Search Publications
Physical Properties of a Pilot Sample of Spectroscopic Close Pair Galaxies at z ~ 2
Shapley, Alice E.; Steidel, Charles C.; Law, David R. +1 more
We use Hubble Space Telescope Wide-field Camera 3 rest-frame optical imaging to select a pilot sample of star-forming galaxies in the redshift range z = 2.00-2.65 whose multi-component morphologies are consistent with expectations for major mergers. We follow up this sample of major merger candidates with Keck/NIRSPEC long-slit spectroscopy obtain…
Hot Gaseous Stellar Disks Avoid Regions of Low Interstellar Densities
Abt, Helmut A.
Towards the automated geomorphometric extraction of talus slopes in Martian landscapes
Podobnikar, Tomaž; Székely, Balázs
Terrestrial talus slopes are a common feature of mountainous environments. Their geomorphic form is determined by their being constituted of scree, or similar loose and often poorly sorted material. Martian talus slopes are governed by the different nature of the Martian environment, namely: weaker gravity, the wide availability of loose material,…
Thermal transport in Saturn's B ring inferred from Cassini CIRS
Altobelli, Nicolas; Showalter, Mark; Pilorz, Stuart +1 more
We examine the heat budget of Saturn's B ring using all of the data from Cassini's Composite Infra Red Spectrometer (CIRS) taken during one Saturn season, together with a detailed numerical calculation of the incident flux. We find that at all times 30-40% of the energy incident on the sunlit side finds its way through the ring to be emitted on th…
Herschel Hi-GAL imaging of massive young stellar objects
Pezzuto, S.; de Wit, W. -J.; Molinari, S. +5 more
We used Herschel Hi-GAL (Herschel infrared Galactic Plane survey) data to determine whether massive young stellar objects (MYSOs) are resolved at 70 µm and to study their envelope density distribution. Our analysis of three relatively isolated sources in the l = 30° and 59° Galactic fields show that the objects are partially resolved at 70 &…
Ten years of INTEGRAL observations of the hard X-ray emission from SGR 1900+14
Götz, D.; Mereghetti, S.; Santangelo, A. +1 more
We exploited the high sensitivity of the INTEGRAL IBIS/ISGRI instrument to study the persistent hard X-ray emission of the soft gamma-ray repeater SGR 1900+14, based on ~11.6 Ms of archival data. The 22-150 keV INTEGRAL spectrum can be well fitted by a power law with photon index 1.9 ± 0.3 and flux Fx = (1.11 ± 0.17) × 10-11 …
An X-ray characterization of the central region of the supernova remnant G332.5-5.6
Miceli, M.; Combi, J. A.; García, F. +3 more
Aims: We present an X-ray analysis of the central region of supernova remnant (SNR) G332.5-5.6 through an exhaustive analysis of XMM-Netwon observations with complementary infrared observations. We characterize and discuss the origin of the observed X-ray morphology, which presents a peculiar plane edge over the west side of the central regio…
Galactic coordinate system based on multi-wavelength catalogs
Zhu, Zi; Liu, Jia-Cheng; Ding, Ping-Jie
The currently used Galactic coordinate system (GalCS) is based on the FK5 system at J2000.0, which was transformed from the FK4 system at B1950.0. The limitations and misunderstandings related to this transformed GalCS can be avoided by defining a new GalCS that is directly connected to the International Celestial Reference System (ICRS). With mor…
A study of iron and dust in the supernova remnant IC 443
Onaka, Takashi; Lee, Ho-Gyu; Kaneda, Hidehiro +3 more
We performed near-infrared line mapping of the supernova remnant IC 443 with the IRSF 1.4-m telescope, using the narrow-band filters tuned for [Fe II] 1.257 µm, [Fe II] 1.644 µm, and Paβ. We detected the [Fe II] and Paβ emissions from a very wide area of the observed region (30‧ ×35‧). These line intensity maps re…
Improved SOT (Hinode mission) high resolution solar imaging observations
Koutchmy, S.; Adjabshirizadeh, A.; Goodarzi, H.
We consider the best today available observations of the Sun free of turbulent Earth atmospheric effects, taken with the Solar Optical Telescope (SOT) onboard the Hinode spacecraft. Both the instrumental smearing and the observed stray light are analyzed in order to improve the resolution. The Point Spread Function (PSF) corresponding to the blue …