quasars: II. Detailed models of feedback modulated accretion flows (1999)
Most elliptical galaxies contain central black holes (BHs), and most also contain significant amounts of hot gas capable of accreting on to the central BH due to cooling times short compared to the...
The Cosmic Triangle: Revealing the State of the Universe (1999)
Bahcall, N., Ostriker, J. P., Perlmutter, S., Steinhardt, P. J.
The "cosmic triangle" is introduced as a way of representing the past, present, and future status of the universe. Our current location within the cosmic triangle is determined by the answers to...
Frenk, C. S., White, S. D. M., Bode, P., Bond, J. R., Bryan, G. L., Cen, R., ...
We have simulated the formation of an X-ray cluster in a cold dark matter universe using 12 different codes. The codes span the range of numerical techniques and implementations currently in use,...
Cosmic Concordance and Quintessence (1999)
Wang, Limin, Caldwell, R. R., Ostriker, J. P., Steinhardt, Paul J.
We present a comprehensive study of the observational constraints on spatially flat cosmological models containing a mixture of matter and quintessence --- a time varying, spatially inhomogeneous...
Relaxation in stellar systems and the shape and rotation of the inner dark halo (1998)
Why do galactic bars rotate with high pattern speeds, when dynamical friction should rapidly couple the bar to the massive, slowly rotating dark halo? This longstanding paradox may be resolved by...
Miralda-Escude, J., Rauch, M., Sargent, W. L. W., Barlow, T. A., Weinberg, D. H., Hernquist, L., ...
We propose a new method of analysis for the \lya forest, namely to measure the 1-point and 2-point joint probability distribution of the transmitted flux. The results for a sample of seven observed...
Cooling flows and quasars: different aspects of the same phenomenon? I. Concepts (1997)
We present a new class of solutions for the gas flows in elliptical galaxies containing massive central black holes (BH). Modified King model galaxies are assumed. Two source terms operate: mass loss...
Rauch, M., Miralda-Escude, J., Sargent, W. L. W., Barlow, T. A., Weinberg, D. H., Hernquist, L., ...
We have measured the distribution function of the flux decrement caused by Lyman alpha forest absorption in a new sample of high resolution QSO spectra. The observations are compared to the results...
Ostriker, J. P., Steinhardt, Paul J.
Observational constraints guide one forcefully to examine models in which the matter density is substantially less than critical density. Particularly noteworthy are those which are consistent with...
Can Standard Cosmological Models Explain the Observed Abell Cluster Bulk Flow? (1994)
Strauss, M. A., Cen, R., Ostriker, J. P., Lauer, T. R., Postman, M.
Lauer \& Postman (LP) observe that all Abell clusters with redshifts less than 15,000\kms\ appear to be participating in a bulk flow of 689 km s$^{-1}$ with respect to the Cosmic Microwave...
Nityananda, R., Ostriker, J.P.
The theory of gravitational lensing of background quasars by stars in the halo of a galaxy is considered. In the limiting case of small 'optical depth', only one star is close enough to the beam to...