Search Publications
GMASS ultradeep spectroscopy of galaxies at z ~ 2. VII. Sample selection and spectroscopy
Berta, S.; Cimatti, A.; Daddi, E. +12 more
Context. Ultra-deep imaging of small parts of the sky has revealed many populations of distant galaxies, providing insight into the early stages of galaxy evolution. Spectroscopic follow-up has mostly targeted galaxies with strong emission lines at z > 2 or concentrated on galaxies at z < 1.
Aims: The populations of both quiescent and a…
Three-dimensional Martian ionosphere model: I. The photochemical ionosphere below 180 km
Forget, F.; Chaufray, J. -Y.; Leblanc, F. +6 more
We describe the Mars ionosphere with unprecedented detail in 3-D, as simulated by a Mars general circulation model (the Laboratoire de Météorologie Dynamique Mars GCM), and compare it with recent measurements. The model includes a number of recent extensions and improvements. Different simulations for a full Martian year have been performed. The e…
Vindicating single-T modified blackbody fits to Herschel SEDs
Bianchi, S.
I show here that the bulk of the dust mass in a galaxy can be equivalently estimated from i) the full spectral energy distribution of dust emission, using the approach of Draine & Li (2007, ApJ, 657, 810) that includes a distribution of dust grains and a range of interstellar radiation field intensities; ii) the emission in the wavelength rang…
Geochemical Consequences of Widespread Clay Mineral Formation in Mars' Ancient Crust
Ehlmann, Bethany L.; Mangold, Nicolas; Chassefière, Eric +7 more
Clays form on Earth by near-surface weathering, precipitation in water bodies within basins, hydrothermal alteration (volcanic- or impact-induced), diagenesis, metamorphism, and magmatic precipitation. Diverse clay minerals have been detected from orbital investigation of terrains on Mars and are globally distributed, indicating geographically wid…
The First Hi-GAL Observations of the Outer Galaxy: A Look at Star Formation in the Third Galactic Quadrant in the Longitude Range 216.°5 <~ l <~ 225.°5
Rygl, K. L. J.; Schneider, N.; Benedettini, M. +17 more
We present the first Herschel PACS and SPIRE photometric observations in a portion of the outer Galaxy (216.°5 <~ l <~ 225.°5 and -2° <~ b <~ 0°) as a part of the Hi-GAL survey. The maps between 70 and 500 µm, the derived column density and temperature maps, and the compact source catalog are presented. NANTEN CO(1-0) line observ…
A Comprehensive Analysis of Fermi Gamma-Ray Burst Data. III. Energy-dependent T 90 Distributions of GBM GRBs and Instrumental Selection Effect on Duration Classification
Lin, Lin; Zhang, Bing; Liang, En-Wei +8 more
The durations (T 90) of 315 gamma-ray bursts (GRBs) detected with Fermi/GBM (8-1000 keV) up to 2011 September are calculated using the Bayesian Block method. We compare the T 90 distributions between this sample and those derived from previous/current GRB missions. We show that the T 90 distribution of this GRB sam…
Regimes of the Electron Diffusion Region in Magnetic Reconnection
Egedal, J.; Daughton, W.; Karimabadi, H. +3 more
The electron diffusion region during magnetic reconnection lies in different regimes depending on the pressure anisotropy, which is regulated by the properties of thermal electron orbits. In kinetic simulations at the weakest guide fields, pitch angle mixing in velocity space causes the outflow electron pressure to become nearly isotropic. Above a…
Planck constraints on single-field inflation
Kuroyanagi, Sachiko; Ohashi, Junko; Tsujikawa, Shinji +1 more
We place observational constraints on slow-variation single-field inflationary models by carrying out the cosmological Monte Carlo simulation with the recent data of Planck combined with the WMAP large-angle polarization, baryon acoustic oscillations, and Atacama Cosmology Telescope/South Pole Telescope temperature data. Our analysis covers a wide…
Probing the extreme planetary atmosphere of WASP-12b
Showman, Adam P.; Swain, Mark; Kawahara, Hajime +7 more
We report near-infrared measurements of the terminator region transmission spectrum and dayside emission spectrum of the exoplanet WASP-12b obtained using the HST WFC3 instrument. The disk-average dayside brightness temperature averages about 2900 K, peaking to 3200 K around 1.46 µm. We modeled a range of atmospheric cases for both the emiss…
Mapping Dust through Emission and Absorption in Nearby Galaxies
Gordon, Karl D.; Johnson, Benjamin D.; Hunt, Leslie K. +13 more
Dust has long been identified as a barrier to measuring inherent galaxy properties. However, the link between dust and attenuation is not straightforward and depends on both the amount of dust and its distribution. Herschel imaging of nearby galaxies undertaken as part of the KINGFISH project allows us to map the dust as seen in emission with unpr…