5k citations · 37.1k across the 535 of their papers we have counts for
16 papers · 2 filters
Dark Matter and Galaxy Formation: Challenges for the Next Decade
Joseph Silk
The origin of the galaxies represents an important focus of current cosmological research, both observational and theoretical. Its resolution involves a comprehensive understanding…
The Polytropic Equation of State of Primordial Gas Clouds
Marco Spaans, Joseph Silk
The polytropic equation of state (EOS) of primordial gas clouds with modest enrichment is computed, motivated by the recent observations of very Fe-deficient stars, [Fe/H]~10^{-3.5…
LOFAR as a Probe of the Sources of Cosmological Reionisation
Saleem Zaroubi, Joseph Silk
We propose use of the thickness of the ionisation front as a discriminant between alternative modes of reionisation in the early universe, by stars or by miniquasars. Assuming a ph…
Towards simulating star formation in the interstellar medium
A. Slyz, J. Devriendt, Greg Bryan +1
As a first step to a more complete understanding of the local physical processes which determine star formation rates (SFRs) in the interstellar medium (ISM), we have performed con…
Feedback and the Initial Mass function
Joseph Silk
I describe a turbulence-inspired model for the stellar initial mass function which includes feedback and self-regulation via protostellar outflows. A new aspect of the model provid…
Have Atmospheric Cerenkov Telescopes Observed Dark Matter?
Dan Hooper, Ignacio de la Calle Perez, Joseph Silk +2
Two ground-based experiments have recently independently detected TeV -rays from the direction of the Galactic center. The observations made by the VERITAS and CANGAROO collabor…
Cosmic Star Formation, Reionization, and Constraints on Global Chemical Evolution
Frederic Daigne, Keith A. Olive, Elisabeth Vangioni-Flam +2
Motivated by the WMAP results indicating an early epoch of reionization, we consider alternative cosmic star formation models which are capable of reionizing the early intergalacti…
On the excess of power in high resolution CMB experiments
J. M. Diego, P. Vielva, E. Martinez-Gonalez +1
We revisit the possibility that an excess in the CMB power spectrum at small angular scales (CBI, ACBAR) can be due to galaxy clusters (or compact sources in general). We perform a…
Neutrinos from Dark Matter annihilations at the Galactic Centre
Gianfranco Bertone, Emmanuel Nezri, Jean Orloff +1
We discuss the prospects for detection of high energy neutrinos from dark matter annihilation at the Galactic centre. Despite the large uncertainties associated with our poor knowl…
The star formation history of intermediate redshift late-type galaxies
I. Ferreras, J. Silk, A. Boehm +1
We combine the latest observations of disk galaxy photometry and rotation curves at moderate redshift from the FORS Deep Field (FDF) with simple models of chemical enrichment. Our…
Are Domain Walls ruled out ?
Luca Conversi, Alessandro Melchiorri, Laura Mersini +1
Recent analysis of the combined data of cosmic microwave background, galaxy clustering and supernovae type Ia observations have set strong constraints on the equation of state para…
A new method for measuring the CMB temperature quadrupole with an accuracy better than cosmic variance
Constantinos Skordis, Joseph Silk
We present a new method for measuring the CMB temperature quadrupole, using large scale CMB polarization. The method exploits the fact that CMB polarization is partially sourced by…
A new search for features in the primordial power spectrum
Domenico Tocchini-Valentini, Marian Douspis, Joseph Silk
We develop a new approach toward a high resolution non-parametric reconstruction of the primordial power spectrum using WMAP cosmic microwave background temperature anisotropies th…
An Erupting Classical Nova in a Globular Cluster of M87
Michael M. Shara, David R. Zurek, Edward A. Baltz +2
Only one certain classical nova eruption has ever been detected inside a globular cluster - nova 1860 A.D. (T Sco) in M80. During a survey of M87 we have detected an erupting star…
Some Current Issues in Galaxy Formation
Joseph Silk
I describe recent challenges in hierarchical galaxy formation theory, including the formation of disk galaxies and of ellipticals. Problems with cold dark matter are summarized, an…
A simple model for the evolution of super-massive black holes and the quasar population
Asim Mahmood, Julien E. G. Devriendt, Joseph Silk
An empirically motivated model is presented for accretion-dominated growth of the super massive black holes (SMBH) in galaxies, and the implications are studied for the evolution o…