Now showing items 1-10 of 104
The radial velocity dispersion profile of the Galactic halo: constraining the density profile of the dark halo of the Milky Way
(Blackwell Science Ltd, 2005-12)
We have compiled a new sample of 240 halo objects with accurate distance and radial velocity measurements, including globular clusters, satellite galaxies, field blue horizontal branch (FHB) stars and red giant stars from ...
Radio–optical flux behaviour and spectral energy distribution of the intermediate blazar GC 0109+224
(Blackwell Science Ltd, 2004-03)
About 20 years of radio observations of the BL Lac object GC 0109+224 (S2 0109+22, RGB J0112+227) in five bands (from 4.8 to 37 GHz) are presented and analysed together with optical data. Over the past 10 years this blazar ...
Evolution of the dark matter phase-space density distributions of ΛCDM haloes
(Blackwell Publishing Ltd, 2009-05-21)
We study the evolution of phase-space density during the hierarchical structure formation of Λ cold dark matter (CDM) haloes. We compute both a spherically averaged surrogate for phase-space density ( Q =Ρ/Σ 3 ) and the ...
Three-dimensional dust radiative-transfer models: the Pinwheel Nebula of WR 104
(Blackwell Science Ltd, 2004-05)
We present radiative-transfer modelling of the dusty spiral Pinwheel Nebula observed around the Wolf–Rayet/OB-star binary WR 104. The models are based on the three-dimensional radiative-transfer code torus, modified to ...
Limitations of anthropic predictions for the cosmological constant & Lambda;: cosmic heat death of anthropic observers
(2008)
"This paper investigates anthropic bounds on the vacuum energy L by considering alternate starting assumptions. We first consider the possibility of cosmic observers existing at any random time (including the future) for ...
Stars in other universes: stellar structure with different fundamental constants
(2008)
"Motivated by the possible existence of other universes, with possible variations in the laws of physics, this paper explores the parameter space of fundamental constants that allows for the existence of stars. To make ...
HR 710 (HD 15144): an ultra-Sr-rich, magnetic Ap star with a close companion ★
(Blackwell Publishing Ltd, 2008-03-11)
The magnetic, chemically peculiar A-star HR 710 (HD 15144, ADS 1849A, AB Cet) has a close companion in a nearly circular orbit. Its 3-d period is unusually short for such stars. The system emits moderately hard X-rays, ...
LETTER: The Life and Times of Extremal Black Holes
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 2000-11)
Charged extremal black holes cannot fully evaporate through the Hawking effect and are thus long lived. Over their lifetimes, these black holes take part in a variety of astrophysical processes, including many that lead ...
The effects of young embedded groups and clusters on forming solar systems
(2008)
"Most stars--and hence most solar systems--form within groups or clusters. This contribution discusses how these star forming environments affect the planetary systems forming within them. The discussion starts with the ...
The imprint of massive black hole formation models on the LISA data stream
(Blackwell Publishing Ltd, 2007-06-01)
The formation, merging and accretion history of massive black holes (MBHs) along the hierarchical build-up of cosmic structures leaves a unique imprint on the background of gravitational waves (GWs) at mHz frequencies. We ...