Temp Inversion - Chromospheric Activity Correlation

Go down

Temp Inversion - Chromospheric Activity Correlation

Post by Sirius_Alpha on 18th April 2010, 9:17 pm

A Correlation Between Stellar Activity and Hot Jupiter Emission Spectra

Abstract wrote:We present evidence for a correlation between the observed properties of hot Jupiter emission spectra and the activity levels of the host stars measured using Ca II H & K emission lines. We find that planets with dayside emission spectra that are well-described by standard, non-inverted 1D atmosphere models with water in absorption (HD 189733, TrES-1, TrES-3) orbit chromospherically active stars, while planets with emission spectra that are consistent with the presence of a high-altitude temperature inversion and water in emission orbit quieter stars. We propose that the increased UV flux received by planets orbiting active stars destroys the compounds responsible for the formation of the observed temperature inversions. We also derive a model-independent method for differentiating between these two atmosphere types using the secondary eclipse depths measured in the 3.6 and 4.5 micron bands on the Spitzer Space Telescope, and argue that the observed correlation is independent of the inverted/non-inverted paradigm for classifying hot Jupiter atmospheres.

Caps Lock: Cruise control for 'Cool'!

Number of posts : 3571
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Back to top

Permissions in this forum:
You cannot reply to topics in this forum