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20 papers · 2 filters
On the role of meridional flows in flux transport dynamo models
L. Jouve, A. S. Brun
The Sun is a magnetic star whose magnetism and cyclic activity is linked to the existence of an internal dynamo. We aim to understand the establishment of the solar magnetic 22-yr…
Infrared and X-Ray Evidence for Circumstellar Grain Destruction by the Blast Wave of Supernova 1987A
E. Dwek, R. G. Arendt, P. Bouchet +10
Multiwavelength observations of supernova remnant (SNR) 1987A show that its morphology and luminosity are rapidly changing at X-ray, optical, infrared, and radio wavelengths as the…
SZ and CMB reconstruction using Generalized Morphological Component Analysis
J. Bobin, Y. Moudden, J. -L. Starck +2
In the last decade, the study of cosmic microwave background (CMB) data has become one of the most powerful tools to study and understand the Universe. More precisely, measuring th…
Triggering of merger-induced starbursts by the tidal field of galaxy groups and clusters
Marie Martig, Frederic Bournaud
Star formation in galaxies is for a part driven by galaxy mergers. At low redshift, star formation activity is low in high-density environments like groups and clusters, and the st…
Oscillations in Procyon A: First results from a multi-site campaign
S. Hekker, T. Arentoft, H. Kjeldsen +45
Procyon A is a bright F5IV star in a binary system. Although the distance, mass and angular diameter of this star are all known with high precision, the exact evolutionary state is…
Ultrahigh energy cosmic rays as heavy nuclei from cluster accretion shocks
Susumu Inoue, Guenter Sigl, Francesco Miniati +1
Large-scale accretion shocks around massive clusters of galaxies, generically expected in hierarchical scenarios of cosmological structure formation, are shown to be potential sour…