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An indirect measurement of gas evolution in galaxies at 0.5 < z < 2.0
Popping, G.; Caputi, K. I.; Trager, S. C. +1 more
One key piece of information missing from high-redshift galaxy surveys is the galaxies' cold gas contents. We present a new method to indirectly determine cold gas surface densities and integrated gas masses from galaxy star formation rates and to separate the atomic and molecular gas components. Our predicted molecular and total gas surface densi…
Cassini in Titan's tail: CAPS observations of plasma escape
Lewis, G. R.; Coates, A. J.; Thomsen, M. F. +10 more
We present observations of CAPS electron and ion spectra during Titan distant tail crossings at 5,000-10,000 km altitude by the Cassini spacecraft. In common with closer tail encounters, we identify ionospheric plasma in the tail. Some of the electron spectra indicate a direct magnetic connection to Titan's dayside ionosphere due to the presence o…
General circulation and transport in Saturn's upper troposphere and stratosphere
Moses, Julianne I.; Friedson, A. James
We present a model for the general circulation and dynamical transport in Saturn's upper troposphere and stratosphere and derive the effective advective circulation and eddy transport coefficients required for use in two-dimensional (latitude-altitude) photochemistry-transport models. A three-dimensional Outer-Planet General Circulation Model (OPG…
A universal stellar mass-size relation of galaxies in the GOODS-North region
Kajisawa, Masaru; Ichikawa, Takashi; Akhlaghi, Mohammad
We present scaling relations between the stellar mass (M*) and size of galaxies at 0.3 < z < 3 for half-light (R50) and 90 per cent-light (R90) radii, using a deep K-band-selected catalogue taken with the Subaru Telescope and Multi-Object Infrared Camera and Spectrograph (MOIRCS) in the Great Observatories Or…
Detecting and modelling the magnetic field of the β Cephei star V 2052 Ophiuchi
Thizy, O.; Frémat, Y.; Neiner, C. +5 more
Aims: Following the indirect detection of a magnetic field in the β Cephei star
The morphology of Saturn's ultraviolet aurora
Carbary, J. F.
Spectrographic images in the far ultraviolet, obtained from observations made from 2007 to 2009, are used to quantify and compare the morphology of Saturn's northern and southern aurora in local time. Made by the UVIS imager on the Cassini spacecraft, these observations differ from previous UV observations of Saturn's aurora by offering complete l…
BeppoSAX Observations of the X-Ray Pulsar MAXI J1409-619 in Low State: Discovery of Cyclotron Resonance Features
Sidoli, Lara; Masetti, Nicola; Frontera, Filippo +2 more
The transient 500 s X-ray pulsar MAXI J1409-619 was discovered by the slit cameras aboard Monitor of All-sky X-ray Image (MAXI) on 2010 October 17, and soon after accurately localized by Swift. We found that the source position was serendipitously observed in 2000 during BeppoSAX observations of the Galactic plane. Two sources are clearly detected…
Detection of exospheric O2+ at Saturn's moon Dione
Coates, A. J.; Thomsen, M. F.; Wilson, R. J. +6 more
During a close pass of Cassini through the plasma wake of Saturn's moon Dione on April 7, 2010 the Cassini Plasma Spectrometer (CAPS) detected molecular oxygen ions (O2+) on pick up ring velocity distributions, thus providing the first in situ detection of a neutral exosphere surrounding the icy moon. The density of O2
The magnetized medium around the radio galaxy B2 0755+37: an interaction with the intragroup gas
Guidetti, D.; Croston, J. H.; Parma, P. +2 more
We explore the magnetoionic environment of the isolated radio galaxy B2 0755+37 using detailed imaging of the distributions of Faraday rotation and depolarization over the radio source from Very Large Array observations at 1385, 1465 and 4860 MHz and new X-ray data from XMM-Newton. The rotation measure (RM) distribution is complex, with evidence f…
The Nature of Starbursts. III. The Spatial Distribution of Star Formation
McQuinn, Kristen B. W.; Cannon, John M.; Dolphin, Andrew E. +5 more
We map the spatial distribution of recent star formation over a few × 100 Myr timescales in 15 starburst dwarf galaxies using the location of young blue helium burning stars identified from optically resolved stellar populations in archival Hubble Space Telescope observations. By comparing the star formation histories from both the high surface br…