Search Publications
Detection of Mg spinel lithologies on central peak of crater Theophilus using Moon Mineralogy Mapper (M3) data from Chandrayaan-1
Bhattacharya, S.; Kiran Kumar, A. S.; Chauhan, P. +3 more
Spectral reflectance data derived from Moon Mineralogy Mapper (M3) onboard India's Chandrayaan-1 has revealed Fe bearing Mg-spinel-rich lithology on central peaks of the crater Theophilus. These newly identified Fe bearing Mg-spinel-rich rock types are defined by their strong 2-µm absorption and lack of 1-µm absorptions in s…
Dissociative recombination of nitrile ions with implications for Titan's upper atmosphere
Vigren, E.; Semaniak, J.; Hamberg, M. +6 more
Nitrile ions are abundant in Titan's upper atmosphere and are expected to be lost mainly via dissociative recombination with free electrons. We review in this paper a series of experimental results on the dissociative recombination reactions of nitrile ions known/expected to be present in Titan's upper atmosphere. The experiments were all performe…
Warm absorber energetics in broad-line radio galaxies
Costantini, E.; Grandi, P.; Torresi, E. +1 more
We review the soft X-ray properties of 3C 390.3, 3C 120, 3C 382 and 3C 445, the only broad-line radio galaxies (BLRGs) for which good quality gratings data are currently available. The XMM-Newton/Reflection Grating Spectrometer data of 3C 390.3 and 3C 120 were re-analysed searching for warm absorbers, already discovered in 3C 382 and 3C 445. We co…
The growth of wind-waves in Titan's hydrocarbon seas
Lorenz, Ralph D.; Hayes, Alexander G.
Ocean wave growth on Titan is considered. The classic Sverdrup-Munk theory for terrestrial wave growth is applied to Titan, and is compared with a simple energy balance model that exposes the effect of Titan's environmental parameters (air density, gravity, and fluid density). These approaches are compared with the only previously-published (semi-…
η Carinae: linelist for the emission spectrum of the Weigelt blobs in the 1700 to 10 400 Å wavelength region
Gull, T. R.; Johansson, S.; Hartman, H. +1 more
Aims: We present line identifications in the 1700 to 10 400 Å region for the Weigelt blobs B and D, located 0″.1 to 0″.3 NNW of
The Cosmic Web and galaxy evolution around the most luminous X-ray cluster: RX J1347.5-1145
Finoguenov, A.; Böhringer, H.; Hildebrandt, H. +5 more
In this paper we study large-scale structures and their galaxy content around the most X-ray luminous cluster known, RX J1347.5-1145 at z= 0.45. We make use of u*g'r'i'z' Canada-France-Hawaii Telescope (CFHT) MegaCam photometry together with VIsible MultiObject Spectrograph (VIMOS) Very Large Telescope (VLT) spectroscopy to identify structures aro…
The surface energy balance at the Huygens landing site and the moist surface conditions on Titan
McKay, Christopher P.; Williams, Kaj E.; Persson, Fredrik
The Huygens Probe provided a wealth of data concerning the atmosphere of Titan. It also provided tantalizing evidence of a small amount of surface liquid. We have developed a detailed surface energy balance for the Probe landing site. We find that the daily averaged non-radiative fluxes at the surface are 0.7 W m-2, much larger than the…
Polycyclic Aromatic Hydrocarbon Processing in the Blast Wave of the Supernova Remnant N132D
Rho, J.; Boersma, C.; Tappe, A. +1 more
We present Spitzer Infrared Spectrograph 14-36 µm mapping observations of the supernova remnant N132D in the Large Magellanic Cloud. This study focuses on the processing of polycyclic aromatic hydrocarbons (PAHs) that we previously identified in the southern blast wave. The mid-infrared spectra show strong continuum emission from shock-heate…
The Evolution and Environments of X-Ray Emitting Active Galactic Nuclei in High-redshift Large-scale Structures
Fassnacht, C. D.; Kocevski, D. D.; Lemaux, B. C. +5 more
We use deep Chandra imaging and an extensive optical spectroscopy campaign on the Keck 10 m telescopes to study the properties of X-ray point sources in two isolated X-ray-selected clusters, two superclusters, and one "supergroup" at redshifts of z ~ 0.7-0.9. We first study X-ray point sources using the statistical measure of cumulative source cou…
Radio-loud CMEs from the disk center lacking shocks at 1 AU
MacDowall, R. J.; Kaiser, M. L.; Gopalswamy, N. +4 more
A coronal mass ejection (CME) associated with a type II burst and originating close to the center of the solar disk typically results in a shock at Earth in 2-3 days and hence can be used to predict shock arrival at Earth. However, a significant fraction (about 28%) of such CMEs producing type II bursts were not associated with shocks at Earth. We…