Evaporation, from exoplanets to exocomets
Here we review the last advances in our understanding of exoplanetary upper atmospheres, with a focus on the evaporation of exoplanets orbiting close to their stars. The atmospheric escape takes a significant part on the phenomena that sculpt the population of planets with short orbital distances.We...
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Académie des sciences
2023-06-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.142/ |
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| author | Lecavelier des Etangs, Alain |
| author_facet | Lecavelier des Etangs, Alain |
| author_sort | Lecavelier des Etangs, Alain |
| collection | DOAJ |
| description | Here we review the last advances in our understanding of exoplanetary upper atmospheres, with a focus on the evaporation of exoplanets orbiting close to their stars. The atmospheric escape takes a significant part on the phenomena that sculpt the population of planets with short orbital distances.We also observe evaporation of minor bodies in young planetary systems when they approach to their star. These “exocomets” have been studied since the mid 80’s, yielding a large amount of observational data. In particular, in the case of exocomets orbiting the young star β Pictoris, it has been shown that there are two different families of comets, tracing two different dynamical histories. Most recently, photometric observations with the NASA TESS space observatory allowed the detection of the dust tails produced by the evaporation of the exocomets’ nuclei. Using numerical simulation these observations allowed the derivation of the comets nuclei size distribution, which is found to be strikingly similar to the one observed in the Solar system and to the one expected for a collisionally relaxed population of minor bodies. |
| format | Article |
| id | doaj-art-38a6ad74b8f74445b04100ee838f98ba |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2023-06-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-38a6ad74b8f74445b04100ee838f98ba2025-02-07T13:52:55ZengAcadémie des sciencesComptes Rendus. Physique1878-15352023-06-0124S222123110.5802/crphys.14210.5802/crphys.142Evaporation, from exoplanets to exocometsLecavelier des Etangs, Alain0Institut d’astrophysique de Paris, CNRS, UMR 7095, Sorbonne Université, Paris, FranceHere we review the last advances in our understanding of exoplanetary upper atmospheres, with a focus on the evaporation of exoplanets orbiting close to their stars. The atmospheric escape takes a significant part on the phenomena that sculpt the population of planets with short orbital distances.We also observe evaporation of minor bodies in young planetary systems when they approach to their star. These “exocomets” have been studied since the mid 80’s, yielding a large amount of observational data. In particular, in the case of exocomets orbiting the young star β Pictoris, it has been shown that there are two different families of comets, tracing two different dynamical histories. Most recently, photometric observations with the NASA TESS space observatory allowed the detection of the dust tails produced by the evaporation of the exocomets’ nuclei. Using numerical simulation these observations allowed the derivation of the comets nuclei size distribution, which is found to be strikingly similar to the one observed in the Solar system and to the one expected for a collisionally relaxed population of minor bodies.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.142/ExoplanetsAtmospheresExocometsPlanetary systemsCircumstellar disksAtmospheric escapeBeta Pictoris |
| spellingShingle | Lecavelier des Etangs, Alain Evaporation, from exoplanets to exocomets Comptes Rendus. Physique Exoplanets Atmospheres Exocomets Planetary systems Circumstellar disks Atmospheric escape Beta Pictoris |
| title | Evaporation, from exoplanets to exocomets |
| title_full | Evaporation, from exoplanets to exocomets |
| title_fullStr | Evaporation, from exoplanets to exocomets |
| title_full_unstemmed | Evaporation, from exoplanets to exocomets |
| title_short | Evaporation, from exoplanets to exocomets |
| title_sort | evaporation from exoplanets to exocomets |
| topic | Exoplanets Atmospheres Exocomets Planetary systems Circumstellar disks Atmospheric escape Beta Pictoris |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.142/ |
| work_keys_str_mv | AT lecavelierdesetangsalain evaporationfromexoplanetstoexocomets |