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Submillimeter mapping of mesospheric minor species on Venus with ALMA
Lellouch, E.; Encrenaz, T.; Moreno, R. +2 more
Millimeter and submillimeter heterodyne spectroscopy offers the possibility of probing the mesosphere of Venus and monitoring minor species and winds. ALMA presents a unique opportunity to map mesospheric species of Venus. During Cycle 0, we have observed Venus on November 14 and 15, 2011, using the compact configuration of ALMA. The diameter of V…
Cloud structure and composition of Jupiter's troposphere from 5- µ m Cassini VIMS spectroscopy
Fletcher, L. N.; Irwin, P. G. J.; Giles, R. S.
Jupiter's tropospheric composition and cloud structure are studied using Cassini VIMS 4.5-5.1 µ m thermal emission spectra from the 2000-2001 flyby. We make use of both nadir and limb darkening observations on the planet's nightside, and compare these with dayside observations. Although there is significant spatial variability in the 5- &mic…
XMM-Newton Observations of SGR 1806-20 Over Seven Years Following the 2004 Giant Flare
Kouveliotou, C.; Kaspi, V. M.; Younes, G.
We report on the study of 14 XMM-Newton observations of the magnetar SGR 1806-20 spread over a period of 8 years, starting in 2003 and extending to 2011. We find that in mid 2005, a year and a half after a giant flare (GF), the torques on the star increased to the largest value yet seen, with a long term average rate between 2005 and 2011 of | \do…
Eskers in a complete, wet-based glacial system in the Phlegra Montes region, Mars
Balme, Matthew; Gallagher, Colman
Although glacial landsystems produced under warm/wet based conditions are very common on Earth, even here, observations of subglacial landforms such as eskers emerging from extant glaciers are rare. This paper describes a system of sinuous ridges emerging from the in situ but now degraded piedmont terminus of a Late Amazonian-aged (∼150 Ma) glacie…
Using FUV to IR Variability to Probe the Star-Disk Connection in the Transitional Disk of GM Aur
Sitko, Michael; Calvet, Nuria; Ingleby, Laura +3 more
We analyze three epochs of ultraviolet, optical, and near-infrared (NIR) observations of the Taurus transitional disk GM Aur using the Hubble Space Telescope Imaging Spectrograph (STIS) and the Infrared Telescope Facility SpeX spectrograph. Observations were separated by one week and three months in order to study variability over multiple timesca…
Brightest cluster galaxies in the extended GMRT radio halo cluster sample. Radio properties and cluster dynamics
Kale, R.; Giacintucci, S.; Venturi, T. +4 more
Aims: First-ranked galaxies in clusters, usually referred to as brightest cluster galaxies (BCGs), show exceptional properties over the whole electromagnetic spectrum. They are the most massive elliptical galaxies and show the highest probability to be radio loud. Moreover, their special location at the centres of galaxy clusters raises the q…
Dust-to-gas ratio, XCO factor and CO-dark gas in the Galactic anticentre: an observational study
Huang, Y.; Chen, B. -Q.; Xiang, M. -S. +2 more
We investigate the correlation between extinction and H I and CO emission at intermediate and high Galactic latitudes (|b| > 10°) within the footprint of the Xuyi Schmidt Telescope Photometric Survey of the Galactic anticentre (XSTPS-GAC) on small and large scales. In Paper I, we present a three-dimensional (3D) dust extinction map within the f…
Reapproaching the Spin Estimate of GX 339-4
Miller, J. M.; Cackett, E. M.; Ludlam, R. M.
We systematically reanalyze two previous observations of the black hole (BH) GX 339-4 in the very high and intermediate state taken with XMM-Newton and Suzaku. We utilize up-to-date data reduction procedures and implement the recently developed, self-consistent model for X-ray reflection and relativistic ray tracing, relxill. In the very high and …
Vertical propagation of planetary-scale waves in variable background winds in the upper cloud region of Venus
Futaana, Yoshifumi; Imamura, Takeshi; Kouyama, Toru +2 more
Recently it was found that the low-latitude zonal wind and the amplitudes of Kelvin and Rossby waves at the cloud top of Venus show long-term variations in a synchronized manner. For the purpose of explaining this synchronization, we investigated the influence of the background zonal wind profile on the upward propagation of Kelvin and Rossby wave…
The analysis of realistic stellar Gaia mock catalogues - I. Red clump stars as tracers of the central bar
Figueras, F.; Antoja, T.; Romero-Gómez, M. +2 more
In this first paper, we simulate the population of disc red clump stars to be observed by Gaia. We generate a set of test particles and we evolve it in a 3D barred Milky Way like galactic potential. We assign physical properties of the red clump trace population and a realistic 3D interstellar extinction model. We add Gaia observational constraint…