The newborn planet population emerging from ring-like structures in discs
Herczeg, Gregory J
Manara, Carlo F
Mulders, Gijs D
van der Plas, Gerrit
Fischer, William J
AffiliationUniv Arizona, Lunar & Planetary Lab
Univ Arizona, Steward Observ, Dept Astron
MetadataShow full item record
PublisherOXFORD UNIV PRESS
CitationGiuseppe Lodato, Giovanni Dipierro, Enrico Ragusa, Feng Long, Gregory J Herczeg, Ilaria Pascucci, Paola Pinilla, Carlo F Manara, Marco Tazzari, Yao Liu, Gijs D Mulders, Daniel Harsono, Yann Boehler, François Ménard, Doug Johnstone, Colette Salyk, Gerrit van der Plas, Sylvie Cabrit, Suzan Edwards, William J Fischer, Nathan Hendler, Brunella Nisini, Elisabetta Rigliaco, Henning Avenhaus, Andrea Banzatti, Michael Gully-Santiago, The newborn planet population emerging from ring-like structures in discs, Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 1, June 2019, Pages 453–461, https://doi.org/10.1093/mnras/stz913
Rights© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
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AbstractALMA has observed a plethora of ring-like structures in planet-forming discs at distances of 10-100 au from their host star. Although several mechanisms have been invoked to explain the origin of such rings, a common explanation is that they trace new-born planets. Under the planetary hypothesis, a natural question is how to reconcile the apparently high frequency of gap-carving planets at 10-100 au with the paucity of Jupiter-mass planets observed around main-sequence stars at those separations. Here, we provide an analysis of the new-born planet population emerging from observations of gaps in discs, under the assumption that the observed gaps are due to planets. We use a simple estimate of the planet mass based on the gap morphology, and apply it to a sample of gaps recently obtained by us in a survey of Taurus with ALMA. We also include additional data from recent published surveys, thus analysing the largest gap sample to date, for a total of 48 gaps. The properties of the purported planets occupy a distinctively different region of parameter space with respect to the known exo-planet population, currently not accessible through planet finding methods. Thus, no discrepancy in the mass and radius distribution of the two populations can be claimed at this stage. We show that the mass of the inferred planets conforms to the theoretically expected trend for the minimum planet mass needed to carve a dust gap. Finally, we estimate the separation and mass of the putative planets after accounting for migration and accretion, for a range of evolutionary times, finding a good match with the distribution of cold Jupiters.
VersionFinal published version
SponsorsEuropean Union ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; DISCSIM project - European Research Council [341137, ERC-2013-ADG]; UK Science and Technology research Council (STFC); National Research Council of Canada; NSERC Discovery Grant; ANR of France [ANR-16-CE31-0013]; National Science Foundation of China [11773002, 11473005]; ESO Fellowship; Deutsche Forschungs-Gemeinschaft (DFG, German Research Foundation) [FOR 2634/1 TE 1024/1-1]; DFG cluster of excellence Origin and Structure of the Universe; project PRIN-INAF 2016 The Cradle of Life - GENESIS-SKA (General Conditions in Early Planetary Systems for the rise of life with SKA)