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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…
Luminosity function of low-mass X-ray binaries in the globular cluster system of NGC 1399
Maccarone, T. J.; Paolillo, M.; Fabbiano, G. +5 more
Aims: We present a study of the faint end of the X-ray luminosity function (XLF) of low-mass X-ray binaries (LMXBs) in the Globular Cluster (GC) system of the cD galaxy
Methods: We performed a stacking experiment on 618 X-ray undetected GCs, in order to verify the presence of faint LMXBs and to constrain the …
Searching for Debris Disks around Seven Radio Pulsars
Kaplan, David L.; Li, Aigen; Wang, Zhongxiang +2 more
We report on our searches for debris disks around seven relatively nearby radio pulsars, which are isolated sources that were carefully selected as targets on the basis of our deep Ks -band imaging survey. The Ks images obtained with the 6.5 m Baade Magellan Telescope at Las Campanas Observatory are analyzed together with the…