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Gravitational instability and clustering in a disk of planetesimals
stars planetary systems protoplanetary disks – gravitation – planets satellites formation
2015/12/25
For a long time, gravitational instability in the disk of planetesimals has been suspected to be the main engine responsible for the beginning of dust growth, its advantage being that it provides forr...
Planetesimal clusters in a Keplerian disk I. gravitational evolution
planetary systems formation protoplanetary disks gravitation
2015/12/25
It was recently demonstrated by numerical simulations that a turbulent flow in a rotating system is capable of efficiently concentrating passively advected particles – having a density larger thanthe ...
Chemical evolution of a protoplanetary disk
accretion disks astrochemistry diff usion line:formation molecular processes
2011/10/13
In this paper we review recent progress in our understanding of the chemical evolution of protoplanetary disks. Current observational constraints and theoretical modeling on the chemical composition o...
Stripping a debris disk by close stellar encounters in an open stellar cluster
Stars : circumstellar matter surveys stars: low-mass planetary systems : formation
2011/9/28
A debris disk is a constituent of any planetary system surrounding a main sequence star. We study whether close stellar encounters can disrupt and strip a debris disk of its planetesimals in the expan...
Using planetary nebulae to probe the structure of the galactic thin disk
planetary nebulae galactic thin disk
2009/6/25
Using planetary nebulae to probe the structure of the galactic thin disk。
A new determination of the rotation curve from galactic disk planetary nebulae
rotation curve planetary nebulae
2009/6/25
A new determination of the rotation curve from galactic disk planetary nebulae。
Radial gradients and metallicities in the galactic disk
Radial gradients metallicities galactic disk
2009/6/11
Radial gradients and metallicities in the galactic disk。
Search for Orbital Motion of the Pulsar 4U 1626-67: Candidate for a Neutron Star with a Supernova Fall-back Accretion Disk
Stars binaries eclipsing stars binaries spectroscopic
2009/5/12
We use the method introduced by Karami & Mohebi (2007), and Karami & Teimoorinia (2007) which enable us to derive the orbital parameters of the spectroscopic binary stars by the nonlinear least square...