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Are 3-D coronal mass ejection parameters from single-view observations consistent with multiview ones?
Moon, Y. -J.; Jang, Soojeong; Lee, Harim +2 more
To prepare for when only single-view observations are available, we have made a test whether the 3-D parameters (radial velocity, angular width, and source location) of halo coronal mass ejections (HCMEs) from single-view observations are consistent with those from multiview observations. For this test, we select 44 HCMEs from December 2010 to Jun…
Ionization balance in Titan's nightside ionosphere
Coates, A. J.; Wahlund, J. -E.; Edberg, N. J. T. +10 more
Based on a multi-instrumental Cassini dataset we make model versus observation comparisons of plasma number densities, nP = (nenI)1/2 (ne and nI being the electron number density and total positive ion number density, respectively) and short-lived ion number densities (N+…
X-Ray Emission from J1446--4701, J1311--3430, and Other Black Widow Pulsars
Pavlov, George G.; Garmire, Gordon P.; Arumugasamy, Prakash
We present the results of detailed X-ray analysis of two black-widow pulsars (BWPs), J1446-4701 and J1311-3430. PSR J1446-4701 is a BWP with orbital parameters near the median values of the sample of known BWPs. Its X-ray emission that was detected by XMM-Newton is well characterized by a soft power-law (PL) spectrum (photon index Γ ≈ 3), and it s…
VEGAS-SSS. A VST early-type galaxy survey: analysis of small stellar systems. Testing the methodology on the globular cluster system in NGC 3115
Forbes, Duncan A.; Romanowsky, Aaron J.; Puzia, Thomas H. +11 more
We present a study of globular clusters (GCs) and other small stellar systems (SSSs) in the field of NGC 3115, observed as part of the ongoing wide-field imaging survey VEGAS, carried out with the 2.6 m VST telescope. We used deep g and i observations of NGC 3115, a well-studied lenticular galaxy that is covered excellently well in the scientific …
Photometric analysis of Asteroid (21) Lutetia from Rosetta-OSIRIS images
Vincent, J. -B.; Masoumzadeh, N.; Li, Jian-Yang +1 more
We analyzed the photometric properties of Asteroid (21) Lutetia based on images captured by Rosetta during its flyby. We utilized the images recorded in the F17 filter (λ = 631.6 nm) of the Wide Angle Camera (WAC) and in the F82 & F22 filters (λ = 649.2 nm) of the Narrow Angle Camera (NAC) of the OSIRIS imaging system onboard the spacecraft. W…
Gas phase dicyanoacetylene (C4N2) on Titan: New experimental and theoretical spectroscopy results applied to Cassini CIRS data
Jolly, A.; Cottini, V.; Irwin, P. +6 more
Dicyanoacetylene has not been observed so far in the gas phase in Titan's atmosphere but this molecule is still on the list of the detected species, on the basis of the correspondence between a solid phase feature measured at 478 cm-1 in the laboratory and a spectral feature observed by Voyager. In this work, the infrared spectrum of ga…
CMB low multipole alignments in the ΛCDM and dipolar models
Gruppuso, A.; Natoli, P.; Polastri, L.
The dipolar model [1] has attracted much interest because it may phenomenologically explain the CMB hemispherical power asymmetry found in the WMAP and Planck data. Since such a model explicitly breaks isotropy at large angular scales it is natural to wonder whether it can also explain other CMB directional anomalies. Focusing on the low ℓ alignme…
Observation and numerical modeling of chromospheric evaporation during the impulsive phase of a solar flare
Watanabe, Tetsuya; Murakami, Izumi; Imada, Shinsuke
We have studied the chromospheric evaporation flow during the impulsive phase of the flare by using the Hinode/EUV Imaging Spectrometer observation and 1D hydrodynamic numerical simulation coupled to the time-dependent ionization. The observation clearly shows that the strong redshift can be observed at the base of the flaring loop only during the…
Searches for Millisecond Pulsar Candidates among the Unidentified Fermi Objects
Cheng, K. S.; Takata, J.; Kong, A. K. H. +9 more
Here we report the results of searching millisecond pulsar (MSP) candidates from the Fermi LAT second source catalog (2FGL). Seven unassociated γ-ray sources in this catalog are identified as promising MSP candidates based on their γ-ray properties. Through the X-ray analysis, we have detected possible X-ray counterparts, localized to an arcsecond…
A high-resolution wide-field radio survey of M51
Argo, M. K.; Soria, R.; Tingay, S. J. +4 more
We present the highest resolution, wide-field radio survey of a nearby face-on star-forming galaxy to date. The multiphase centre technique is used to survey the entire disc of M51 (77 arcmin2) at a maximum resolution of 5 mas on a single 8 h pointing with the European Very Long Baseline Interferometry (VLBI) Network at 18 cm. In total,…