TY - JOUR
T1 - Angular momentum transport in astrophysical disks
AU - Griv, Evgeny
AU - Liverts, Edward
AU - Mond, Michael
N1 - Funding Information:
The authors thank David Eichler, Michael Gedalin, Yury Luybarsky, and Irena Zlatopolsky for numerous comments on an early version of the manuscript and for helpful critiques. This work was supported in part by the Binational Israel-US Science Foundation, the Israel Science Foundation, and the Israeli Ministry of Immigrant Absorption in the framework of the program “KAMEA.”
PY - 2008/1/1
Y1 - 2008/1/1
N2 - The evolution of astrophysical disks is dominated by instabilities of gravity perturbations (e.g., those produced by a spontaneous disturbance). We develop a hydrodynamic theory of nonresonant Jeans instability in a dynamically cold subsystem (identified as the gaseous component) of a disk. We show analytically that gravitationally unstable systems, such as disks of rotationally supported galaxies, protoplanetary disks, and, finally, the solar nebula are efficient at transporting mass and angular momentum: already on a timescale of on the order of 2-3 rotational periods an unstable disk sees a large portion of its angular momentum transferred outward, and mass transferred both inward and outward.
AB - The evolution of astrophysical disks is dominated by instabilities of gravity perturbations (e.g., those produced by a spontaneous disturbance). We develop a hydrodynamic theory of nonresonant Jeans instability in a dynamically cold subsystem (identified as the gaseous component) of a disk. We show analytically that gravitationally unstable systems, such as disks of rotationally supported galaxies, protoplanetary disks, and, finally, the solar nebula are efficient at transporting mass and angular momentum: already on a timescale of on the order of 2-3 rotational periods an unstable disk sees a large portion of its angular momentum transferred outward, and mass transferred both inward and outward.
KW - Formation
KW - Formation - Solar system
KW - Galaxies
KW - Kinematics and dynamics-planetary systems
UR - http://www.scopus.com/inward/record.url?scp=66249103384&partnerID=8YFLogxK
U2 - 10.1086/527295
DO - 10.1086/527295
M3 - Article
AN - SCOPUS:66249103384
SN - 0004-637X
VL - 672
SP - L127-L130
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2 PART 2
ER -