{"id":16206,"date":"2018-08-28T00:26:57","date_gmt":"2018-08-27T22:26:57","guid":{"rendered":"http:\/\/karmaka.de\/?p=16206"},"modified":"2018-09-17T08:33:30","modified_gmt":"2018-09-17T06:33:30","slug":"the-formation-of-jupiter-by-hybrid-pebble-planetesimal-accretion","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=16206","title":{"rendered":"The formation of Jupiter by hybrid pebble\u2013planetesimal accretion<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>Yann Alibert, Julia Venturini, Ravit Helled, Sareh Ataiee, Remo Burn, Luc Senecal, Willy Benz, Lucio Mayer, Christoph Mordasini, Sascha P. Quanz &#038; Maria Sch\u00f6nb\u00e4chler <\/p>\n<p>Nature Astronomy (2018) <\/p>\n<p><a href=\"https:\/\/arxiv.org\/ftp\/arxiv\/papers\/1809\/1809.05383.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><br \/>\n<a href=\"https:\/\/www.nature.com\/articles\/s41550-018-0557-2\" target=\"_blank\">LINK<\/a><\/p>\n<p>&#8220;The standard model for giant planet formation is based on the accretion of solids by a growing planetary embryo, followed by rapid gas accretion once the planet exceeds a so-called critical mass1. However, the dominant size of the accreted solids (\u2018pebbles\u2019 of the order of centimetres or \u2018planetesimals\u2019 of the order of kilometres to hundreds of kilometres) is unknown. Recently, high-precision measurements of isotopes in meteorites have provided evidence for the existence of two reservoirs of small bodies in the early Solar System3. These reservoirs remained separated from ~1\u2009Myr until ~3\u2009Myr after the Solar System started to form. This separation is interpreted as resulting from Jupiter growing and becoming a barrier for material transport. In this framework, Jupiter reached ~20 Earth masses (M\u2295) within ~1\u2009Myr and slowly grew to ~50\u2009M\u2295 in the subsequent 2\u2009Myr before reaching its present-day mass3. The evidence that Jupiter\u2019s growth slowed after reaching 20\u2009M\u2295 for at least 2\u2009Myr is puzzling because a planet of this mass is expected to trigger fast runaway gas accretion. Here, we use theoretical models to describe the conditions allowing for such a slow accretion and show that Jupiter grew in three distinct phases. First, rapid pebble accretion supplied the major part of Jupiter\u2019s core mass. Second, slow planetesimal accretion provided the energy required to hinder runaway gas accretion during the 2\u2009Myr. Third, runaway gas accretion proceeded. Both pebbles and planetesimals therefore play an important role in Jupiter\u2019s formation.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yann Alibert, Julia Venturini, Ravit Helled, Sareh Ataiee, Remo Burn, Luc Senecal, Willy Benz, Lucio Mayer, Christoph Mordasini, Sascha P. Quanz &#038; Maria Sch\u00f6nb\u00e4chler Nature Astronomy (2018) PDF (OPEN ACCESS) LINK &#8220;The standard model for&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74,72,1160,73,71],"tags":[3701,2267,1802,257],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16206"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16206"}],"version-history":[{"count":3,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16206\/revisions"}],"predecessor-version":[{"id":16260,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16206\/revisions\/16260"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}