X-ray activity phased with planet motion in HD 189733?

Abstract

We report on the follow-up XMM-Newton observation of the planet-hosting star HD 189733 we obtained in April 2011. We observe a flare just after the secondary transit of the hot Jupiter. This event shares the same phase and many of the characteristics of the flare we observed in 2009. We suggest that a systematic interaction between planet and stellar magnetic fields when the planet passes close to active regions on the star can lead to periodic variability phased with planetary motion. By mean of high resolution X-ray spectroscopy with RGS we determine that the corona of this star is unusually dense.

accepted for publication on ApJL

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Cited by in corpus (37)

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• A Detection Of H-alpha In An Exoplanetary Exosphere
• Transit observations of the Hot Jupiter HD 189733b at X-ray wavelengths
• DC Circuit Powered by Orbital Motion: Magnetic Interactions in Compact Object Binaries and Exoplanetary Systems
• Indications for an influence of Hot Jupiters on the rotation and activity of their host stars
• The corona of HD 189733 and its X-ray activity
• A comprehensive statistical assessment of star-planet interaction
• Star-planet magnetic interaction and activity in late-type stars with close-in planets
• An Ultraviolet Investigation of Activity on Exoplanet Host Stars
• Coordinated X-ray and Optical observations of Star-Planet Interaction in HD 17156
• On the detectability of star-planet interaction
• FUV variability of HD 189733. Is the star accreting material from its hot Jupiter?
• No X-rays from WASP-18. Implications for its age, activity, and the influence of its massive hot Jupiter
• Evidence of magnetic star-planet interactions in the HD 189733 system from orbitally-phased Ca II K variations
• MOVES III. Simultaneous X-ray and ultraviolet observations unveiling the variable environment of the hot Jupiter HD 189733b
• Effect of stellar flares on the upper atmospheres of HD 189733b and HD 209458b
• Searching for flaring star-planet interactions in AU Mic TESS observations
• SALT observations of the Chromospheric Activity of Transiting Planet Hosts: Mass Loss and Star Planet Interactions
• Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a planetary companion
• Modeling the Ly$\alpha$ transit absorption of the hot Jupiter HD 189733b
• Time-resolved UVES observations of a stellar flare on the planet host HD 189733 during primary transit
• Close-by planets and flares in their host stars
• The Rise of ROME. I. A Multiwavelength Analysis of the Star-Planet Interaction in the HD 189733 System
• Influence of the Sun-like magnetic cycle on exoplanetary atmospheric escape
• Is the activity level of HD 80606 influenced by its eccentric planet?
• A statistical search for Star-Planet Interaction in the UltraViolet using GALEX
• X-ray variability of HD 189733 across eight years of XMM-Newton observations
• Stellar magnetic activity and Star-Planet Interactions (invited review)
• ROME (Radio Observations of Magnetized Exoplanets). II. HD 189733 Does Not Accrete Significant Material from its Exoplanet like a T Tauri Star from A Disk
• The Young Solar Analogs Project: I. Spectroscopic and Photometric Methods and Multi-year Timescale Spectroscopic Results
• Computation of the transmitted and polarized scattered fluxes by the exoplanet HD 189733b in X-rays
• The X-ray activity of F stars with hot Jupiters: KELT-24 versus WASP-18
• Observational features of exoplanetary synchrotron radio bursts
• Hot Jupiters accreting onto their parent stars: effects on the stellar activity
• Tidal effects on stellar activity