Search Publications
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…
Interannual and seasonal changes in the north polar ice deposits of Mars: Observations from MY 29-31 using MARCI
James, P. B.; Cantor, B. A.; Calvin, W. M. +1 more
The MARCI camera on the Mars Reconnaissance Orbiter provides daily synoptic coverage that allows monitoring of seasonal cap retreat and interannual changes that occur between Mars year (MY) and over the northern summer. The northern seasonal cap evolution was observed in MY 29, 30 and 31 (12/2007-04/2012). Observation over multiple Mars years allo…
Short-period X-ray oscillations in super-soft novae and persistent super-soft sources
Ness, J. -U.; Henze, M.; Wilms, J. +10 more
Context. Transient short-period (<100 s) oscillations have been found in the X-ray light curves of three novae during their super-soft source (SSS) phase and in one persistent SSS.
Aims: We pursue an observational approach to determine possible driving mechanisms and relations to fundamental system parameters such as the white dwarf mass. …
The Tip of the Red Giant Branch Distances to Type Ia Supernova Host Galaxies. III. NGC 4038/39 and NGC 5584
Lee, Myung Gyoon; Jang, In Sung
We present the tip of the red giant branch (TRGB) distances to Type Ia supernova (SNe Ia) host galaxies NGC 4038/39 and NGC 5584. Based on the deep images constructed using archival Hubble Space Telescope data, we detect red giant branch stars in each galaxy. VI photometry of the resolved stars and corresponding I-band luminosity functions show th…