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Collisional evolution and reddening of asteroid surfaces–I. The problem of conflicting time-scales and the role of size-dependent effects
meteorites meteors meteoroids–minor planets asteroids: general
2015/12/25
Space weathering is the generic term used for processes that modify the optical properties of surfaces of atmosphereless rocky bodies under exposure to the space environment. The general agreement abo...
Formes d’asteroides et formation de satellites:role de la reaccumulation gravitationnelle
Solar System Asteroids Satellites Collisions
2015/12/25
Asteroid shapes and satellite formation: role of gravitational re-accumulation.Following current evidence, it is widely accepted that many asteroids would be ‘gravitational aggregates’, i.e. bodies la...
The Role of Tiny Grains on the Accretion Process in Protoplanetary Disks
Tiny Grains Accretion Process Protoplanetary Disks
2011/10/9
Tiny grains such as PAHs have been thought to dramatically reduce the coupling between gas and magnetic fields in weakly ionized gas such as in protoplanetary disks (PPDs) because they provide tremend...
Role of Magnetic Carpet in Coronal Heating
Sun—corona—magnetic field—magnetic carpet—reconnection
2010/9/16
One of the fundamental questions in solar physics is how the solar corona maintains its high temperature of several million Kelvin above photosphere with a temperature of 6000 K.
Observations show th...
Role of Magnetic Carpet in Coronal Heating
Sun corona magnetic field magnetic carpet reconnection
2009/5/6
One of the fundamental questions in solar physics is how
the solar corona maintains its high temperature of several million Kelvin
above photosphere with a temperature of 6000 K.
Observations show...
Does Si Play a Role in the Formation of Extrasolar Planet Systems?
Planetary systems formation—stars abundances—stars late-type
2010/9/16
With the high signal-to-noise ratio spectra, we obtained Si abundances of 22 extrasolar planet host stars, and discussed some constraints on the planet formation. Using our silicon abundance results a...