Spherical accretion

Re'em Sari; Peter Goldreich

doi:10.1086/504152

Spherical accretion

Re'em Sari^*, Peter Goldreich

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semicollisional accretion, which bridges the gap between these limiting cases. Particle crossing of the Hill sphere during the formation of the outer planets is likely to have taken place in the semicollisional regime.

Original language	English
Pages (from-to)	L65-L67
Journal	Astrophysical Journal
Volume	642
Issue number	1 II
DOIs	https://doi.org/10.1086/504152
State	Published - 1 May 2006
Externally published	Yes

Bibliographical note

Funding Information:
We thank S. Shapiro for a helpful discussion. R. S. is an Alfred P. Sloan Fellow and a Packard Fellow. This research was supported in part by NASA grant NAG 5-12037

Keywords

Accretion, accretion disks
Planets and satellites: formation

Access to Document

10.1086/504152

Cite this

@article{43fe2c2390e441eb9cd6c1083f8be4d0,

title = "Spherical accretion",

abstract = "We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semicollisional accretion, which bridges the gap between these limiting cases. Particle crossing of the Hill sphere during the formation of the outer planets is likely to have taken place in the semicollisional regime.",

keywords = "Accretion, accretion disks, Planets and satellites: formation",

author = "Re'em Sari and Peter Goldreich",

note = "Funding Information: We thank S. Shapiro for a helpful discussion. R. S. is an Alfred P. Sloan Fellow and a Packard Fellow. This research was supported in part by NASA grant NAG 5-12037",

year = "2006",

month = may,

day = "1",

doi = "10.1086/504152",

language = "אנגלית",

volume = "642",

pages = "L65--L67",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1 II",

}

TY - JOUR

T1 - Spherical accretion

AU - Sari, Re'em

AU - Goldreich, Peter

N1 - Funding Information: We thank S. Shapiro for a helpful discussion. R. S. is an Alfred P. Sloan Fellow and a Packard Fellow. This research was supported in part by NASA grant NAG 5-12037

PY - 2006/5/1

Y1 - 2006/5/1

N2 - We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semicollisional accretion, which bridges the gap between these limiting cases. Particle crossing of the Hill sphere during the formation of the outer planets is likely to have taken place in the semicollisional regime.

AB - We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semicollisional accretion, which bridges the gap between these limiting cases. Particle crossing of the Hill sphere during the formation of the outer planets is likely to have taken place in the semicollisional regime.

KW - Accretion, accretion disks

KW - Planets and satellites: formation

UR - http://www.scopus.com/inward/record.url?scp=33745324722&partnerID=8YFLogxK

U2 - 10.1086/504152

DO - 10.1086/504152

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:33745324722

SN - 0004-637X

VL - 642

SP - L65-L67

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Spherical accretion

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this