Search Publications
AGN torus emission for a homogeneous sample of bright flat-spectrum radio quasars
Castignani, G.; De Zotti, G.
We have selected a complete sample of 80 flat-spectrum radio quasars (FSRQs) from the Wilkinson Microwave Anisotropy Probe (WMAP) seven-year catalog within the Sloan Digital Sky Survey (SDSS) area, all with measured redshift, and have inspected their spectral energy distributions (SEDs) looking for evidence of an active galactic nucleus torus emis…
Chemical Abundances and Physical Parameters of HII Regions in the Magellanic Clouds
Meléndez, J.; Steiner, J.; Carlos Reyes, R. E. +2 more
We used ultraviolet, optical and infrared data of eleven HII regions in the Magellanic Clouds in order to determine their physical parameters and chemical abundances. The photoionization modeling of six HII regions in the LMC and five HII regions in the SMC, allowed us to derive the abundances of He, C, N, O, Ne, S and Ar, which were compared with…
Are the Bulk of z > 2 Herschel Galaxies Proto-Spheroids?
Pozzi, F.; Gruppioni, C.; Cresci, G. +6 more
We present a backward approach for the interpretation of the evolution of the near-IR and the far-IR luminosity functions (LFs) across the redshift range 0\lt z\lt 3. In our method, late-type galaxies are treated by means of a parametric phenomenological method based on PEP/HerMES data up to z ∼ 4, whereas spheroids are described by means of a phy…
Testing for foreground residuals in the Planck foreground cleaned maps: A new method for designing confidence masks
Hansen, F. K.; Axelsson, M.; Ihle, H. T. +1 more
We test for foreground residuals in the foreground-cleaned Planck cosmic microwave background (CMB) maps outside and inside the U73 mask commonly used for cosmological analysis. The aim of this paper is to introduce a new method of validating masks by looking at the differences in cleaned maps obtained by different component-separation methods. By…
Prediction of blue, red and green aurorae at Mars
Simon Wedlund, C.; Gronoff, G.; Lilensten, J. +3 more
The upper atmosphere of Mars is a laboratory for better understanding the planetary atmosphere evolution, and is an example of the interaction of the solar wind with an unmagnetized planet that has only patches of crustal magnetic field. In that context, several space missions were launched to study the Martian environment and its aurorae, notably…
Statistical investigation on the power-law behavior of magnetic fluctuations in the Venusian magnetosheath
Zhang, Tielong; Narita, Yasuhito; Schmid, Daniel +4 more
The present work aims to develop a better understanding of wave and turbulence processes in the planetary magnetosheath region. We study the plasma conditions (temperature, flow velocity, and magnetic field), the low-frequency wave properties, and the energy spectra for magnetic field fluctuations in the Venus magnetosheath. We use the magnetic fi…
Latitudinal and Energy Dependence of Energetic Neutral Atom Spectral Indices Measured by the Interstellar Boundary Explorer
McComas, D. J.; Fuselier, S. A.; Schwadron, N. A. +8 more
We investigate the latitudinal and energy dependence of the globally distributed 0.5-6 keV energetic neutral atom (ENA) spectra measured by the Interstellar Boundary Explorer (IBEX) during the first 3 yrs of the mission. Our results are: (1) the ENA spectral indices at the two lowest energies (0.89 and 1.47 keV) exhibit no clear trend with eclipti…
Energetic Particle Pressure at Interplanetary Shocks: STEREO-A Observations
Lario, D.; Roelof, E. C.; Decker, R. B. +1 more
We study periods of elevated energetic particle intensities observed by STEREO-A when the partial pressure exerted by energetic (≥83 keV) protons (PEP) is larger than the pressure exerted by the interplanetary magnetic field (PB). In the majority of cases, these periods are associated with the passage of interplanetary shocks…
Dust and Polycyclic Aromatic Hydrocarbon in the HD 34700 Debris Disk
Seok, Ji Yeon; Li, Aigen
The debris disk around the Vega-type star HD 34700 is detected in dust thermal emission from the near-infrared (IR) to millimeter (mm) and submm wavelength range. Also detected is a distinct set of emission features at 3.3, 6.2, 7.7, 8.6, 11.3, and 12.7 µ {{m}}, which are commonly attributed to polycyclic aromatic hydrocarbon (PAH) molecules…
Extinction and Nebular Line Properties of a Herschel-selected Lensed Dusty Starburst at z = 1.027
Ivison, R. J.; Baes, Maarten; Fu, Hai +17 more
We present Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging and grism spectroscopy observations of the Herschel-selected gravitationally lensed starburst galaxy HATLASJ1429-0028. The lensing system consists of an edge-on foreground disk galaxy at z = 0.218 with a nearly complete Einstein ring of the infrared luminous galaxy at z = 1.027. …