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First observation of planet-induced X-ray emission: The system HD 179949

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Oct 2007Embargo end date: 01 Jan 2007 English Publisher:Cambridge University Press (CUP)Journal:Proceedings of the International Astronomical Union, volume 3, pages 79-81 (issn: 1743-9213, eissn: 1743-9221, Copyright policy )
Authors: Jeffrey C. Hall; V. L. Kashyap; Steven H. Saar; Manfred Cuntz;

doi: 10.1017/s1743921308016414 , 10.48550/arxiv.0712.3270

arXiv: http://arxiv.org/abs/0712.3270

First observation of planet-induced X-ray emission: The system HD 179949

Abstract

AbstractWe present the first observation of planet-induced stellar X-ray activity, identified for the HD 179949 system, using Chandra / ACIS-S. The HD 179949 system consists of a close-in giant planet orbiting an F9 V star. Previous ground-based observations already showed enhancements in Ca II K in phase with the planetary orbit. We find an ∼30% increase in the X-ray flux over quiescent levels coincident with the phase of the Ca II enhancements. There is also a trend for the emission to be hotter at increased fluxes, confirmed by modeling, showing the enhancement at ∼1 keV compared to ∼0.4 keV for the background star.

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Keywords

Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
8
Average
Average
Average
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