Search Publications
Dust temperature tracing the ISRF intensity in the Galaxy
Juvela, M.; Lagache, G.; Marshall, D. J. +29 more
New observations with Herschel allow accurate measurement of the equilibrium temperature of large dust grains heated by the interstellar radiation field (ISRF), which is critical in deriving dust column density and masses. We present temperature maps derived from the Herschel SPIRE and PACS data in two fields along the Galactic plane, obtained as …
First detection of VHE γ-rays from SN 1006 by HESS
Klochkov, D.; Santangelo, A.; Quirrenbach, A. +178 more
Aims: Recent theoretical predictions of the lowest very high energy (VHE) luminosity of SN 1006 are only a factor 5 below the previously published HESS upper limit, thus motivating further in-depth observations of this source.
Methods: Deep observations at VHE energies (above 100 GeV) were carried out with the high energy stereoscopic sy…
The ACS Fornax Cluster Survey. VIII. The Luminosity Function of Globular Clusters in Virgo and Fornax Early-type Galaxies and Its Use as a Distance Indicator
Jordán, Andrés; Infante, Leopoldo; Tonry, John L. +8 more
We use a highly homogeneous set of data from 132 early-type galaxies in the Virgo and Fornax clusters in order to study the properties of the globular cluster luminosity function (GCLF). The globular cluster system of each galaxy was studied using a maximum likelihood approach to model the intrinsic GCLF after accounting for contamination and comp…
Superrotation of Venus' atmosphere analyzed with a full general circulation model
Lebonnois, Sébastien; Hourdin, Frédéric; Eymet, Vincent +3 more
A general circulation model (GCM) has been developed for the Venus atmosphere, from the surface up to 100 km altitude, based on the GCM developed for Earth at our laboratory. Key features of this new GCM include topography, diurnal cycle, dependence of the specific heat on temperature, and a consistent radiative transfer module based on net exchan…
A Deep Hubble Space Telescope Search for Escaping Lyman Continuum Flux at z ~ 1.3: Evidence for an Evolving Ionizing Emissivity
Dickinson, Mark; Ferguson, Henry C.; Giavalisco, Mauro +10 more
We have obtained deep Hubble Space Telescope far-UV images of 15 starburst galaxies at z ~ 1.3 in the GOODS fields to search for escaping Lyman continuum (LyC) photons. These are the deepest far-UV images (m AB = 28.7, 3σ, 1'' diameter) over this large an area (4.83 arcmin2) and provide some of the best escape fraction constr…
Herschel-SPIRE observations of the Polaris flare: Structure of the diffuse interstellar medium at the sub-parsec scale
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +43 more
We present a power spectrum analysis of the Herschel-SPIRE observations of the Polaris flare, a high Galactic latitude cirrus cloud midway between the diffuse and molecular phases. The SPIRE images of the Polaris flare reveal for the first time the structure of the diffuse interstellar medium down to 0.01 parsec over a 10 square degrees region. Th…
Evolution of dust temperature of galaxies through cosmic time as seen by Herschel
Berta, S.; Magnelli, B.; Nordon, R. +112 more
We study the dust properties of galaxies in the redshift range 0.1 <~ z <~ 2.8 observed by the Herschel Space Observatory in the field of the Great Observatories Origins Deep Survey-North as part of the PACS Extragalactic Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) key programmes. Infrared (IR) luminosity (LIR
Eight γ-ray Pulsars Discovered in Blind Frequency Searches of Fermi LAT Data
Caraveo, P. A.; de Luca, A.; Abdo, A. A. +34 more
We report the discovery of eight γ-ray pulsars in blind frequency searches of ~650 source positions using the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. We present the timing models, light curves, and detailed spectral parameters of the new pulsars. PSRs J1023-5746, J1044-5737, J1413-5205, J1429-5911, and J1954+2836 …
The NGC 404 Nucleus: Star Cluster and Possible Intermediate-mass Black Hole
Caldwell, Nelson; Neumayer, Nadine; Olsen, Knut +8 more
We examine the nuclear morphology, kinematics, and stellar populations in nearby S0 galaxy NGC 404 using a combination of adaptive optics assisted near-IR integral-field spectroscopy, optical spectroscopy, and Hubble Space Telescope imaging. These observations enable study of the NGC 404 nucleus at a level of detail possible only in the nearest ga…
Interstellar OH+, H2O+ and H3O+ along the sight-line to G10.6-0.4
Perault, M.; Boulanger, F.; Falgarone, E. +50 more
We report the detection of absorption lines by the reactive ions OH+, H2O+and H3O+ along the line of sight to the submillimeter continuum source G10.6-0.4 (W31C). We used the Herschel HIFI instrument in dual beam switch mode to observe the ground state rotational transitions of OH+ …