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https://github.com/bmorris3/trappist-flares

messing about with Trappist 1 & K2

https://github.com/bmorris3/trappist-flares

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messing about with Trappist 1 & K2

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  • Host: GitHub
  • Owner: bmorris3
  • License: mit
  • Language: Jupyter Notebook
  • Default Branch: master
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Fork of jradavenport/trappist-flares
Created about 8 years ago · Last pushed over 8 years ago

https://github.com/bmorris3/trappist-flares/blob/master/ 

# Flares from TRAPPIST-1 with K2

[![DOI](https://zenodo.org/badge/84344689.svg)](https://zenodo.org/badge/latestdoi/84344689)

By James Davenport (@jradavenport), Rishi Paudel, and John Gizis (@jgizis)


This is an IPython notebook exploration of the raw K2 light curves released for TRAPPIST-1, and is listed on the [MAST page](https://archive.stsci.edu/k2/trappist1/) for this target as a useful guide finding and studying flares in the light curve.

Flares in this work were identified by manual inspection of the light curve using [FBEYE](https://github.com/jradavenport/FBEYE) from [Davenport et al. (2014)](http://arxiv.org/abs/1411.3723).

The largest flare, first identified by Tom Barclay (@mrtommyb) on Twitter a couple hours after the data were made public, is a large amplitude, "complex" event.
![](flare_32.png)

A majority of the flares are between 20 and 40 minutes in total duration, comparable to the most active stars observed in the Kepler mission.
![](E_vs_Dur.png)

Note [Vida et al (2017)](https://arxiv.org/abs/1703.10130) have reproduced these results, but use a different quiescent energy level. Our "equivalent durations" are converted to energies using the zeropoint calculated as in [Gizis et al. (2017)](https://arxiv.org/abs/1703.08745) assuming a 10,000 K blackbody for the flare spectrum.
![](FlareStar_trappist1.png)


This notebook made the first flare frequency distribution measurement for this star, which indicated a "superflare"-like event occurs on TRAPPIST-1 approximately once per year. While this is lower than the rate for Proxima Cen [(Davenport et al. 2016)](https://arxiv.org/abs/1608.06672), it may still be a high enough occurrence rate to strip the atmosphere from any of the 3 potentially habitable orbiting planets.
![](trappist_flares.png)

Owner

  • Name: Brett M. Morris
  • Login: bmorris3
  • Kind: user
  • Location: Baltimore, MD
  • Company: @SpaceTelescope

Software engineer & astronomer.

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