Updated Forecast For TRAPPIST-1 Times Of Transit For All Seven Exoplanets Incorporating JWST Data
The TRAPPIST-1 system has been extensively observed with JWST in the near-infrared with the goal of measuring atmospheric transit transmission spectra of these temperate, Earth-sized exoplanets.
A byproduct of these observations has been much more precise times of transit compared with prior available data from Spitzer, HST, or ground-based telescopes. In this note we use 23 new timing measurements of all seven planets in the near-infrared from five JWST observing programs to better forecast and constrain the future times of transit in this system.
In particular, we note that the transit times of TRAPPIST-1h have drifted significantly from a prior published analysis by up to tens of minutes. Our newer forecast has a higher precision, with median statistical uncertainties ranging from 7-105 seconds during JWST Cycles 4 and 5.
Our expectation is that this forecast will help to improve planning of future observations of the TRAPPIST-1 planets, whereas we postpone a full dynamical analysis to future work.
Eric Agol, Natalie H. Allen, Björn Benneke, Laetitia Delrez, René Doyon, Elsa Ducrot, Néstor Espinoza, Amélie Gressier, David Lafrenière, Olivia Lim, Jacob Lustig-Yaeger, Caroline Piaulet-Ghorayeb, Michael Radica, Zafar Rustamkulov, Kristin S. Sotzen
Comments: Submitted to AAS journals, 4 pages, 1 figure
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2409.11620 [astro-ph.EP] (or arXiv:2409.11620v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2409.11620
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Submission history
From: Eric Agol
[v1] Wed, 18 Sep 2024 00:51:17 UTC (486 KB)
https://arxiv.org/abs/2409.11620
Astrobiology,
