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2024RNAAS...8..274A - Research Notes of the AAS, 8, 274 (2024/October-0)

Updated Forecast for TRAPPIST-1 Times of Transit for All Seven Exoplanets Incorporating JWST Data.

AGOL E., ALLEN N.H., BENNEKE B., DELREZ L., DOYON R., DUCROT E., ESPINOZA N., GRESSIER A., LAFRENIERE D., LIM O., LUSTIG-YAEGER J., PIAULET-GHORAYEB C., RADICA M., RUSTAMKULOV Z. and SOTZEN K.S.

Abstract (from CDS):

The TRAPPIST-1 system has been extensively observed with JWST in the near-infrared with the goal of detecting atmospheric transit transmission spectra of these temperate, Earth-sized exoplanets. A byproduct has been much more precise times of transit compared with prior available data from Spitzer, Hubble Space Telescope, 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 uncertainties ranging from 7 to 105 s during JWST Cycles 4 and 5. This forecast will help to improve planning of future observations of the TRAPPIST-1 planets, while we postpone a full dynamical analysis to future work.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet systems - Exoplanet dynamics - Transit timing variation method - James Webb Space Telescope

Simbad objects: 2

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