Search Publications
Herschel-SPIRE, far-infrared properties of millimetre-bright and -faint radio galaxies
Pérez-Fournon, I.; Rodighiero, G.; Ivison, R. J. +34 more
We present the first study of the far-infrared (FIR) properties of high-redshift, radio-selected ultraluminous infrared galaxies (ULIRGs) using deep observations obtained with the Spectral and Photometric Imaging Receiver (SPIRE) from the Herschel Multi-tiered Extragalactic Survey (HerMES). These galaxies span a large range of 850-µm fluxes …
Herschel-ATLAS: The angular correlation function of submillimetre galaxies at high and low redshift
Rodighiero, G.; de Zotti, G.; Herranz, D. +36 more
We present measurements of the angular correlation function of galaxies selected from the first field of the H-ATLAS survey. Careful removal of the background from galactic cirrus is essential, and currently dominates the uncertainty in our measurements. For our 250 µm-selected sample we detect no significant clustering, consistent with the …
The physical properties of the dust in the RCW 120 H II region as seen by Herschel
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +43 more
Context. RCW 120 is a well-studied, nearby Galactic H ii region with ongoing star formation in its surroundings. Previous work has shown that it displays a bubble morphology at mid-infrared wavelengths, and has a massive layer of collected neutral material seen at sub-mm wavelengths. Given the well-defined photo-dissociation region (PDR) boundary …
A precise measurement of the solar differential rotation by tracing small bright coronal structures in SOHO-EIT images. Results and comparisons for the period 1998-2006
Hanslmeier, A.; Wöhl, H.; Brajša, R. +1 more
Aims: We precisely determine the solar rotation velocity during most of the 23rd solar cycle, in the years 1998-2006. We measure the solar differential rotation by tracing small bright coronal structures (SBCS) in SOHO-EIT images.
Methods: The 28.4 nm EIT channel was used and positions of more than 55 000 structures were measured applyin…
Microscopy analysis of soils at the Phoenix landing site, Mars: Classification of soil particles and description of their optical and magnetic properties
Arvidson, R. E.; Morris, R. V.; Keller, H. U. +25 more
The optical microscope onboard the Phoenix spacecraft has returned color images (4 µm pixel-1) of soils that were delivered to and held on various substrates. A preliminary taxonomy of Phoenix soil particles, based on color, size, and shape, identifies the following particle types [generic names in brackets]: (1) reddish fines, mo…
Galaxies Probing Galaxies: Cool Halo Gas from a z = 0.47 Post-Starburst Galaxy
Weiner, Benjamin J.; Prochaska, J. Xavier; Koo, David C. +2 more
We study the cool gas around a galaxy at z = 0.4729 using Keck/LRIS spectroscopy of a bright (B = 21.7) background galaxy at z = 0.6942 at a transverse distance of 16.5h -1 70 kpc. The background galaxy spectrum reveals strong Fe II, Mg II, Mg I, and Ca II absorption at the redshift of the foreground galaxy, with an Mg II λ27…
A Quantitative Model of Energy Release and Heating by Time-dependent, Localized Reconnection in a Flare with Thermal Loop-top X-ray Source
Qiu, J.; Longcope, D. W.; Des Jardins, A. C. +1 more
We present a quantitative model of the magnetic energy stored and then released through magnetic reconnection for a flare on 26 February 2004. This flare, well observed by RHESSI and TRACE, shows evidence of non-thermal electrons for only a brief, early phase. Throughout the main period of energy release there is a super-hot (T≳30 MK) plasma emitt…
Discovery of Compton-thick quasars in the Sloan Digital Sky Survey
Pozzi, F.; Alexander, D. M.; Vignali, C. +1 more
We present new and archival Chandra snapshot (~10ks each) observations of 15 optically identified [from the Sloan Digital Sky Survey (SDSS)] Type 2 quasars at z = 0.40-0.73. When combined with existing X-ray data, this work provides complete X-ray coverage for all 25 radio-quiet Type 2 quasars with logL[OIII] > 9.28Lsolar …
The extrasolar planet Gliese 581d: a potentially habitable planet?
Rauer, H.; von Paris, P.; Grenfell, J. L. +6 more
Aims: The planetary system around the M star Gliese 581 contains at least three close-in potentially low-mass planets, Gl 581c, d, and e. In order to address the question of the habitability of Gl 581d, we performed detailed atmospheric modeling studies for several planetary scenarios.
Methods: A 1D radiative-convective model was used to…
A self-consistent approach to the hard and soft states of 4U 1705-44
Santangelo, A.; Robba, N. R.; Papitto, A. +10 more
Context. High-resolution spectroscopy has recently revealed in many low-mass X-ray binaries hosting a neutron star that the shape of the broad iron line observed in the 6.4-6.97 keV range is consistently well-fitted by a relativistically smeared line profile.
Aims: The presence of other broad features, besides the iron line, together with a h…