The Evolutionary Track of H/He Envelopes of the Observed Population of Sub-Neptunes and Super-Earths
| dc.contributor.author | Estrela R. | |
| dc.contributor.author | Swain M.R. | |
| dc.contributor.author | Gupta A. | |
| dc.contributor.author | Sotin C. | |
| dc.contributor.author | Valio A. | |
| dc.date.accessioned | 2024-03-12T23:47:11Z | |
| dc.date.available | 2024-03-12T23:47:11Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | © 2020. The American Astronomical Society. All rights reserved..The observational detection of a localized reduction in the small planet occurrence rate, sometimes termed a "gap,"is an exciting discovery because of the implications for planet evolutionary history. This gap appears to define a transition region in which sub-Neptune planets are believed to have lost their H/He envelopes, potentially by photoevaporation or core powered mass loss, and have thus been transformed into bare core terrestrial planets. Here we investigate the transition between sub-Neptunes and super-Earths using a real sample of observed small close-in planets and applying envelope evolution models of the H/He envelope together with the mass-radius diagram and a photoevaporation model. We find that photoevaporation can explain the H/He envelope loss of most super-Earths in 100 Myr, although an additional loss mechanism appears necessary in some planets. We explore the possibility that these planets' families have different core masses and find a continuum in the primordial population of the strongly irradiated super-Earths and the sub-Neptunes. Our analysis also shows that close-orbiting sub-Neptunes with R < 3.5 R ⊕ typically lose ∼30% of their primordial envelope. | |
| dc.description.issuenumber | 2 | |
| dc.description.volume | 898 | |
| dc.identifier.doi | 10.3847/1538-4357/ab9a4d | |
| dc.identifier.issn | 1538-4357 | |
| dc.identifier.uri | https://dspace.mackenzie.br/handle/10899/34936 | |
| dc.relation.ispartof | Astrophysical Journal | |
| dc.rights | Acesso Aberto | |
| dc.title | The Evolutionary Track of H/He Envelopes of the Observed Population of Sub-Neptunes and Super-Earths | |
| dc.type | Artigo | |
| local.scopus.citations | 7 | |
| local.scopus.eid | 2-s2.0-85089305027 | |
| local.scopus.updated | 2024-05-01 | |
| local.scopus.url | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85089305027&origin=inward |