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An Investigation of the CME of 3 November 2011 and Its Associated Widespread Solar Energetic Particle Event

Long, D. M.; Harra, L. K.; Matthews, S. A. +2 more

Multi-spacecraft observations are used to study the in-situ effects of a large coronal mass ejection (CME) erupting from the farside of the Sun on 3 November 2011, with particular emphasis on the associated solar energetic particle (SEP) event. At that time both Solar Terrestrial Relations Observatory (STEREO) spacecraft were located more than 90 …

The methane mole fraction in Titan’s stratosphere from DISR measurements during the Huygens probe’s descent

Bézard, Bruno

We present a determination of the methane mole fraction in Titan's stratosphere using spectral measurements by the Upward Looking Infrared Spectrometer (ULIS) of the Descent Imager/Spectral Radiometer (DISR) aboard the Huygens probe. We analyzed the 1.4-µm band of methane for which a complete linelist, down to very low intensities, was recen…

Can Charge Exchange Explain Anomalous Soft X-Ray Emission in the Cygnus Loop?

Wu, Y.; Shelton, R. L.; Henley, D. B. +4 more

Recent X-ray studies have shown that supernova shock models are unable to satisfactorily explain X-ray emission in the rim of the Cygnus Loop. In an attempt to account for this "anomalously" enhanced X-ray flux, we fit the region with a model including theoretical charge exchange (CX) data along with shock and background X-ray models. The model in…

Bridging EUV and White-Light Observations to Inspect the Initiation Phase of a "Two-Stage" Solar Eruptive Event

Seaton, D. B.; Habbal, S. R.; Bain, H. M. +2 more

The initiation phase of coronal mass ejections (CMEs) is a very important aspect of solar physics, as these phenomena ultimately drive space weather in the heliosphere. This phase is known to occur between the photosphere and low corona, where many models introduce an instability and/or magnetic reconnection that triggers a CME, often with associa…

A CO Survey in Planet-forming Disks: Characterizing the Gas Content in the Epoch of Planet Formation

Ménard, F.; Casassus, S.; Eiroa, C. +13 more

We carried out a ¹²CO(3-2) survey of 52 southern stars with a wide range of IR excesses (L _IR/L _*) using the single-dish telescopes APEX and ASTE. The main aims were (1) to characterize the evolution of molecular gas in circumstellar disks using L _IR/L _* values as a proxy of disk dust evolutio…

Cosmic Ray Transport in Heliospheric Magnetic Structures. I. Modeling Background Solar Wind Using the CRONOS Magnetohydrodynamic Code

Fichtner, H.; Heber, B.; Kühl, P. +4 more

The transport of energetic particles such as cosmic rays is governed by the properties of the plasma being traversed. While these properties are rather poorly known for galactic and interstellar plasmas due to the lack of in situ measurements, the heliospheric plasma environment has been probed by spacecraft for decades and provides a unique oppor…

Gas Bulk Motion in the Perseus Cluster Measured with Suzaku

Fukazawa, Y.; Tamura, T.; Iizuka, R. +8 more

We present the results from Suzaku observations of the Perseus Cluster, which is relatively close, the brightest in the X-ray sky, and a relaxed object with a cool core. A number of exposures of central regions and offset pointing with the X-ray Imaging Spectrometer cover a region within radii of 20'-30'. The central data are used to evaluate the …

The X-CLASS-redMaPPer galaxy cluster comparison. I. Identification procedures

Pierre, M.; Faccioli, L.; Clerc, N. +5 more

Context. This paper is the first in a series undertaking a comprehensive correlation analysis between optically selected and X-ray-selected cluster catalogues. The rationale of the project is to develop a holistic picture of galaxy clusters utilising optical and X-ray-cluster-selected catalogues with well-understood selection functions.
Aims:…

Black hole spin and size of the X-ray-emitting region(s) in the Seyfert 1.5 galaxy ESO 362-G18

Bianchi, S.; Fabian, A. C.; Miniutti, G. +7 more

We report results from multi-epoch X-ray observations of the Seyfert 1.5 galaxy ESO 362-G18 performed between 2005 November and 2010 June. ESO 362-G18 generally exhibits the typical X-ray spectrum of type 1 active galactic nuclei. A disc-reflection component accounts for broad residuals in the iron K band and above 10 keV, as well as for a signifi…

Probing the solar interface region

De Pontieu, Bart; Carlsson, Mats; Title, Alan