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Plasmoids in reconnecting current sheets: Solar and terrestrial contexts compared
Farrugia, C. J.; Cranmer, S. R.; Lin, J.
Magnetic reconnection plays a crucial role in violent energy conversion occurring in the environments of high electrical conductivity, such as the solar atmosphere, magnetosphere, and fusion devices. We focus on the morphological features of the process in two different environments, the solar atmosphere and the geomagnetic tail. In addition to in…
CAWSES November 7-8, 2004, superstorm: Complex solar and interplanetary features in the post-solar maximum phase
Tsurutani, Bruce T.; Echer, Ezequiel; Guarnieri, Fernando L. +1 more
The complex interplanetary structures during 7 to 8 Nov 2004 are analyzed to identify their properties as well as resultant geomagnetic effects and the solar origins. Three fast forward shocks, three directional discontinuities and two reverse waves were detected and analyzed in detail. The three fast forward shocks ``pump'' up the interplanetary …
Characterization of mesoscale gravity waves in the upper and lower clouds of Venus from VEX-VIRTIS images
Hueso, R.; Sánchez-Lavega, A.; Drossart, P. +3 more
Images obtained from the Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS)-M instrument onboard Venus Express present visible trains of alternating bands of cloud brightness in two different layers: at the upper cloud tops (~66 km altitude) observed in the dayside hemisphere using reflected ultraviolet light (380 nm) and in the lower clou…
On the evidence for narrow, relativistically shifted X-ray lines
Vaughan, S.; Uttley, P.
In recent years, there have been many reported detections of highly redshifted or blueshifted narrow spectral lines (both emission or absorption) in the X-ray spectra of active galaxies, but these are all modest detections in terms of their statistical significance. The aim of this paper is to review the issue of the significance of these detectio…
The (Re-)Discovery of G350.1-0.3: A Young, Luminous Supernova Remnant and Its Neutron Star
Camilo, F.; Miller, J. M.; Gaensler, B. M. +6 more
We present an XMM-Newton observation of the long-overlooked radio source G350.1-0.3. The X-ray spectrum of G350.1-0.3 can be fit by a shocked plasma with two components: a high-temperature (1.5 keV) region with a low ionization timescale and enhanced abundances, plus a cooler (0.36 keV) component in ionization equilibrium and with solar abundances…
Integral field near-infrared spectroscopy of II Zw 40
Cresci, G.; Vanzi, L.; Melnick, J. +1 more
We present integral field spectroscopy in the near-infrared of the nearby starburst galaxy II Zw 40. Our new observations provide an unprecedented detailed view of the interstellar medium and star formation of this galaxy. The radiation emitted by the galaxy is dominated by a giant HII region, which extends over an area of more than 400 pc in size…
Color Profiles of Disk Galaxies since z ~ 1: Probing Outer Disk Formation Scenarios
Beckman, J. E.; Trujillo, I.; Azzollini, R.
We present deep color profiles for a sample of 415 disk galaxies within the redshift range 0.1 < z <= 1.1, and contained in HST ACS imaging of the GOODS-South field. For each galaxy, passband combinations are chosen to obtain, at each redshift, the best possible approximation to the rest-frame u - g color. We find that objects which show a t…
Spectral irradiance variations: comparison between observations and the SATIRE model on solar rotation time scales
Solanki, S. K.; Krivova, N. A.; Kopp, G. +2 more
Aims: We test the reliability of the observed and calculated spectral irradiance variations between 200 and 1600 nm over a time span of three solar rotations in 2004.
Methods: We compare our model calculations to spectral irradiance observations taken with SORCE/SIM, SoHO/VIRGO, and UARS/SUSIM. The calculations assume LTE and are based on the …
GRB 070201: A Possible Soft Gamma-Ray Repeater in M31
Cenko, S. B.; Stiele, H.; Pietsch, W. +13 more
GRB 070201 was a bright, short-duration, hard-spectrum gamma-ray burst detected by the Interplanetary Network. Its error quadrilateral, which has an area of 0.124 deg2, intersects some prominent spiral arms of the nearby M31 (Andromeda) galaxy. Given the properties of this GRB, along with the fact that LIGO data argue against a compact …
A Multi-Epoch HST Study of the Herbig-Haro Flow from XZ Tauri
Krist, John E.; Hester, J. Jeff; Stapelfeldt, Karl R. +3 more
We present nine epochs of Hubble Space Telescope optical imaging of the bipolar outflow from the pre-main-sequence binary XZ Tauri. Our data monitor the system from 1995 to 2005 and include emission line images of the flow. The northern lobe appears to be a succession of bubbles, the outermost of which expanded ballistically from 1995 to 1999 but …