Search Publications

Monte Carlo radiation transfer in CV disk winds: application to the AM CVn prototype

Werner, K.; Feldmeier, A.; Kusterer, D. -J. +2 more

Context. AM CVn systems are ultracompact binaries in which a (semi-) degenerate star transfers helium-dominated matter onto a white dwarf. They are effective gravitational-wave emitters and potential progenitors of Type Ia supernovae.
Aims: To understand the evolution of AM CVn systems it is necessary to determine their mass-loss rate through…

Analysis of clumps in Saturn's F ring from Voyager and Cassini

Showalter, Mark R.; French, Robert S.; Hicks, Shannon K. +2 more

Saturn's F ring is subject to dynamic structural changes over short periods. Among the observed phenomena are diffuse extended bright clumps (ECs) ∼3-40° in longitudinal extent. These ECs appear, evolve, and disappear over a span of days to months. ECs have been seen by the two Voyager spacecraft, the Cassini Orbiter, and various ground- and space…

Concentration of electrostatic solitary waves around magnetic nulls within magnetic reconnection diffusion region: single-event-based statistics

Li, Shiyou; Zhang, Shifeng; Cai, Hong +1 more

It is important to study the 'concentrated' electrostatic solitary waves/structures (ESWs) associated with the magnetic reconnection. In the literature published as regards this topic, very few studies have reported the observation of such a large number of ESWs in a single magnetic reconnection event. In this work, we report our observation of a …

Kinematics of Solar Chromospheric Surges of AR 10930

Yurchyshyn, Vasyl; Cho, Kyung-Suk; Bong, Su-Chan

Imaging Comet ISON C/2012 S1 in the Inner Corona at Perihelion

Morgan, Huw; Habbal, Shadia Rifai; Druckmüller, Miloslav +2 more

Much anticipation and speculation were building around comet ISON, or C/2012 S1, discovered on 2012 September 21 by the International Scientific Optical Network telescope in Russia, and bound for the Sun on 2013 November 28, with a closest heliocentric approach distance of 2.7 R _⊙. Here we present the first white light image of the come…

Probing the primordial Universe from the low-multipole CMB data

Cheng, Cheng; Huang, Qing-Guo

Since the temperature fluctuations in the cosmic microwave background (CMB) on large-angular scales probe length scales that were super-horizon sized at photon decoupling and hence insensitive to microphysical processes, the low-multipole CMB data are supposed to be a good probe to the physics of the primordial Universe. In this letter we will con…

Hydrogen atoms in the inner heliosphere: SWAN-SOHO and MASCS-MESSENGER observations

Izmodenov, Vlad; Quémerais, Eric; Katushkina, Olga +2 more

We present here a study made by two instruments, Mercury Atmospheric and Surface Composition Spectrometer (MASCS) on MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) and Solar Wind Anisotropy (SWAN) on SOHO that observed the interplanetary background in 2010. The combination of these two data sets allows us to perform the …

On the shape of the mass-function of dense clumps in the Hi-GAL fields . II. Using Bayesian inference to study the clump mass function

Testi, L.; Elia, D.; Pezzuto, S. +6 more

Context. Stars form in dense, dusty clumps of molecular clouds, but little is known about their origin, their evolution, and their detailed physical properties. In particular, the relationship between the mass distribution of these clumps (also known as the "clump mass function", or CMF) and the stellar initial mass function (IMF) is still poorly …

Wave number determination of Pc 1-2 mantle waves considering He⁺⁺ ions: A Cluster study

Escoubet, C. P.; Khotyaintsev, Y.; Santolík, O. +2 more

The present case study concerns narrowband electromagnetic emission detected in the distant cusp region simultaneously with upgoing plasma flows. The wave properties match the usual properties of the Pc 1-2 mantle waves: small angle between the wave vector and the magnetic field line, left-hand polarization, and propagation toward the ionosphere. …

Titan's emission processes during eclipse

West, R. A.; Rannou, P.; Lavvas, P. +1 more

Observations of Titan's emissions during its 2009 eclipse by Saturn revealed a weak airglow around the moon, as well as a brighter emission from its disk (West et al. [2012]. Geophys. Res. Lett. 39 (1), 18204). We explore here the potential mechanisms that could generate these emissions and more specifically the role of magnetospheric plasma and c…