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Near-Sun speed of CMEs and the magnetic nonpotentiality of their source active regions
Tiwari, Sanjiv K.; Winebarger, Amy R.; Venkatakrishnan, P. +3 more
We show that the speed of the fastest coronal mass ejections (CMEs) that an active region (AR) can produce can be predicted from a vector magnetogram of the AR. This is shown by logarithmic plots of CME speed (from the SOHO Large Angle and Spectrometric Coronagraph CME catalog) versus each of ten AR-integrated magnetic parameters (AR magnetic flux…
Visible light and ultraviolet observations of coronal structures: physical properties of an equatorial streamer and modelling of the F corona
Spadaro, D.; Dolei, S.; Ventura, R.
The present work studies the characteristics of an equatorial streamer visible above the east limb of the Sun on March 2008, during the most recent minimum of solar activity. We analysed the visible light coronagraphic images of SOHO/LASCO and the ultraviolet observations in the H I Lyα spectral line obtained by SOHO/UVCS, and exploited the Dopple…
Role of higher-dimensional evolving wormholes in the formation of a big rip singularity
Setare, M. R.; Sepehri, A.
We study the four-dimensional Universe on the M2-M5 BIon in the thermal background. The BIon is a configuration in a flat space of a D-brane and a parallel anti-D-brane connected by a wormhole. When the branes and antibranes are well separated and the brane's spike is far from the antibrane's spike, the wormhole cannot be formed. However, when two…
Fine and Superfine Structure of the Decameter-Hectometer Type II Burst on 7 June 2011
Panchenko, M.; Poedts, S.; Konovalenko, A. A. +4 more
The characteristics of a type II burst with a herringbone structure observed both with ground-based radio telescopes (UTR-2 and URAN-2) and space-borne spectrometers (STEREO-A and B) are discussed. The burst was recorded on 7 June 2011 in the frequency band 3 - 33 MHz. It was characterized by extremely rich fine structure. Statistical analysis of …
Differentiation signatures in the Flora region
Oszkiewicz, Dagmara; Włodarczyk, Ireneusz; Kankiewicz, Paweł +1 more
Context. Most asteroid families are very homogeneous in physical properties. Some show greater diversity, however. The Flora family is the most intriguing of them. The Flora family is spread widely in the inner main belt, has a rich collisional history, and is one of the most taxonomically diverse regions in the main belt. As a result of its proxi…
A Low-mass Main-sequence Star and Accretion Disk in the Very Faint X-Ray Transient M15 X-3
Heinke, C. O.; Cohn, H. N.; Lugger, P. M. +2 more
We present near-simultaneous {\text{}}{Chandra}/Hubble Space Telescope ({\text{}}{HST}) observations of the very faint (Lx < 1036 erg s-1) X-ray transient source M15 X-3, as well as unpublished archival {\text{}}{Chandra} observations of M15 X-3. The {\text{}}{Chandra} observations constrain the luminosity of M1…
The Swift X-Ray Telescope Cluster Survey. III. Cluster Catalog from 2005-2012 Archival Data
Giavalisco, Mauro; Rosati, Piero; Tozzi, Paolo +6 more
We present the Swift X-ray Cluster Survey (SWXCS) catalog obtained using archival data from the X-ray telescope (XRT) on board the Swift satellite acquired from 2005 February to 2012 November, extending the first release of the SWXCS. The catalog provides positions, soft fluxes, and, when possible, optical counterparts for a flux-limited sample of…
The effect of diamagnetic drift on motion of the dayside magnetopause reconnection line
Fear, R. C.; Marcucci, M. F.; Trenchi, L.
Magnetic reconnection at the magnetopause occurs with a large density asymmetry and for a large range of magnetic shears. In these conditions, a motion of the X line has been predicted in the direction of the electron diamagnetic drift. When this motion is super Alfvenic, reconnection should be suppressed. We analysed a large data set of Double St…
Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu
Yu, LiangLiang; Ji, Jianghui
In this work, we investigate the thermophysical properties of OSIRIS-REx target asteroid (101955) Bennu (hereafter Bennu), where thermal inertia plays an important role in understanding the nature of the asteroid's surface, and will definitely provide substantial information for the sampling return mission. Using a thermophysical model incorporati…
Possible evidence for Planck-scale resonant particle production during inflation from the CMB power spectrum
Mathews, G. J.; Gangopadhyay, M. R.; Ichiki, K. +1 more
The power spectrum of the cosmic microwave background from both the Planck and WMAP data exhibits a slight dip for multipoles in the range of l =10 - 30 . We show that such a dip could be the result of the resonant creation of massive particles that couple to the inflaton field. For our best-fit models, the epoch of resonant particle creation reen…