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    The Mass Budgets and Spatial Scales of Exoplanet Systems and Protoplanetary Disks

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    Mulders_2021_ApJ_920_66.pdf
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    Author
    Mulders, G.D.
    Pascucci, I.
    Ciesla, F.J.
    Fernandes, R.B.
    Affiliation
    Lunar and Planetary Laboratory, University of Arizona
    Issue Date
    2021
    
    Metadata
    Show full item record
    Publisher
    IOP Publishing Ltd
    Citation
    Mulders, G. D., Pascucci, I., Ciesla, F. J., & Fernandes, R. B. (2021). The Mass Budgets and Spatial Scales of Exoplanet Systems and Protoplanetary Disks. Astrophysical Journal.
    Journal
    Astrophysical Journal
    Rights
    Copyright © 2021. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Planets are born from disks of gas and dust, and observations of protoplanetary disks are used to constrain the initial conditions of planet formation. However, dust mass measurements of Class II disks with ALMA have called into question whether they contain enough solids to build the exoplanets that have been detected to date. In this paper, we calculate the mass and spatial scale of solid material around Sun-like stars probed by transit and radial velocity exoplanet surveys and compare those to the observed dust masses and sizes of Class II disks in the same stellar-mass regime. We show that the apparent mass discrepancy disappears when accounting for observational selection and detection biases. We find a discrepancy only when the planet formation efficiency is below 100%, or if there is a population of undetected exoplanets that significantly contributes to the mass in solids. We identify a positive correlation between the masses of planetary systems and their respective orbital periods, which is consistent with the trend between the masses and the outer radii of Class II dust disks. This implies that, despite a factor 100 difference in spatial scale, the properties of protoplanetary disks seem to be imprinted on the exoplanet population. © 2021. The American Astronomical Society. All rights reserved.
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    Immediate access
    ISSN
    0004-637X
    DOI
    10.3847/1538-4357/ac178e
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/ac178e
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    UA Faculty Publications

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