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Equatorial noise emissions with a quasiperiodic modulation observed by DEMETER at harmonics of the O+ ion gyrofrequency
Němec, František; Santolík, Ondřej; Cornilleau-Wehrlin, Nicole +1 more
The analysis of ionospheric equatorial noise (EN) with a quasiperiodic (QP) modulation observed by the Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) spacecraft is presented. These EN emissions, also called whistler mode or fast magnetosonic waves, play an important role in acceleration of radiation belt elec…
Simple brane-world inflationary models — An update
Okada, Nobuchika; Okada, Satomi
In the light of the Planck 2015 results, we update simple inflationary models based on the quadratic, quartic, Higgs and Coleman-Weinberg potentials in the context of the Randall-Sundrum brane-world cosmology. Brane-world cosmological effect alters the inflationary predictions of the spectral index (ns) and the tensor-to-scalar ratio (r) from thos…
Energetic ions scattered into the loss cone with observations of the Cluster satellite
Yuan, Zhigang; Xiong, Ying; Wang, Jingfang
In this paper, we report in situ observations by the Cluster spacecraft of energetic ions scattered into the loss cone during the inbound pass from the plasma sheet into the plasmasphere. During the inbound pass of the plasma sheet, Cluster observed the isotropy ratio of energetic ions to gradually decrease from unity and the isotropic boundary ex…
On the Bright Loop Top Emission in Post-eruption Arcades
Isobe, Hiroaki; Tripathi, Durgesh; Ghosh, Avyarthana +1 more
Observations of post-eruption arcades (PEAs) in X-rays and EUV reveal strong localized brightenings at the loop top regions. The origins of these brightenings and their dynamics are not well understood to date. Here, we study the dynamics of PEAs using one-dimensional hydrodynamic modeling, focusing on understanding the formation of localized brig…
Coeval Intermediate-mass Star Formation in N4W
Chen, Zhiwei; Kwon, Jungmi; Tamura, Motohide +3 more
Protostars are mostly found in star-forming regions, where the natal molecular gas still remains. At about 5\prime west of the molecular bubble N4, N4W is identified as a star-forming clump hosting three Class II (IRS 1-3), and one Class I (IRS 4) young stellar objects (YSOs), as well as a submillimeter source SMM1. The near-IR polariza…
CO2 non-LTE limb emissions in Mars' atmosphere as observed by OMEGA/Mars Express
Gondet, B.; Forget, F.; Altieri, F. +7 more
We report on daytime limb observations of Mars upper atmosphere acquired by the OMEGA instrument on board the European spacecraft Mars Express. The strong emission observed at 4.3 µm is interpreted as due to CO2 fluorescence of solar radiation and is detected at a tangent altitude in between 60 and 110 km. The main value of OMEGA …
Temporal features of LS I +61°303 in hard X-rays from the Swift/BAT survey data
Cusumano, G.; La Parola, V.; Segreto, A. +2 more
We study the long-term spectral and timing behaviour of LS I +61°303 in hard X-rays (15-150 keV) using ∼10 years of survey data from the Swift Burst Alert Telescope (BAT) monitor. We focus on the detection of long periodicities known to be present in this source in multiple wavelengths. We clearly detect three periods: the shorter one at 26.48 d i…
The DISR imaging mosaic of Titan's surface and its dependence on emission angle
Karkoschka, Erich; Schröder, Stefan E.
The DISR (Descent Image/Spectral Radiometer) imagers took about 300 images during the descent of the Huygens probe in Titan's atmosphere. We combined them into a photometrically calibrated mosaic of Titan's surface within 100 km of the Huygens landing site with a resolution ranging from 1 km at 100 km distance from the landing site to 50 cm near t…
Clouds and hazes vertical structure of a Saturn's giant vortex from Cassini/VIMS-V data analysis
Oliva, F.; D'Aversa, E.; Moriconi, M. L. +3 more
We studied the evolution of a giant tropospheric vortex formed in the wake of the storm that encircled Saturn from December 2010 to July 2011 (Fletcher et al. [2011a] Science, 332, 1413-1417; Fletcher et al. [2012] Icarus, 221, 560-586; Sánchez-Lavega et al. [2011] Nature, 475, 71-74; Sánchez-Lavega et al. [2012] Icarus, 220, 561-576; Sayanagi et …
What Is the Source of Quiet Sun Transition Region Emission?
De Pontieu, Bart; Schmit, D. J.
Dating back to the first observations of the on-disk corona, there has been a qualitative link between the photosphere’s magnetic network and enhanced transition-temperature plasma emission. These observations led to the development of a general model that describes emission structures through the partitioning of the atmospheric volume with differ…