259 citations · 4.2k across the 67 of their papers we have counts for
7 papers · 1 filter
Soft X-rays from disk galaxy halos, Ly-alpha emission from forming galaxies, and the z~1 Tully-Fisher relation
Jesper Sommer-Larsen
Extended, soft X-ray emission from the halo of a very large disk galaxy has been detected out to r~20-40 kpc. The luminosity and surface brightness distribution is in very good agr…
A Lyman-alpha blob in the GOODS South field: evidence for cold accretion onto a dark matter halo
Kim Nilsson, Johan P. U. Fynbo, Palle Moller +2
We report on the discovery of a z = 3.16 Lyman-alpha emitting blob in the GOODS South field. The blob has a total Ly-alpha luminosity of ~ 10^(43) erg s^(-1) and a diameter larger…
Discovery of a very extended X-ray halo around a quiescent spiral galaxy - the "missing link" of galaxy formation
Kristian Pedersen, Jesper Rasmussen, Jesper Sommer-Larsen +3
Hot gaseous haloes surrounding galaxies and extending well beyond the distribution of stars are a ubiquitous prediction of galaxy formation scenarios. The haloes are believed to co…
Properties of Intra-group Stars and Galaxies in Galaxy Groups: "Normal" versus "Fossil" Groups
Jesper Sommer-Larsen
Cosmological LCDM simulations of 12 M_vir~10^14 Msun galaxy groups have been performed, invoking star formation, chemical evolution with non-instantaneous recycling, metallicity de…
Simulating galaxy clusters -- I. Thermal and chemical properties of the intra-cluster medium
A. D. Romeo, J. Sommer-Larsen, L. Portinari +1
We have performed a series of N-body/hydrodynamical (TreeSPH) simulations of clusters and groups of galaxies, selected from cosmological N-body simulations within a CDM framewor…
The Formation of Fossil Galaxy Groups in the hierarchical Universe
E. D'Onghia, J. Sommer-Larsen, A. D. Romeo +4
We use a set of twelve high-resolution N-body/hydrodynamical simulations in the CDM cosmology to investigate the origin and formation rate of fossil groups (FGs), which are X-ra…
Simulating galaxy clusters : the ICM and the galaxy populations
Alessio D. Romeo, J. Sommer-Larsen, L. Portinari
Cosmological LambdaCDM TreeSPH simulations of the formation and evolution of galaxy groups and clusters have been performed. The simulations include: star formation, chemical evolu…