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Aspherical Core-Collapse Supernovae in Red Supergiants Powered by Nonrelativistic Jets
Sean M. Couch, J. Craig Wheeler, Milos Milosavljevic
We explore the observational characteristics of jet-driven supernovae by simulating bipolar-jet-driven explosions in a red supergiant progenitor. We present results of four models…
Accretion onto Intermediate-Mass Black Holes in Dense Protogalactic Clouds
Milos Milosavljevic, Sean M. Couch, Volker Bromm
We present the first results from two-dimensional simulations of radiatively-efficient accretion of metal-free gas onto intermediate-mass black holes. We fix the shape of the spect…
Accretion onto Seed Black Holes in the First Galaxies
Milos Milosavljevic, Volker Bromm, Sean M. Couch +1
The validity of the hypothesis that the massive black holes in high redshift quasars grew from stellar-sized "seeds" is contingent on a seed's ability to double its mass every few…
Shock Vorticity Generation from Accelerated Ion Streaming in the Precursor of Ultrarelativistic Gamma-Ray Burst External Shocks
Sean M. Couch, Milos Milosavljevic, Ehud Nakar
We investigate the interaction of nonthermal ions (protons and nuclei) accelerated in an ultrarelativistic blastwave with the pre-existing magnetic field of the medium into which t…
The Cluster-Merger Shock in 1E 0657-56
Jun Koda, Milos Milosavljevic, Paul R. Shapiro +2
The merging galaxy cluster 1E 0657-56, known as the "bullet cluster," is one of the hottest clusters known. The X-ray emitting plasma exhibits bow-shock-like temperature and densit…
On The Survival and Abundance of Disk-dominated Galaxies
Jun Koda, Milos Milosavljevic, Paul R. Shapiro
We study the formation of disk-dominated galaxies in a Lambda CDM universe. Their existence is considered to be a challenge for the Lambda CDM cosmology, because galaxy mergers iso…
Vorticity and Magnetic Field Generation from Initial Anisotropy in Ultrarelativistic Gamma-Ray Burst Blastwaves
Milos Milosavljevic, Ehud Nakar, Fan Zhang
Because conical segments of quasispherical ultrarelativistic blastwaves are causally disconnected on angular scales larger than the blastwave inverse Lorentz factor, astrophysical…
Cluster Merger Shock Constraints on Particle Acceleration and Nonthermal Pressure in the Intracluster Medium
Ehud Nakar, Milos Milosavljevic, Daisuke Nagai
X-ray observations of galaxy cluster merger shocks can be used to constrain nonthermal processes in the intracluster medium (ICM). The presence of nonthermal pressure components in…
The Cluster-Merger Shock in 1E 0657-56: Faster than the Speeding Bullet?
Milos Milosavljevic, Jun Koda, Daisuke Nagai +2
Shock waves driven in the intergalactic medium during the merging of galaxy clusters have been observed in X-ray imaging and spectroscopy. Fluid motions inferred from the shock str…
An Eccentric Circumbinary Accretion Disk and the Detection of Binary Massive Black Holes
Andrew I. MacFadyen, Milos Milosavljevic
We present a two-dimensional grid-based hydrodynamic simulation of a thin, viscous, locally-isothermal corotating disk orbiting an equal-mass Newtonian binary point mass on a fixed…
The ACS Virgo Cluster Survey. VI. Isophotal Analysis and the Structure of Early-Type Galaxies
Laura Ferrarese, Patrick Cote, Andres Jordan +8
(Abridged) We present a detailed analysis of the morphology, isophotal parameters and surface brightness profiles for 100 early-type members of the Virgo Cluster, from dwarfs (M_B…
Contribution of Stellar Tidal Disruptions to the X-Ray Luminosity Function of Active Galaxies
Milos Milosavljevic, David Merritt, Luis C. Ho
The luminosity function of active galactic nuclei has been measured down to luminosities ~10^{42} erg/s in the soft and hard X-rays. Some fraction of this activity is associated wi…
Astrometric Monitoring of Stellar Orbits at the Galactic Center with a Next Generation Large Telescope
Nevin N. Weinberg, Milos Milosavljevic, Andrea M. Ghez
We show that with a Next Generation Large Telescope one can detect the accelerated motions of ~100 stars orbiting the massive black hole at the Galactic center. The positions and v…
The Cosmic Ray Precursor of Relativistic Collisionless Shocks: A Missing Link in Gamma-Ray Burst Afterglows
Milos Milosavljevic, Ehud Nakar
Collisionless shocks are commonly argued to be the sites of cosmic ray (CR) acceleration. We study the influence of CRs on weakly magnetized relativistic collisionless shocks and a…
The ACS Virgo Cluster Survey XI. The Nature of Diffuse Star Clusters in Early-Type Galaxies
Eric W. Peng, Patrick Cote, Andres Jordan +7
We use HST/ACS imaging of 100 early-type galaxies in the ACS Virgo Cluster Survey to investigate the nature of diffuse star clusters (DSCs). Compared to globular clusters (GCs), th…
Cluster Merger Variance and the Luminosity Gap Statistic
Milos Milosavljevic, Christopher J. Miller, Steven R. Furlanetto +1
The presence of multiple luminous galaxies in clusters can be explained by the finite time over which a galaxy sinks to the center of the cluster and merges with the the central ga…
Weibel Filament Decay and Thermalization in Collisionless Shocks and Gamma-Ray Burst Afterglows
Milos Milosavljevic, Ehud Nakar
Models for the synchrotron emission of gamma-ray burst afterglows suggest that the magnetic field is generated in the shock wave that forms as relativistic ejecta plow through the…
The ACS Virgo Cluster Survey X. Half-light Radii of Globular Clusters in Early-Type Galaxies: Environmental Dependencies and a Standard Ruler for Distance Estimation
Andres Jordan, Patrick Cote, John P. Blakeslee +10
We have measured half-light radii, r_h, for globular clusters (GCs) belonging to the 100 early-type galaxies observed in the ACS Virgo Cluster Survey and the elliptical galaxy NGC…
Steady-State Electrostatic Layers from Weibel Instability in Relativistic Collisionless Shocks
Milos Milosavljevic, Ehud Nakar, Anatoly Spitkovsky
It is generally accepted that magnetic fields generated in the nonlinear development of the transverse Weibel instability provide effective collisionality in unmagnetized collision…
What is L*?: Anatomy of the Galaxy Luminosity Function
Asantha Cooray, Milos Milosavljevic
Using the empirical relations between the central galaxy luminosity and the halo mass, and between the total galaxy luminosity in a halo and the halo mass, we construct the galaxy…
Dissipationless Merging and the Assembly of Central Galaxies
Asantha Cooray, Milos Milosavljevic
We reanalyze the galaxy-mass correlation function measured by the Sloan Digital Sky Survey to obtain host dark matter halo masses at galaxy and galaxy group scales. We extend the d…
The ACS Virgo Cluster Survey. VII. Resolving the Connection Between Globular Clusters and Ultra-Compact Dwarf Galaxies
Monica Hasegan, Andres Jordan, Patrick Cote +10
We investigate the connection between globular clusters and ultra-compact dwarf galaxies (UCDs) by examining the properties of several compact objects associated with M87, all of w…
The ACS Virgo Cluster Survey IV: Data Reduction Procedures for Surface Brightness Fluctuation Measurements with the Advanced Camera for Surveys
Simona Mei, John P. Blakeslee, John L. Tonry +7
The Advanced Camera for Surveys (ACS) Virgo Cluster Survey is a large program to image 100 early-type Virgo galaxies using the F475W and F850LP bandpasses of the Wide Field Channel…
Massive Black Hole Binary Evolution
David Merritt, Milos Milosavljevic
Coalescence of binary supermassive black holes (SBHs) would constitute the strongest sources of gravitational waves to be observed by LISA. While the formation of binary SBHs durin…