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The Thermal Evolution and Internal Structure of Saturn's Mid-Sized Icy Satellites

Sotin, Christophe; McKinnon, William B.; Matson, Dennis L. +2 more

The Cassini-Huygens mission is returning new geophysical data for the midsize, icy satellites of Saturn (i.e., satellites with radii between 100 and 1,000 km). These data have enabled a new generation of geophysical model studies for Phoebe, Iapetus, Rhea, Mimas, Tethys, Dione, as well as Enceladus (which is addressed in a separate chapter in this…

Lenticular Jointed Antenna Deployment Anomaly and Resolution Onboard the Mars Express Spacecraft

Adams, Douglas S.; Mobrem, Mehran

Discovery of Red-skewed K _α Iron Line in Cyg X-2 with Suzaku

Laurent, Philippe; Titarchuk, Lev; Shaposhnikov, Nikolai

We report on the Suzaku observation of neutron star (NS) low-mass X-ray binary Cygnus X-2 which reveals a presence of the iron K _α emission line. The line profile shows a significant red wing. This discovery increases the number of NS sources where red-skewed iron lines were observed and strongly suggests that this phenomenon is common …

Variable Stars in the Fornax dSph Galaxy. III. The Globular Cluster Fornax 5

Rest, Armin; Held, Enrico V.; Pritzl, Barton J. +8 more

We present a new study of the variable star population in globular cluster 5 of the Fornax dSph, based on B and V time series photometry obtained with the MagIC camera of the 6.5 m Magellan Clay telescope and complementary Hubble Space Telescope archive data. Light curves and accurate periodicities were obtained for 30 RR Lyrae stars and one SX Ph…

Hipparcos Calibration of the Tip of the Red Giant Branch

Bedding, Timothy R.; Tabur, Vello; Kiss, László L.

We have detected the tip of the red giant branch (TRGB) in the solar neighborhood using near-infrared photometry from the Two Micron All Sky Survey and DIRBE catalogs, and revised Hipparcos parallaxes. We confirm that the revised Hipparcos parallaxes are superior to the original ones, and that this improvement is necessary to detect the TRGB. We f…

Uncovering strong MgII absorbing galaxies. Imaging below the Lyman limit

Fynbo, J. P. U.; Christensen, L.; Petitjean, P. +2 more

Context: The nature of the galaxies that give rise to absorption lines, such as damped Lyman-α systems (DLAs) or strong Mg ii lines, in quasar spectra is difficult to investigate in emission. These galaxies can be very faint and located close to the lines of sight of the much brighter background quasars.
Aims: Taking advantage of the total abs…

A new perspective on the irregular satellites of Saturn - II. Dynamical and physical origin

Marzari, F.; Tosi, F.; Turrini, D.

The origin of the irregular satellites of the giant planets has been long debated since their discovery. Their dynamical features argue against an in situ formation suggesting that they are captured bodies, yet there is no global consensus on the physical process at the basis of their capture. In this paper, we explore the collisional capture scen…

Abundances in the planetary nebula NGC 6210

Pottasch, S. R.; Bernard-Salas, J.; Roellig, T. L.

The spectra of the planetary nebula NGC 6210 is reanalysed using spectral measurements made in the mid-infrared with the Spitzer Space Telescope and the Infrared Space Observatory. The aim is to determine the chemical composition of this object. We also make use of IUE and ground based spectra. Abundances determined from the mid…

Xmm-Newton X-Ray Detection of the High-Magnetic-Field Radio Pulsar PSR B1916+14

Zhu, Weiwei; Kaspi, Victoria M.; Gonzalez, Marjorie E. +1 more

Using observations made with the XMM-Newton Observatory, we report the first X-ray detection of the high-magnetic-field radio pulsar PSR B1916+14. We show that the X-ray spectrum of the pulsar can be well fitted with an absorbed blackbody with temperature in the range of 0.08-0.23 keV, or a neutron-star hydrogen atmosphere model with best-fit effe…

Multi-wavelength fine structure and mass flows in solar microflares

Veronig, A. M.; Sütterlin, P.; Rybák, J. +2 more

Aims: We study the multi-wavelength characteristics at high spatial resolution, as well as chromospheric evaporation signatures of solar microflares. To this end, we analyze the fine structure and mass flow dynamics in the chromosphere, transition region and corona of three homologous microflares (GOES class <A9/0.7 with/without background), wh…