A Minimum‐Mass Extrasolar Nebula | Zendy

Marc J. Kuchner | Zendy

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A Minimum‐Mass Extrasolar Nebula

Author(s) -

Marc J. Kuchner

Publication year - 2004

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 - 10.1086/422577

Subject(s) - nebula , physics , protoplanetary nebula , planet , formation and evolution of the solar system , radius , astrophysics , exoplanet , astronomy , planetary nebula , emission nebula , minimum mass , astrobiology , stars , computer security , computer science

By analogy with the minimum-mass solar nebula, we construct a surface-densityprofile using the orbits of the 26 precise-Doppler planets found in multipleplanet systems: Sigma = 2200 grams per square centimeter (a/1 AU)^- beta, wherea is the circumstellar radius, and beta = 2.0 plus or minus 0.5. Theminimum-mass solar nebula is consistent with this model, but the uniform-alphaaccretion disk model is not. In a nebula with beta > 2, the center of the diskis the likely cradle of planet formation.Comment: 15 pages, including 2 figures. To appear in ApJ, 9/04 new version with prettier page layou

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