Search Publications
Cold Water Vapor in the Barnard 5 Molecular Cloud
Persson, C. M.; Charnley, S. B.; Takakuwa, S. +3 more
After more than 30 yr of investigations, the nature of gas-grain interactions at low temperatures remains an unresolved issue in astrochemistry. Water ice is the dominant ice found in cold molecular clouds; however, there is only one region where cold (~10 K) water vapor has been detected—L1544. This study aims to shed light on ice desorption mech…
The far magnetotail response to an interplanetary shock arrival
Němeček, Z.; Šafránková, J.; Přech, L. +2 more
We present a study of the impact of the December 7, 2003 fast forward interplanetary (IP) shock on the distant tail of the Earth's magnetosphere. Using the data from the several spacecraft located in the solar wind/magnetosheath upstream to the Earth, we monitor a propagation of the IP shock from the L1 point to the magnetosphere. A behavior of th…
Characterizing SL2S galaxy groups using the Einstein radius
Blakeslee, J. P.; Cabanac, R.; Fernández-Trincado, J. G. +11 more
Aims: We aim to study the reliability of RA (the distance from the arcs to the center of the lens) as a measure of the Einstein radius in galaxy groups. In addition, we want to analyze the possibility of using RA as a proxy to characterize some properties of galaxy groups, such as luminosity (L) and richness (N).
Me…
Searching for a gas cloud surrounding the WASP-18 planetary system
Fossati, L.; Kochukhov, O.; Bohlender, D. +5 more
Near-UV (NUV) Hubble Space Telescope (HST) observations of the extreme hot-Jupiter WASP-12b revealed the presence of diffuse exospheric gas extending beyond the planet's Roche lobe. Furthermore the NUV observations showed a complete lack of the normally bright core emission of the Mg II h&k resonance lines, in agreement with the measured anomalous…
XMM-Newton observation of the interacting galaxies NGC 1512 and NGC 1510
Ducci, L.; Kavanagh, P. J.; Sasaki, M. +1 more
Context. The galaxy NGC 1512 is interacting with the smaller galaxy NGC 1510 and shows a peculiar morphology, characterised by two extended arms immersed in an HI disc whose size is about four times larger than the optical diameter of NGC 1512.
Aims: For the first time we performed a deep X-ray observation of the galaxies NGC 1512 and NGC 151…
Multifrequency analysis of the Jovian electron-belt radiation during the Cassini flyby of Jupiter
Sault, R. J.; Janssen, M. A.; Bolton, S. J. +3 more
Aims: We examine Very Large Array (VLA) observations of Jupiter to present evidence of fluctuations in the emission produced by the electron belt in January 2001. Investigating the source of fluctuations will provide new opportunities to discuss the scenarios of temporal changes in Jupiter's synchrotron radiation (i.e., the electron belt) in …
Selection and Mid-infrared Spectroscopy of Ultraluminous Star-forming Galaxies at z ~ 2
Fang, Guanwen; Kong, Xu; Willner, S. P. +4 more
Starting from a sample of 24 µm sources in the Extended Groth Strip, we use 3.6-8 µm color criteria to select ultraluminous infrared galaxies (ULIRGs) at z ~ 2. Spectroscopy from 20-38 µm of 14 objects verifies their nature and gives their redshifts. Multi-wavelength data for these objects imply stellar masses >1011…
Identification Campaign of Supernova Remnant Candidates in the Milky Way. II. X-Ray Studies of G38.7-1.4
Kong, A. K. H.; Hui, C. Y.; Wu, J. H. K. +3 more
We report on XMM-Newton and Chandra observations of the Galactic supernova remnant candidate G38.7-1.4, together with complementary radio, infrared, and γ-ray data. An approximately elliptical X-ray structure is found to be well correlated with a radio shell as seen by the Very Large Array. The X-ray spectrum of G38.7-1.4 can be well described by …
The Impact of a Filament Eruption on Nearby High-lying Cool Loops
Long, D. M.; De Pontieu, B.; Doschek, G. A. +2 more
The first spectroscopic observations of cool Mg II loops above the solar limb observed by NASA's Interface Region Imaging Spectrograph (IRIS) are presented. During the observation period, IRIS is pointed off-limb, allowing the observation of high-lying loops, which reach over 70 Mm in height. Low-lying cool loops were observed by the IRIS slit-jaw…
An estimate of the dust pickup current at Enceladus
Gurnett, D. A.; Kurth, W. S.; Wahlund, J. -E. +3 more
We demonstrate that the acceleration of submicron dust originating at Enceladus by a reduced co-rotating E-field is capable of creating a dust pickup current perpendicular to the magnetic field with values ranging from 3 to 15 kA (depending upon the effective grain charge). Such a current represents a new contribution to the total pickup current i…