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184 papers · 1 filter
The rotation and coma profiles of comet C/2004 Q2 (Machholz)
Maarten Reyniers, Pieter Degroote, Dennis Bodewits +2
Aims. Rotation periods of cometary nuclei are scarce, though important when studying the nature and origin of these objects. Our aim is to derive a rotation period for the nucleus…
Phase-space structure in the local dark matter distribution and its signature in direct detection experiments
Mark Vogelsberger, Amina Helmi, Volker Springel +6
We study predictions for dark matter phase-space structure near the Sun based on high-resolution simulations of six galaxy halos taken from the Aquarius Project. The local DM densi…
Radio Interferometric Calibration Using The SAGE Algorithm
Sarod Yatawatta, Saleem Zaroubi, Ger de Bruyn +2
Radio Interferometry is an essential method for astronomical observations. Self-calibration techniques have increased the quality of the radio astronomical observations (and hence…
Broad-band X-ray spectral evolution of GX 339-4 during a state transition
M. Del Santo, T. M. Belloni, J. Homan +8
We report on X-ray and soft gamma-ray observations of the black-hole candidate GX 339-4 during its 2007 outburst, performed with the RXTE and INTEGRAL satellites. The hardness-inte…
On the common mass scale of the Milky Way satellites
Yang-Shyang Li, Amina Helmi, Gabriella De Lucia +1
We use a hybrid approach that combines high-resolution simulations of the formation of a Milky Way-like halo with a semi-analytic model of galaxy formation to study the mass conten…
High-excitation molecular gas in local luminous AGN hosts
Padeli P. Papadopoulos, A. Kovacs, A. S. Evans +1
We used the mm/sub-mm receivers on the James Clerk Maxwell Telescope (JCMT) to observe the CO J=3--2, 2--1 lines in five local, optically powerful AGN and the J=4--3 line in 3C 293…