X-Ray Irradiation of the Giant Planet Orbiting the T Tauri Star TAP 26

We present new Chandra X-ray observations of TAP 26, a ≈17 Myr old magnetically active weak-lined T Tauri star that has been reported to host a massive planet in a ≈10.8 day orbit. At a separation of a = 0.097 au the planet will be exposed to intense X-ray and UV radiation from the star. The first o...

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Bibliographic Details
Published in:The Astrophysical journal 2024-06, Vol.967 (2), p.126
Main Authors: Skinner, Stephen L., Güdel, Manuel
Format: Article
Language:English
Subjects:
Emission
Emissions
Ionization
Irradiation
Planets
Star-planet interactions
Stars
T Tauri stars
Ultraviolet radiation
X ray irradiation
X-ray astronomy
X-ray emissions
X-ray fluxes
X-rays
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Summary:We present new Chandra X-ray observations of TAP 26, a ≈17 Myr old magnetically active weak-lined T Tauri star that has been reported to host a massive planet in a ≈10.8 day orbit. At a separation of a = 0.097 au the planet will be exposed to intense X-ray and UV radiation from the star. The first observation caught the star in a state of elevated X-ray emission with variability on a timescale of a few hours and an X-ray temperature kT x ≈ 2–4 keV. Two subsequent observations 5–10 days later showed slow variability and a lower X-ray flux and temperature ( kT x ≈ 1 keV). We characterize the X-ray emission and estimate the X-ray ionization and heating rates that will need to be incorporated into realistic models of the planet’s atmosphere.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ad4465