Halting Planet Migration in the Evacuated Centers of Protoplanetary Disks | Zendy

Marc J. Kuchner | Zendy; M. Lecar | Zendy

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Halting Planet Migration in the Evacuated Centers of Protoplanetary Disks

Author(s) -

Marc J. Kuchner,

M. Lecar

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/342370

Subject(s) - planet , physics , magnetorotational instability , planetary migration , exoplanet , astrophysics , protoplanetary disk , astronomy , accretion (finance) , sublimation (psychology) , astrobiology , magnetohydrodynamics , psychology , psychotherapist , plasma , quantum mechanics

Precise Doppler searches for extrasolar planets find a surfeit of planetswith orbital periods of 3-4 days, and no planets with orbital periods less than3 days. The circumstellar distance, R_0, where small grains in a protoplanetarydisk reach sublimation temperature (~1500 K) corresponds to a period of ~6days. Interior to R_0, turbulent accretion due to magneto-rotationalinstability may evacuate the disk center. We suggest that planets with orbitalperiods of 3-4 days are so common because migrating planets halt once thisevacuated region contains the sites of their exterior 2:1 Lindblad resonances.Comment: 9 pages, 1 figure, to appear in ApJ letter

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