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Discovery of Strong Lensing by an Elliptical Galaxy at z = 0.0345
Tonry, John; Blakeslee, John P.; Lucey, John R. +1 more
We have discovered strong gravitational lensing by the galaxy ESO 325-G004, in images obtained with the Advanced Camera for Surveys on the Hubble Space Telescope. The lens galaxy is a boxy group-dominant elliptical at z=0.0345, making this the closest known galaxy-scale lensing system. The lensed object is very blue (B-IC~1.1), and form…
The European Large Area ISO Survey: optical identifications of 15-µm and 1.4-GHz sources in N1 and N2
Vaccari, M.; Serjeant, S.; Rowan-Robinson, M. +9 more
We present the multiwavelength properties and catalogue of the 15µm and 1.4GHz radio sources detected in the European Large Area ISO Survey (ELAIS) areas N1 and N2. Using the optical data from the Wide Field Survey we use a likelihood ratio method to search for the counterparts of the 1056 and 691 sources detected at 15µm and 1.4GHz, r…
VLA Observations of ζ Aurigae: Confirmation of the Slow Acceleration Wind Density Structure
Harper, Graham M.; Bennett, Philip D.; Brown, Alexander +3 more
Studies of the winds from single K and early M evolved stars indicate that these flows typically reach a significant fraction of their terminal velocity within the first couple of stellar radii. The most detailed spatially resolved information of the extended atmospheres of these spectral types comes from the ζ Aur eclipsing binaries. However, the…
All Coronal Loops Are the Same: Evidence to the Contrary
Schmelz, J. T.; Beene, J. E.; Nasraoui, K. +3 more
The 1998 April 20 spectral line data from the Coronal Diagnostic Spectrometer on the Solar and Heliospheric Observatory show a coronal loop on the solar limb. Our original analysis of these data showed that the plasma was multithermal, both along the length of the loop and along the line of sight. However, more recent results by other authors indi…
Magnetosheath variations during the storm main phase on 20 November 2003: Evidence for solar wind density control of energy transfer to the magnetosphere
Ebihara, Y.; Kataoka, R.; Sibeck, D. G. +4 more
Energy transfer from the solar wind into the magnetosphere and ionosphere is controlled by the southward magnetic field in the magnetosheath which under normal high Mach number conditions is about four times the solar wind southward field. In a low Mach number regime, however, the magnetosheath compression is diminished by a low solar wind density…
A Fresh View of Henize 2-10 with VLT NAOS-CONICA
Cabanac, Rémi A.; Vanzi, Leonardo; Sauvage, Marc
We present high-resolution observations of Henize 2-10 in Ks (2.2 µm), L' (3.8 µm), and M' (4.8 µm) bands. These allow us, for the first time, to track accurately the structures at the heart of the galaxy from the optical to the radio. All radio knots previously observed can now be associated with L'- and Ks…
The opacity of spiral galaxy disks. V. Dust opacity, HI distributions and sub-mm emission
Allen, Ronald J.; Holwerda, B. W.; van der Kruit, P. C. +1 more
The opacity of spiral galaxy disks, from counts of distant galaxies, is compared to HI column densities. The opacity measurements are calibrated using the "Synthetic Field Method" from González et al. (1998, ApJ, 506, 152), Holwerda et al. (2005a, AJ, 129, 1381). When compared for individual disks, the HI column density and dust opacity do not see…
Magnetosheath Interaction with the High Latitude Magnetopause
Khotyaintsev, Y.; Amata, E.; Fritz, T. A. +23 more
We present both statistical and case studies of magnetosheath interaction with the high-latitude magnetopause on the basis of Interball-1 and other ISTP spacecraft data. We discuss those data along with recently published results on the topology of cusp-magnetosheath transition and the roles of nonlinear disturbances in mass and energy transfer ac…
Outflows in the Orion Nebula: HH 540 from the Beehive Proplyd
Smith, Nathan; Bally, John; Walawender, Josh +1 more
We present Hubble Space Telescope Advanced Camera for Surveys images of the giant proplyd 181-826 in the southern Orion Nebula. This object exhibits a variety of known proplyd properties-an optically visible central star, a silhouette disk, a bright proplyd ionization front, and a bipolar microjet emerging along the disk axis that powers a larger …
The Halo, Hot Spots, and Jet/Cloud Interaction of PKS 2153-69
Young, A. J.; Heinz, S.; Wilson, A. S. +1 more
We report Chandra X-Ray Observatory and 1.4 GHz Australian Long Baseline Array (LBA) observations of the radio galaxy PKS 2153-69 and its environment. The Chandra image reveals a roughly spherical halo of hot gas extending out to 30 kpc around PKS 2153-69. Two depressions in the surface brightness of the X-ray halo correspond to the large-scale ra…