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Broadband Metric-Range Radio Emission Associated with a Moreton/EIT Wave
Magdalenić, J.; Temmer, M.; Mann, G. +5 more
We present the evolution and kinematics of a broadband radio source that propagated collaterally with an Hα/EIT wave, linking it with the type II burst that was excited higher up in the corona. The NRH wave emission extended from the frequency f~327 to f<151 MHz and was considerably weaker than the flare-related type IV burst. The emission cent…
Batch discovery of nine z~ 1 clusters using X-ray and K or R, z' images
Altieri, B.; Valtchanov, I.; Pierre, M. +5 more
We present the results of an initial search for clusters of galaxies at z~ 1 and above, using data from 2.9 square degrees of XMM-Newton images. By selecting weak potentially extended X-ray sources with faint or no identifications in deep, ground-based optical imaging, we have constructed a starting sample of 19 high-redshift cluster candidates. N…
On metal-deficient barium stars and their link with yellow symbiotic stars
Jorissen, A.; Udry, S.; Musaev, F. A. +2 more
This paper addresses the question of why metal-deficient barium stars are not yellow symbiotic stars (YSyS). Samples of (suspected) metal-deficient barium (mdBa) stars and YSyS have been collected from the literature, and their properties reviewed. It appears in particular that the barium nature of the suspected mdBa stars needs to be ascertained …
The Saturnian plasma sheet as revealed by energetic particle measurements
Livi, S.; Krupp, N.; Woch, J. +9 more
Since July 2004 Cassini is in orbit around Saturn providing in-situ measurements of the Saturnian magnetosphere. One of the three sensors of the Magnetospheric Imaging Instrument (MIMI) is the Low Energy Magnetospheric Measurement System (LEMMS) that responds to energetic particles which can serve as indicators of key regions (Krimigis et al., 200…
Detailed Spectral Analysis of the 260 ks XMM-Newton Data of 1E 1207.4-5209 and Significance of a 2.1 keV Absorption Feature
Hailey, Charles J.; Mori, Kaya; Chonko, James C.
We have reanalyzed the 260 ks XMM-Newton observation of 1E 1207.4-5209. There are several significant improvements over previous work. First, a much broader range of physically plausible spectral models was used. Second, we have used a more rigorous statistical analysis. The standard F-distribution was not employed, but rather the exact finite sta…
Sequential Chromospheric Brightenings beneath a Transequatorial Halo Coronal Mass Ejection
Thompson, B. J.; Balasubramaniam, K. S.; Pevtsov, A. A. +5 more
Analyses of multiwavelength data sets for a solar eruption at ~21:30 UT on 2002 December 19 show evidence for the disappearance of a large-scale, transequatorial coronal loop (TL). In addition, coronal manifestations of the eruption (based on SOHO EIT and LASCO images) include large-scale coronal dimming, flares in each associated active region in…
INTEGRAL detection of a long powerful burst from SLX 1735-269
Sunyaev, R.; Revnivtsev, M.; Lutovinov, A. +1 more
We present results of an analysis of the bursting behavior of the low mass X-ray binary system SLX 1735-269 during INTEGRAL observations of the Galactic Center region in 2003. Six type-I X-ray bursts were detected in total with one being much longer and more powerful then the others. A strong dependence of the burst recurrence time on the mass acc…
Interstellar Ca II Line Intensities and the Distances of the OB stars
Galazutdinov, G. A.; Han, Inwoo; Strobel, A. +4 more
We show that the equivalent widths of the well-known interstellar Ca II H and K lines can be used to determine the distances to OB stars in our Galaxy. The equivalent widths, measured in the spectra of 147 early-type stars, are strongly related to the Hipparcos parallaxes of those objects. The lines fitted to the parallax-equivalent width data are…
Effect of the H I Lyα Chromospheric Flux Anisotropy on the Total Intensity of the Resonantly Scattered Coronal Radiation
Auchère, F.
In modeling of the resonantly scattered solar coronal Lyα line of H I, the intensity of the chromospheric source is often assumed to be uniform. We investigate the validity of this assumption. After establishing a correlation between the H I 121.6 nm and He II 30.4 nm line intensities, we build Carrington maps of the Lyα chromosphere from SOHO EUV…
Solar limb faculae
Hirzberger, J.; Wiehr, E.
We observe solar limb faculae at an unprecedented spatial resolution with the new 1 m Swedish Solar Telescope SST on La Palma. Speckle-reconstructed images are used to study 4475 limb facular grains simultaneously in the 430 nm G-band and the 587.5±1.5 continuum up to only 1'' from the limb (cos θ=0.05). No systematic contrast decrease is found ev…