The corona of GJ 1151 in the context of star-planet interaction. (arXiv:2007.05317v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Foster_G/0/1/0/all/0/1">G. Foster</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Poppenhaeger_K/0/1/0/all/0/1">K. Poppenhaeger</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Alvarado_Gomez_J/0/1/0/all/0/1">J. D. Alvarado-G&#xf3;mez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schmitt_J/0/1/0/all/0/1">J.H.M.M. Schmitt</a>

The low-mass star GJ 1151 has been reported to display variable low-frequency
radio emission, which has been interpreted as a signpost of coronal star-planet
interactions with an unseen exoplanet. Here we report the first X-ray detection
of GJ 1151’s corona based on XMM-Newton data. We find that the star displays a
small flare during the X-ray observation. Averaged over the observation, we
detect the star with a low coronal temperature of 1.6~MK and an X-ray
luminosity of $L_X = 5.5times 10^{26}$,erg/s. During the quiescent time
periods excluding the flare, the star remains undetected with an upper limit of
$L_{X,,qui} leq 3.7times 10^{26}$,erg/s. This is compatible with the
coronal assumptions used in a recently published model for a star-planet
interaction origin of the observed radio signals from this star.

The low-mass star GJ 1151 has been reported to display variable low-frequency
radio emission, which has been interpreted as a signpost of coronal star-planet
interactions with an unseen exoplanet. Here we report the first X-ray detection
of GJ 1151’s corona based on XMM-Newton data. We find that the star displays a
small flare during the X-ray observation. Averaged over the observation, we
detect the star with a low coronal temperature of 1.6~MK and an X-ray
luminosity of $L_X = 5.5times 10^{26}$,erg/s. During the quiescent time
periods excluding the flare, the star remains undetected with an upper limit of
$L_{X,,qui} leq 3.7times 10^{26}$,erg/s. This is compatible with the
coronal assumptions used in a recently published model for a star-planet
interaction origin of the observed radio signals from this star.

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