Frequent Flaring in the TRAPPIST-1 System—Unsuited for Life?
@article{Vida2017FrequentFI,
title={Frequent Flaring in the TRAPPIST-1 System—Unsuited for Life?},
author={Kriszti{\'a}n Vida and Zs. KHov'ari and Andr'as P'al and Katalin Ol'ah and Levente Kriskovics},
journal={The Astrophysical Journal},
year={2017},
volume={841},
url={https://api.semanticscholar.org/CorpusID:118827117}
}We analyze the K2 light curve of the TRAPPIST-1 system. The Fourier analysis of the data suggests Prot = 3.295 ± 0.003 days. The light curve shows several flares, of which we analyzed 42 events with integrated flare energies of 1.26 × 1030–1.24 × 1033 erg. Approximately 12% of the flares were complex, multi-peaked eruptions. The flaring and the possible rotational modulation shows no obvious correlation. The flaring activity of TRAPPIST-1 probably continuously alters the atmospheres of the…
128 Citations
Flares on TRAPPIST-1 Reveal the Spectrum of Magnetic Features on Its Surface
- 2025
Physics
TRAPPIST-1 is an M8 dwarf hosting seven known exoplanets and is currently one of the most frequently observed targets of the James Webb Space Telescope (JWST). However, it is notoriously active, and…
Activity of TRAPPIST–1 analog stars observed with TESS
- 2021
Physics
As more exoplanets are being discovered around ultracool dwarfs, understanding their magnetic activity and the implications for habitability is of prime importance. To find stellar flares and…
Possible Bright Starspots on TRAPPIST-1
- 2018
Physics
The M8V star TRAPPIST-1 hosts seven roughly Earth-sized planets and is a promising target for exoplanet characterization. Kepler/K2 Campaign 12 observations of TRAPPIST-1 in the optical show an…
Activity of the M8 Dwarf TRAPPIST-1
- 2018
Physics
The results of an analysis of observations of the cool (M8) dwarf TRAPPIST-1 obtained on the Kepler Space Telescope (the K2 continuation mission) are presented. TRAPPIST-1 possesses a planetary…
Evryscope and K2 Constraints on TRAPPIST-1 Superflare Occurrence and Planetary Habitability
- 2020
Physics
The nearby ultracool dwarf TRAPPIST-1 possesses several Earth-sized terrestrial planets, three of which have equilibrium temperatures that may support liquid surface water, making it a compelling…
Flaring Activity of Proxima Centauri from TESS Observations: Quasiperiodic Oscillations during Flare Decay and Inferences on the Habitability of Proxima b
- 2019
Physics
We analyze the light curve of the M5.5 dwarf Proxima Centauri obtained by the Transiting Exoplanet Survey Satellite (TESS) in Sectors 11 and 12. In the ≈50 day long light curve we identified and…
Confirmation of a Dynamical Model for the TRAPPIST-1 Exoplanetary System
- 2021
Physics
We present a new transit of TRAPPIST-1 d from 2021 August 25. The measured mid-point of this transit agrees with the prediction from a recently published dynamical model for the TRAPPIST-1 system and…
On the Age of the TRAPPIST-1 System
- 2017
Physics
The nearby (d = 12 pc) M8 dwarf star TRAPPIST-1 (2MASS J23062928−0502285) hosts a compact system of at least seven exoplanets with sizes similar to Earth. Given its importance for testing planet…
EvryFlare. iv. Detection of Periodicity in Flare Occurrence from Cool Stars with TESS
- 2021
Physics
Phased flaring, or the periodic occurrence of stellar flares, may probe electromagnetic star−planet interaction (SPI), binary interaction, or magnetic conditions in spots. For the first time, we…
A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1
- 2019
Physics
We present the distance-calibrated spectral energy distribution (SED) of TRAPPIST-1 using a new medium-resolution (R ∼ 6000) near-infrared (NIR) Folded-port InfraRed Echellette (FIRE) spectrum and…
39 References
Reconnaissance of the TRAPPIST-1 exoplanet system in the Lyman-α line
- 2017
Physics
The TRAPPIST-1 system offers the opportunity to characterize terrestrial, potentially habitable planets orbiting a nearby ultracool dwarf star. We performed a four-orbit reconnaissance with the Space…
Optical flares from the faint mid-dM star 2MASS J00453912+4140395
- 2007
Physics
We present B and V light curves of a large stellar flare obtained with the Wide Field Camera at the Isaac Newton 2.5-m telescope (La Palma). The source object is a faint (mV = 21.38) foreground star…
KEPLER FLARES. II. THE TEMPORAL MORPHOLOGY OF WHITE-LIGHT FLARES ON GJ 1243
- 2014
Physics
We present the largest sample of flares ever compiled for a single M dwarf, the active M4 star GJ 1243. Over 6100 individual flare events, with energies ranging from 1029 to 1033 erg, are found in 11…
A seven-planet resonant chain in TRAPPIST-1
- 2017
Physics
The TRAPPIST-1 system is the first transiting planet system found orbiting an ultracool dwarf star1. At least seven planets similar in radius to Earth were previously found to transit this host…
Rotational modulation of the photospheric and chromospheric activity in the young, single K2-dwarf PW And ?;??
- 2003
Physics
The young active star PW And (HID 1405), has been studied using echelle spectra from eight observing runs carried out during the period 1999 – 2001. The cross correlation function (CCF) technique has…
KEPLER FLARES. IV. A COMPREHENSIVE ANALYSIS OF THE ACTIVITY OF THE dM4e STAR GJ 1243
- 2016
Physics
We present a comprehensive study of the active dM4e star GJ 1243. We use previous observations and ground-based echelle spectroscopy to determine that GJ 1243 is a member of the Argus association of…
UV surface habitability of the TRAPPIST-1 system
- 2017
Physics, Environmental Science
With the discovery of rocky planets in the temperate habitable zone (HZ) of the close-by cool star TRAPPIST-1 the question of whether such planets could harbour life arises. Habitable planets around…
MOST OBSERVATIONS OF OUR NEAREST NEIGHBOR: FLARES ON PROXIMA CENTAURI
- 2016
Physics
We present a study of white-light flares from the active M5.5 dwarf Proxima Centauri using the Canadian microsatellite Microvariability and Oscillations of STars. Using 37.6 days of monitoring data…
INFLUENCE OF STELLAR FLARES ON THE CHEMICAL COMPOSITION OF EXOPLANETS AND SPECTRA
- 2016
Physics, Chemistry
More than three thousand exoplanets have been detected so far, and more and more spectroscopic observations of exoplanets are performed. Future instruments (James Webb Space Telescope (JWST), E-ELT,…
GLOBAL ENERGETICS OF SOLAR FLARES. III. NONTHERMAL ENERGIES
- 2015
Physics
This study entails the third part of a global flare energetics project, in which Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) data of 191 M and X-class flare events from the first 3.5 years…