English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a 5A-100um Spectral Energy Distribution (SED) of the ultracooldwarf star TRAPPIST-1, obtained as part of the Mega-MUSCLES Treasury Survey.The SED combines ultraviolet and blue-optical spectroscopy obtained with theHubble Space Telescope, X-ray spectroscopy obtained with XMM-Newton, and modelsof the stellar photosphere, chromosphere, transition region and corona. A newDifferential Emission Measure model of the unobserved extreme-ultravioletspectrum is provided, improving on the Lyman alpha to EUV relations often usedto estimate the 100-911A flux from low-mass stars. We describe the observationsand models used, as well as the recipe for combining them into an SED. We alsoprovide a semi-empirical, noise-free model of the stellar ultraviolet spectrumbased on our observations for use in atmospheric modelling of the TRAPPIST-1planets.

The Mega-MUSCLES Spectral Energy Distribution Of TRAPPIST-1