Search Publications
The stratigraphy of the Amenthes region, Mars: Time limits for the formation of fluvial, volcanic and tectonic landforms
Hiesinger, H.; Ivanov, M. A.; Erkeling, G. +2 more
We present results of our morphologic and stratigraphic investigations in the Amenthes region for which our observations suggest a complex spatial and temporal interrelation between volcanic and possibly water-related processes. We have produced a series of self-consistent geological maps and a stratigraphic correlation chart that show the spatial…
The high-velocity cloud complex Galactic center negative as seen by EBHIS and GASS. I. Cloud catalog and global properties
Kerp, J.; Winkel, B.; Flöer, L. +3 more
Using Milky Way data of the new Effelsberg-Bonn H i Survey (EBHIS) and the Galactic All-Sky Survey (GASS), we present a revised picture of the high-velocity cloud (HVC) complex Galactic center negative (GCN). Owing to the higher angular resolution of these surveys compared to previous studies (e.g., the Leiden Dwingeloo Survey), we resolve complex…
First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-scale Features
Gaensler, B. M.; Ng, C. -Y.; Staveley-Smith, L. +5 more
We present a detailed analysis of the first very long baseline interferometry (VLBI) detection of the radio remnant of supernova 1987A. The VLBI data taken in 2007 and 2008 at 1.4 and 1.7 GHz, respectively, provide images sensitive to angular scales from 0farcs1 to 0farcs7, the highest resolution to date at radio frequencies. The results reveal tw…
Results from the 2009 campaign on WR 140
Williams, Peredur
The archetypal Wolf-Rayet + O star colliding-wind binary WR 140 has a very elliptical orbit, so that maximum interaction between the WR and O winds, and the most rapid changes in configuration, occur around periastron passage. To exploit this laboratory for studying wind-collision and high-energy phenomena, several groups mounted campaigns to obse…
On the stability of clathrate hydrates in comets 67P/Churyumov-Gerasimenko and 46P/Wirtanen
Weaver, H. A.; Mousis, O.; Schmitt, B. +3 more
Context. For several years, Jupiter-family comets have been the targets of spacecraft missions whose aims are to determine the comets' composition, structure, and physical properties. The Rosetta mission is currently flying towards comet 67P/Churyumov Gerasimenko for a rendezvous in August 2014 and comet 46P/Wirtanen is considered for a rendezvous…
The Mass-Radius Relation for Star-forming Galaxies at z ~ 1.5-3.0
Shapley, Alice E.; Steidel, Charles C.; Law, David R. +1 more
We present early results from a Hubble Space Telescope WFC3/IR imaging survey of star-forming galaxies in the redshift range 1.5 < z < 3.0. When complete, this survey will consist of 42 orbits of F160W imaging distributed amongst 10 survey fields on the line of sight to bright background QSOs, covering 65 arcmin2 to a depth of 27.…
AKARI Near-infrared Spectral Observations of Shocked H2 Gas of the Supernova Remnant IC 443
Koo, Bon-Chul; Lee, Ho-Gyu; Seon, Kwang-Il +1 more
We present near-infrared (2.5-5.0 µm) spectra of shocked H2 gas in the supernova remnant IC 443, obtained with the satellite AKARI. Three shocked clumps—known as B, C, and G—and one background region were observed, and only H2 emission lines were detected. Except in clump B, the extinction-corrected level population sho…
A galaxy as the source of a C IV absorption system close to the epoch of reionization
Pettini, Max; Madau, Piero; Díaz, C. Gonzalo +2 more
We find a bright (LUV= 2.5 L★z= 6) Lyα emitter (LAE) at redshift z= 5.719 at a projected distance of 79 physical kpc from a strong triply ionized carbon (C IV) absorption system at redshift z= 5.7238 previously reported in the spectrum of the zem= 6.309 quasi-stellar object SDSS J1030+0524. This is the h…
Studying methane and other trace species in the Mars atmosphere using a SOIR instrument
Daerden, F.; Robert, S.; Neary, L. +7 more
Solar Occultation in the InfraRed (SOIR) is one of three spectrometers of the SPICAV/SOIR instrument suite ( Bertaux et al., 2007b) on board the Venus Express orbiter (VEX). VEX has been in orbit around Venus since April 2006 and to date SOIR has carried out over 674 measurements. Pre-launch and in-orbit performance analyses allow us to predict wh…
High-Resolution Optical and Near-Infrared Images of the FS Tauri Circumbinary Disk
Hayashi, Masahiko; Fukagawa, Misato; Itoh, Yoichi +2 more
We present an H-band image of FS Tauri, a 0.''2-separated classical T Tauri binary system, taken with the Coronagraphic Imager with Adaptive Optics (CIAO) on the Subaru Telescope. This new image, combined with Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) F606W-band polarimetric images, shows that the binary has complicated circumbi…