A compositional link between rocky exoplanets and their host stars

Vardan Adibekyan; Caroline Dorn; Sérgio G. Sousa; Nuno C. Santos; Bertram Bitsch; Garik Israelian; Christoph Mordasini; Susana C.C. Barros; Elisa Delgado Mena; Olivier D.S. Demangeon; João P. Faria; Pedro Figueira; Artur A. Hakobyan; Mahmoudreza Oshagh; Bárbara M.T.B. Soares; Masanobu Kunitomo; Yoichi Takeda; Emiliano Jofré; Romina Petrucci; Eder Martioli

doi:10.1126/science.abg8794

A compositional link between rocky exoplanets and their host stars

Vardan Adibekyan
, Caroline Dorn
, Sérgio G. Sousa
, Nuno C. Santos
, Bertram Bitsch
, Garik Israelian
, Christoph Mordasini
, Susana C.C. Barros
, Elisa Delgado Mena
, Olivier D.S. Demangeon
, João P. Faria
, Pedro Figueira
, Artur A. Hakobyan
, Mahmoudreza Oshagh
, Bárbara M.T.B. Soares
, Masanobu Kunitomo
, Yoichi Takeda
, Emiliano Jofré
, Romina Petrucci
, Eder Martioli

Research output: Contribution to journal › Article › peer-review

Abstract

Stars and planets both form by accreting material from a surrounding disk. Because they grow from the same material, theory predicts that there should be a relationship between their compositions. In this study, we search for a compositional link between rocky exoplanets and their host stars. We estimate the iron-mass fraction of rocky exoplanets from their masses and radii and compare it with the compositions of their host stars, which we assume reflect the compositions of the protoplanetary disks. We find a correlation (but not a 1:1 relationship) between these two quantities, with a slope of >4, which we interpret as being attributable to planet formation processes. Super-Earths and super-Mercuries appear to be distinct populations with differing compositions, implying differences in their formation processes.

Original language	English
Pages (from-to)	330-332
Number of pages	3
Journal	Science
Volume	374
Issue number	6565
DOIs	https://doi.org/10.1126/science.abg8794
Publication status	Published - 15 Oct 2021
Externally published	Yes

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10.1126/science.abg8794

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Adibekyan, V., Dorn, C., Sousa, S. G., Santos, N. C., Bitsch, B., Israelian, G., Mordasini, C., Barros, S. C. C., Mena, E. D., Demangeon, O. D. S., Faria, J. P., Figueira, P., Hakobyan, A. A., Oshagh, M., Soares, B. M. T. B., Kunitomo, M., Takeda, Y., Jofré, E., Petrucci, R., & Martioli, E. (2021). A compositional link between rocky exoplanets and their host stars. Science, 374(6565), 330-332. https://doi.org/10.1126/science.abg8794

@article{04c757ecb8bf4ab0a3facf5f5a624382,

title = "A compositional link between rocky exoplanets and their host stars",

abstract = "Stars and planets both form by accreting material from a surrounding disk. Because they grow from the same material, theory predicts that there should be a relationship between their compositions. In this study, we search for a compositional link between rocky exoplanets and their host stars. We estimate the iron-mass fraction of rocky exoplanets from their masses and radii and compare it with the compositions of their host stars, which we assume reflect the compositions of the protoplanetary disks. We find a correlation (but not a 1:1 relationship) between these two quantities, with a slope of >4, which we interpret as being attributable to planet formation processes. Super-Earths and super-Mercuries appear to be distinct populations with differing compositions, implying differences in their formation processes.",

author = "Vardan Adibekyan and Caroline Dorn and Sousa, \{S{\'e}rgio G.\} and Santos, \{Nuno C.\} and Bertram Bitsch and Garik Israelian and Christoph Mordasini and Barros, \{Susana C.C.\} and Mena, \{Elisa Delgado\} and Demangeon, \{Olivier D.S.\} and Faria, \{Jo{\~a}o P.\} and Pedro Figueira and Hakobyan, \{Artur A.\} and Mahmoudreza Oshagh and Soares, \{B{\'a}rbara M.T.B.\} and Masanobu Kunitomo and Yoichi Takeda and Emiliano Jofr{\'e} and Romina Petrucci and Eder Martioli",

year = "2021",

month = oct,

day = "15",

doi = "10.1126/science.abg8794",

language = "English",

volume = "374",

pages = "330--332",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "6565",

}

Adibekyan, V, Dorn, C, Sousa, SG, Santos, NC, Bitsch, B, Israelian, G, Mordasini, C, Barros, SCC, Mena, ED, Demangeon, ODS, Faria, JP, Figueira, P, Hakobyan, AA, Oshagh, M, Soares, BMTB, Kunitomo, M, Takeda, Y, Jofré, E, Petrucci, R & Martioli, E 2021, 'A compositional link between rocky exoplanets and their host stars', Science, vol. 374, no. 6565, pp. 330-332. https://doi.org/10.1126/science.abg8794

TY - JOUR

T1 - A compositional link between rocky exoplanets and their host stars

AU - Adibekyan, Vardan

AU - Dorn, Caroline

AU - Sousa, Sérgio G.

AU - Santos, Nuno C.

AU - Bitsch, Bertram

AU - Israelian, Garik

AU - Mordasini, Christoph

AU - Barros, Susana C.C.

AU - Mena, Elisa Delgado

AU - Demangeon, Olivier D.S.

AU - Faria, João P.

AU - Figueira, Pedro

AU - Hakobyan, Artur A.

AU - Oshagh, Mahmoudreza

AU - Soares, Bárbara M.T.B.

AU - Kunitomo, Masanobu

AU - Takeda, Yoichi

AU - Jofré, Emiliano

AU - Petrucci, Romina

AU - Martioli, Eder

PY - 2021/10/15

Y1 - 2021/10/15

N2 - Stars and planets both form by accreting material from a surrounding disk. Because they grow from the same material, theory predicts that there should be a relationship between their compositions. In this study, we search for a compositional link between rocky exoplanets and their host stars. We estimate the iron-mass fraction of rocky exoplanets from their masses and radii and compare it with the compositions of their host stars, which we assume reflect the compositions of the protoplanetary disks. We find a correlation (but not a 1:1 relationship) between these two quantities, with a slope of >4, which we interpret as being attributable to planet formation processes. Super-Earths and super-Mercuries appear to be distinct populations with differing compositions, implying differences in their formation processes.

AB - Stars and planets both form by accreting material from a surrounding disk. Because they grow from the same material, theory predicts that there should be a relationship between their compositions. In this study, we search for a compositional link between rocky exoplanets and their host stars. We estimate the iron-mass fraction of rocky exoplanets from their masses and radii and compare it with the compositions of their host stars, which we assume reflect the compositions of the protoplanetary disks. We find a correlation (but not a 1:1 relationship) between these two quantities, with a slope of >4, which we interpret as being attributable to planet formation processes. Super-Earths and super-Mercuries appear to be distinct populations with differing compositions, implying differences in their formation processes.

UR - https://www.scopus.com/pages/publications/85117614419

U2 - 10.1126/science.abg8794

DO - 10.1126/science.abg8794

M3 - Article

C2 - 34648350

AN - SCOPUS:85117614419

SN - 0036-8075

VL - 374

SP - 330

EP - 332

JO - Science

JF - Science

IS - 6565

ER -

A compositional link between rocky exoplanets and their host stars

Abstract

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