Search Publications
Macrospicules and blinkers as seen in Shutterless EIT 304 Å
Doyle, J. G.; Madjarska, M. S.; Hochedez, J. -F. +1 more
Aims.Small-scale transient phenomena in the solar atmosphere are believed to play a crucial role in the coronal heating and solar wind generation. This study aims at providing new observational evidence on blinkers and macrospicules appearance in imager data and in doing so, establish the long disputed relationship between these phenomena.
Met…
Effervescent heating: constraints from nearby cooling flow clusters observed with XMM-Newton
Kaastra, J. S.; Piffaretti, R.
Aims.We have used deprojected radial density and temperature profiles of a sample of 16 nearby CF clusters observed with XMM-Newton to test whether the effervescent heating model can satisfactorily explain the dynamics of CF clusters.
Methods.For each cluster we derived the required extra heating as a function of cluster-centric distance for va…
The weak INTEGRAL bursts GRB 040223 and GRB 040624 : an emerging population of dark afterglows
Covino, S.; D'Avanzo, P.; Campana, S. +18 more
We report here γ-ray, X-ray and near-infrared observations of
Short-term changes in the belt/zone structure of Saturn's Southern Hemisphere (1996-2004)
Sánchez-Lavega, A.; Pérez-Hoyos, S.; French, R. G.
Aims.The main goal of this paper is to study the reflectivity changes that affect Saturn's global belt/zone pattern on time-scales from weeks to a few months, and to determine their frequency and intensity, as well as the variations of the vertical cloud structure that cause such changes.
Methods: .We have used 177 images from Hubble Space Tel…
The dark clump near Abell 1942: dark matter halo or statistical fluke?
Castander, F. J.; von der Linden, A.; Schneider, P. +1 more
Using HST WFPC2 mosaic imaging, deep Chandra observations, and the
original CFHT imaging, we investigate the case for the dark clump candidate originally presented by (Erben et al. 2000, A&A, 355, 23). We show that the original detection is well reproducible in the CFHT data, and can confirm the presence of an alignment signal at the dark…EIT and TRACE responses to flare plasma
Mason, H. E.; Del Zanna, G.; Tripathi, D. +1 more
Aims.To understand the contribution of active region and flare plasmas to the λ195 channels of SOHO/EIT (Extreme-ultraviolet Imaging Telescope) and TRACE (Transition Region and Coronal Explorer).
Methods: .We have analysed an M8 flare simultaneously observed by the Coronal Diagnostic Spectrometer (CDS), EIT, TRACE and RHESSI. We obtained synth…
First broad band study of the mysterious source 1E 1743.1-2843
Sidoli, L.; Ubertini, P.; Bazzano, A. +4 more
Context: .In the last years, the persistent source 1E 1743.1-2843 has been observed in the X-rays, but never above 20 keV. In previous works, it was stressed that a possible high energy emission could give further indications on the accreting object nature which remains still unknown.
Aims: .We present here more than two years of 1E 1743.1-284…
Neoclassical bootstrap current in solar plasma loops
Huang, G. -L.; Tan, B. -L.
From the similarities in magnetic configurations and plasma behaviors between tokamaks and solar current-carrying plasma loops, we apply the theory of neoclassical bootstrap current in tokamaks to the solar plasma loops. We present a simplified expression of the bootstrap current in the solar plasma loops and find that there may be a considerable …
The magnetic Bp star 36 Lyncis. II. A spectroscopic analysis of its co-rotating disk
Smith, M. A.; Wade, G. A.; Bohlender, D. A. +1 more
We report on the physical properties of the disk-like structure of B8 IIIp star 36 Lyncis from line syntheses of phase-resolved, high resolution spectra obtained from the International Ultraviolet Explorer archives and from newly obtained ground-based spectra of the Hα absorption profile. This disk is highly inclined to the rotational axis and bet…
A prominent relativistic iron line in the Seyfert 1 MCG-02-14-009
Porquet, D.
I report the discovery of a prominent broad and asymmetrical feature near 6.4 keV in the Seyfert 1