To cool is to keep: residual H/He atmospheres of super-Earths
| Main Authors: | Misener, William, Schlichting, Hilke E. |
|---|---|
| Other Authors: | Adams, Elisabeth R |
| Format: | Proceeding poster Journal |
| Bahasa: | eng |
| Terbitan: |
, 2021
|
| Subjects: | |
| Online Access: |
https://zenodo.org/record/5123512 |
| ctrlnum |
5123512 |
|---|---|
| fullrecord |
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<dc schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><contributor>Adams, Elisabeth R</contributor><creator>Misener, William</creator><creator>Schlichting, Hilke E.</creator><date>2021-07-22</date><description>Super-Earths will constitute a large portion of the small exoplanets well-suited for detailed atmospheric characterization that TESS aims to discover. Current theory predicts these planets accreted large nebular hydrogen/helium envelopes before disk dispersal, which have since been mostly lost through hydrodynamic outflows. The effects of this early evolution on super-Earths’ long-term atmospheric mass, composition, and redox state are largely unexplored, despite potential ramifications for both the habitability and atmospheric observability of this common class of planets. I present the observable outcomes of the atmospheric evolution of super-Earths undergoing core-powered mass loss. Using theoretical models, I demonstrate that loss of the primordial atmosphere can be incomplete, leading to a small residual H/He envelope. The masses of these remnant atmospheres vary by orders of magnitude depending on the planet's mass and the flux received from its host star. Super-Earths finish mass loss with retained atmospheric masses ranging from 10-8 to 10-3 planet masses for typical super-Earth parameters. I discuss how this residual hydrogen affects the composition and enhances potential observational signatures of these atmospheres.</description><identifier>https://zenodo.org/record/5123512</identifier><identifier>10.5281/zenodo.5123512</identifier><identifier>oai:zenodo.org:5123512</identifier><language>eng</language><relation>doi:10.5281/zenodo.5123511</relation><relation>url:https://zenodo.org/communities/tsc2</relation><rights>info:eu-repo/semantics/openAccess</rights><rights>https://creativecommons.org/licenses/by/4.0/legalcode</rights><subject>Exoplanets</subject><subject>Atmospheres</subject><subject>Super-Earths</subject><title>To cool is to keep: residual H/He atmospheres of super-Earths</title><type>Journal:Proceeding</type><type>Other:poster</type><recordID>5123512</recordID></dc>
|
| language |
eng |
| format |
Journal:Proceeding Journal Other:poster Other Journal:Journal |
| author |
Misener, William Schlichting, Hilke E. |
| author2 |
Adams, Elisabeth R |
| title |
To cool is to keep: residual H/He atmospheres of super-Earths |
| publishDate |
2021 |
| topic |
Exoplanets Atmospheres Super-Earths |
| url |
https://zenodo.org/record/5123512 |
| contents |
Super-Earths will constitute a large portion of the small exoplanets well-suited for detailed atmospheric characterization that TESS aims to discover. Current theory predicts these planets accreted large nebular hydrogen/helium envelopes before disk dispersal, which have since been mostly lost through hydrodynamic outflows. The effects of this early evolution on super-Earths’ long-term atmospheric mass, composition, and redox state are largely unexplored, despite potential ramifications for both the habitability and atmospheric observability of this common class of planets. I present the observable outcomes of the atmospheric evolution of super-Earths undergoing core-powered mass loss. Using theoretical models, I demonstrate that loss of the primordial atmosphere can be incomplete, leading to a small residual H/He envelope. The masses of these remnant atmospheres vary by orders of magnitude depending on the planet's mass and the flux received from its host star. Super-Earths finish mass loss with retained atmospheric masses ranging from 10-8 to 10-3 planet masses for typical super-Earth parameters. I discuss how this residual hydrogen affects the composition and enhances potential observational signatures of these atmospheres. |
| id |
IOS16997.5123512 |
| institution |
ZAIN Publications |
| institution_id |
7213 |
| institution_type |
library:special library |
| library |
Cognizance Journal of Multidisciplinary Studies |
| library_id |
5267 |
| collection |
Cognizance Journal of Multidisciplinary Studies |
| repository_id |
16997 |
| subject_area |
Multidisciplinary |
| city |
Stockholm |
| province |
INTERNASIONAL |
| shared_to_ipusnas_str |
1 |
| repoId |
IOS16997 |
| first_indexed |
2022-06-06T04:08:31Z |
| last_indexed |
2022-06-06T04:08:31Z |
| recordtype |
dc |
| _version_ |
1734901113550798848 |
| score |
17.610287 |