English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
 Local TagsRelease HistoryDetailsSummary
  Young planets under extreme UV irradiation: Upper atmosphere modelling of the young exoplanet K2-33b

Kubyshkina, D., Lendl, M., Fossati, L., Cubillos, P., Lammer, H., Erkaev, N., et al. (2018). Young planets under extreme UV irradiation: Upper atmosphere modelling of the young exoplanet K2-33b.

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CCB0-E Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CCB1-D
Genre: Proceedings

Files

show Files

Locators

show
hide
Locator:
https://ui.adsabs.harvard.edu/abs/2018EGUGA..2016089K (Any fulltext)
Description:
-
OA-Status:

Creators

show
hide
 Creators:
Kubyshkina, Daria1, Author
Lendl, Monika1, Author
Fossati, Luca1, Author
Cubillos, Patricio1, Author
Lammer, Helmut1, Author
Erkaev, Nikolay1, Author
Johnstone, Colin1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

Content

show
hide
Free keywords: -
 Abstract: The K2-33 b is a planet of 5 Earth radii orbiting the young M-type host star, recently emerged from the interplanetary disc. The extreme youth of the system (<20 Myr) gives the unprecedented opportunity to study the earliest phases of planetary evolution, at a stage when the planet is exposed to an extremely high level of high-energy radiation emitted by the host star. Since the planetary mass remains unknown (the estimated upper limit is 5.4 Jupiter mass), we perform a series of 1D hydrodynamic simulations of the planet's upper atmosphere considering a range of most probable possible planetary masses in the range from super-Earth to the twice of Neptune. To account for internal heating as a result of contraction, we set the temperature range from the black body temperature of the planet of 850 K to 1300 K. As the result, we obtain temperature profiles mostly controlled by the planet's mass, while the equilibrium temperature has a secondary effect. For planetary masses below 7-10 Earth mass, the atmosphere is exposed to extremely high escape rates, driven by the planet's weak gravity and high thermal energy, which increase with decreasing mass and/or increasing temperature. For higher masses, the escape is instead driven by the absorption of the high-energy stellar radiation. A rough comparison of the timescales for complete atmospheric escape and age of the system indicates that the planet is more massive than 10 Earth masses.

Details

show
hide
Language(s):
 Dates: 2018
 Publication Status: Issued
 Pages: 16089
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: -
 Degree: -

Event

show
hide
Title: EGU General Assembly Conference Abstracts
Place of Event: -
Start-/End Date: 2018

Legal Case

show

Project information

show

Source

show