Search Publications

Identification of Ambient Molecular Clouds Associated with Galactic Supernova Remnant IC 443

Yun, Min S.; Koo, Bon-Chul; Lee, Jae-Joon +3 more

The Galactic supernova remnant (SNR) IC 443 is one of the most studied core-collapse SNRs for its interaction with molecular clouds. However, the ambient molecular clouds with which IC 443 is interacting have not been thoroughly studied and remain poorly understood. Using the Five College Radio Astronomy Observatory 14 m telescope, we obtained ful…

Observational Aspects of Particle Acceleration in Large Solar Flares

Krucker, Säm; Raymond, John C.; Lin, Robert P. +1 more

Solar flares efficiently accelerate electrons to several tens of MeV and ions to 10 GeV. The acceleration is usually thought to be associated with magnetic reconnection occurring high in the corona, though a shock produced by the Coronal Mass Ejection (CME) associated with a flare can also accelerate particles. Diagnostic information comes from em…

On the origin of high-energy particles in the cusp diamagnetic cavity

Kronberg, E.; Daly, P.; Adamson, E. +2 more

We have analyzed Cluster magnetic field and plasma data during a high-altitude cusp crossing in 2003. The Cluster separation was ∼5000km and provided unique measurements of high energy particle properties both inside the DiaMagnetic Cavity (DMC) and surrounding magnetosheath. Most of the high energy electrons and protons had pitch angles of ∼90° i…

A peculiar class of debris disks from Herschel/DUNES. A steep fall off in the far infrared

Krivov, A. V.; Eiroa, C.; Löhne, T. +21 more

Context. The existence of debris disks around old main sequence stars is usually explained by continuous replenishment of small dust grains through collisions from a reservoir of larger objects.
Aims: We present photometric data of debris disks around HIP 103389 (HD 199260), HIP 107350 (HN Peg, HD 206860), and HIP 114948 (HD 219482), obtained…

The Occurrence and Speed of CMEs Related to Two Characteristic Evolution Patterns of Helicity Injection in Their Solar Source Regions

Wang, Haimin; Chae, Jongchul; Liu, Rui +4 more

Long-term (a few days) variation of magnetic helicity injection was calculated for 28 solar active regions that produced 47 coronal mass ejections (CMEs) to find its relationship to the CME occurrence and speed using SOHO/MDI line-of-sight magnetograms. As a result, we found that the 47 CMEs can be categorized into two different groups by two char…

Observations of the Polarisation of the Anomalous Microwave Emission: A Review

Rebolo, R.; Rubiño-Martín, J. A.; Génova-Santos, R. +1 more

A Herschel Search for Cold Dust in Brown Dwarf Disks: First Results

Pascucci, Ilaria; Henning, Thomas; Ménard, François +7 more

We report initial results from a Herschel program to search for far-infrared emission from cold dust around a statistically significant sample of young brown dwarfs. The first three objects in our survey are all detected at 70 µm, and we report the first detection of a brown dwarf at 160 µm. The flux densities are consistent with the p…

A journey from the outskirts to the cores of groups. I. Color- and mass-segregation in 20K-zCOSMOS groups

Finoguenov, A.; Kneib, J. -P.; Cimatti, A. +49 more

Context. Studying theevolution of galaxies located within groups may have important implications for our understanding of the global evolution of the galaxy population as a whole. The fraction of galaxies bound in groups at z ~ 0 is as high as 60% and therefore any mechanism (among the many suggested) that could quench star formation when a galaxy…

Probing the nuclear and circumnuclear activity of NGC 1365 in the infrared

Esquej, P.; Hatziminaoglou, E.; Acosta-Pulido, J. A. +12 more

We present new far-infrared (70-500 µm) Herschel Photodetector Array Camera and Spectrometer (PACS) and Spectral and Photometric Imaging Receiver (SPIRE) imaging observations as well as new mid-IR Gemini/Thermal-Region Camera Spectrograph imaging (8.7 and 18.3 µm) and spectroscopy of the inner Lindblad resonance (ILR) region (R < 2.…

An MHD simulation model of time-dependent co-rotating solar wind

Hayashi, K.

We present a treatment of observation-based time-dependent boundary conditions for the inner boundary sphere in the time-dependent three-dimensional MHD simulations of the global solar wind. With this boundary treatment, we obtain super-Alfvenic MHD solutions of time-dependent co-rotating solar wind structures. The boundary variables on the inner …