Imperial College London
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DrJamesOwen

Faculty of Natural Sciences, Department of Physics

Senior Lecturer in Exoplanet Physics
 
 
 
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Contact

 

+44 (0)20 7594 5785james.owen CV

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Owen:2020:mnras/staa2784,
author = {Owen, JE},
doi = {mnras/staa2784},
journal = {Monthly Notices of the Royal Astronomical Society},
pages = {5030--5040},
title = {Constraining the entropy of formation from young transiting planet},
url = {http://dx.doi.org/10.1093/mnras/staa2784},
volume = {498},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Recently, K2 and TESS have discovered transiting planets with radii between ∼5 and 10 R⊕ around stars with ages <100 Myr. These young planets are likely to be the progenitors of the ubiquitous super-Earths/sub-Neptunes, which are well studied around stars with ages 1 Gyr. The formation and early evolution of super-Earths/sub-Neptunes are poorly understood. Various planetary origin scenarios predict a wide range of possible formation entropies. We show how the formation entropies of young (∼20–60 Myr), highly irradiated planets can be constrained if their mass, radius, and age are measured. This method works by determining how low-mass an H/He envelope a planet can retain against mass-loss, this lower bound on the H/He envelope mass can then be converted into an upper bound on the entropy. If planet mass measurements with errors 20 per cent can be achieved for the discovered young planets around DS Tuc A and V1298 Tau, then insights into their origins can be obtained. For these planets, higher measured planet masses would be consistent with the standard core-accretion theory. In contrast, lower planet masses (6–7 M⊕) would require a ‘boil-off’ phase during protoplanetary disc dispersal to explain.
AU  - Owen,JE
DO  - mnras/staa2784
EP  - 5040
PY  - 2020///
SN  - 0035-8711
SP  - 5030
TI  - Constraining the entropy of formation from young transiting planet
T2  - Monthly Notices of the Royal Astronomical Society
UR  - http://dx.doi.org/10.1093/mnras/staa2784
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000587755500028&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://academic.oup.com/mnras/article/498/4/5030/5904773
UR  - http://hdl.handle.net/10044/1/85344
VL  - 498
ER  -
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