Search Publications
The Collimated Wind in NGC 253
Sugai, H.; Davies, R. I.; Ward, M. J.
Near-infrared Fabry-Perot imaging has revealed H2 emission extended to about 130 pc from the disk of NGC 253. It is closely related to the hot plasma observed in soft X-rays: filamentary H2 features are found at the edges of the hot plasma. These are the places of direct interaction between a superwind and its surrounding mol…
Variation of coronal line widths on and off the disk
Poedts, S.; Banerjee, D.; O'Shea, E.
We present observations of a Mg X 625 Å coronal line, obtained with the CDS instrument on SoHO, extending from the disk part of the coronal hole to ~ 90 000 km above the limb in the north polar coronal hole. Observations were performed in polar plumes and inter-plume lanes. To obtain a sufficiently high signal-to-noise ratio the observations were …
Cassini RADAR: prospects for Titan surface investigations using the microwave radiometer
Lorenz, Ralph D.; West, Richard D.; Janssen, Michael A. +3 more
The Radar instrument on the Cassini spacecraft can be used in a passive radiometric mode to map the microwave emission from Titan: these will be the first resolved microwave emission measurements of an icy satellite. Observation plans and the theory for their interpretation is presented: these data should be able to provide crude composition maps …
Constraints on the Cluster Environments and Hot Spot Magnetic Field Strengths of the Radio Sources 3C 280 and 3C 254
Donahue, Megan; Daly, Ruth A.; Horner, Donald J.
We present new Chandra Observatory observations together with archival Hubble Space Telescope (HST) and radio observations of 3C 254, a radio quasar at z=0.734, and 3C 280, a radio galaxy at z=0.996. We report the detection of X-ray and possible HST optical counterparts to the radio hot spots in 3C 280 and the detection of an X-ray counterpart to …
XMM-Newton RGS spectroscopy of LMC X-3
Page, M. J.; Soria, R.; Mason, K. O. +3 more
We present soft X-ray spectroscopy of the black hole binary LMC X-3 from the XMM-Newton Reflection Grating Spectrometer. The observations span the full range of spectral states seen in LMC X-3. The spectra are completely dominated by continuum emission, and the neutral absorbing column measured from the OI edge (NH= 3.8+0.8
XMM-Newton study of hard X-ray sources in IC 443
Bocchino, F.; Bykov, A. M.
We present XMM-Newton observations of hard X-ray emission from the field of IC 443, a supernova remnant interacting with a molecular cloud. The hard emission from the field is dominated by 12 isolated sources having 2-10 keV flux {ga } 10-14 erg cm-2 s-1. Only a fraction of the sources are expected to be extragalac…
Mass Motions and Plasma Properties in the 107 K Flare Solar Corona
Curdt, W.; Innes, D. E.; Landi, E. +1 more
In the present work, we analyze Solar Ultraviolet Measurement of Emitted Radiation (SUMER) observations of a solar limb flare that occurred on 1999 May 9. The analyzed data cover a time span of around 6.4 hr, during which an M-7.6 flare erupted and decayed in the field of view. Two selected regions along the SUMER slit have been considered for qua…
Effects of plasma sheet variability on the fast initial ring current decay
Thomsen, M. F.; Kistler, L. M.; Mouikis, C. G. +1 more
We study the effects of plasma sheet variations on the fast initial ring current (RC) decay during the March 31, 2001 storm. Previous studies have focused on the effects of enhanced plasma sheet density on RC buildup during the main phase of the storms. Using model simulations and energetic particle data from the instruments on CLUSTER and LANL, w…
Gas-phase CO2, C2H2, and HCN toward Orion-KL
van Dishoeck, E. F.; Wright, C. M.; Lahuis, F. +3 more
The infrared spectra toward Orion-IRc2, Peak 1 and Peak 2 in the 13.5-15.5 mu m wavelength range are presented, obtained with the Short Wavelength Spectrometer on board the Infrared Space Observatory. The spectra show absorption and emission features of the vibration-rotation bands of gas-phase CO2, HCN, and C2H2, …
Discovery of Radio/X-Ray/Optical-resolved Supernova Remnants in the Center of the Andromeda Galaxy
Kong, A. K. H.; Garcia, M. R.; Williams, B. F. +2 more
We have detected a spatially resolved supernova remnant (SNR) in the center of the Andromeda galaxy, in radio, X-ray, and optical wavelengths. These observations provide the highest spatial resolution imaging of a radio/X-ray/optical SNR in that galaxy to date. The multiwavelength morphology, radio spectral index, X-ray colors, and narrowband opti…