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The 2009-2010 fade of Jupiter's South Equatorial Belt: Vertical cloud structure models and zonal winds from visible imaging
Sánchez-Lavega, A.; Rojas, J. F.; Pérez-Hoyos, S. +3 more
The South Equatorial Belt (SEB) of Jupiter is known to alternate its appearance at visible wavelengths from a classical belt-like band most of the time to a short-lived zone-like aspect which is called a "fade" of the belt, hereafter SEBF. The albedo change of the SEB is due to a change in the structure and properties of the clouds and upper hazes…
The G305 star-forming complex: embedded massive star formation discovered by Herschel Hi-GAL
Molinari, S.; Veneziani, M.; Thompson, M. A. +7 more
We present a Herschel far-infrared study towards the rich massive star-forming complex G305, utilizing PACS 70, 160 µm and SPIRE 250, 350, and 500 µm observations from the Hi-GAL survey of the Galactic plane. The focus of this study is to identify the embedded massive star-forming population within G305, by combining far-infrared data …
The jet-cloud interacting radio galaxy PKS B2152-699 - I. Structures revealed in new deep radio and X-ray observations
Young, A. J.; Birkinshaw, M.; Worrall, D. M. +5 more
PKS B2152-699, which has radio power characteristic of sources that dominate radio feedback, is exceptional in showing a wide range of features associated with radio-galaxy/gas interactions. We present new deep radio (Australia Telescope Compact Array), X-ray (Chandra) and ground-based optical observations, and test the energetics of the feedback …
Titan's lakes chemical composition: Sources of uncertainties and variability
Lunine, J. I.; Cordier, D.; Mousis, O. +5 more
Between 2004 and 2007 the instruments of the Cassini spacecraft, orbiting within the Saturn system, discovered dark patches in the polar regions of Titan. These features are interpreted as hydrocarbon lakes and seas with ethane and methane identified as the main compounds. In this context, we have developed a lake-atmosphere equilibrium model allo…
The evolutionary connection between QSOs and SMGs: molecular gas in far-infrared luminous QSOs at z ∼ 2.5
Ivison, R. J.; Clements, D. L.; de Zotti, G. +23 more
We present Institut de Radioastronomie Millimétrique Plateau de Bure Interferometer observations of the 12CO (3-2) emission from two far-infrared luminous QSOs at z ∼ 2.5 selected from the Herschel-Astrophysical Tetrahertz Large Area Survey. These far-infrared bright QSOs were selected to have supermassive black holes (SMBHs) with masse…
New results on planetary lightning
Yair, Yoav
We present the latest observations from spacecraft and ground-based instruments in search for lightning activity in the atmospheres of planets in the solar system, and put them in context of previous research. Since the comprehensive book on planetary atmospheric electricity compiled by Leblanc et al. (2008), advances in remote sensing technology …
The ACS LCID Project. VII. The Blue Stragglers Population in the Isolated dSph Galaxies Cetus and Tucana
Hidalgo, S. L.; Mayer, L.; Stetson, P. B. +8 more
We present the first investigation of the Blue Straggler star (BSS) population in two isolated dwarf spheroidal galaxies of the Local Group, Cetus and Tucana. Deep Hubble Space Telescope/Advanced Camera for Surveys photometry allowed us to identify samples of 940 and 1214 candidates, respectively. The analysis of the star formation histories of th…
Discovery of Two Supernovae in the Nuclear Regions of the Luminous Infrared Galaxy IC 883
Colina, L.; Kankare, E.; Efstathiou, A. +10 more
We report the discovery of two consecutive supernovae (SNe), 2010cu and 2011hi, located at 0farcs37 (180 pc) and 0farcs79 (380 pc) projected distance, respectively, from the center of the K-band nucleus of the luminous infrared galaxy (LIRG) IC 883. The SNe were discovered in an ongoing near-infrared K-band search for core-collapse SNe in such gal…
The Optical and Ultraviolet Emission-line Properties of Bright Quasars with Detailed Spectral Energy Distributions
Gu, Qiusheng; Shang, Zhaohui; Brotherton, Michael S. +2 more
We present measurements and statistical properties of the optical and ultraviolet emission lines present in the spectra of 85 bright quasars which have detailed spectral energy distributions. This heterogeneous sample has redshifts up to z = 1.5 and is comprised of three subsamples that may be of particular utility: ultraviolet excess Palomar-Gree…
The Unimodal Distribution of Blue Straggler Stars in M75 (NGC 6864)
Dalessandro, E.; Contreras Ramos, R.; Ferraro, F. R. +2 more
We have used a combination of multiband high-resolution and wide-field ground-based observations to image the Galactic globular cluster M75 (NGC 6864). The extensive photometric sample covers the entire cluster extension, from the very central regions out to the tidal radius, allowing us to determine the center of gravity and to construct the most…