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TESS reveals HD118203 b transits after 13 years

11 Feb 2020, 17:00 UTC
TESS reveals HD118203 b transits after 13 years
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Editor’s note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we occasionally repost astrobites content here at AAS Nova. We hope you enjoy this post from astrobites; the original can be viewed at astrobites.org.
Title: TESS Reveals HD 118203 b to be a Transiting Planet
Authors: Joshua Pepper, Stephen R. Kane, Joseph E. Rodriguez et al
First Author’s Institution: Lehigh University
Status: Submitted to AJ
There are multiple ways to discover an exoplanet. The first exoplanet around a solar-type star was discovered by radial velocity measurements and earned the discoverers this year’s Nobel Prize. After the advent of wide-field exoplanet surveys, from SuperWASP starting in 2006 to NGTS and TESS, most exoplanets have been discovered using the transit method and confirmed soon after by radial-velocity studies. However, the exoplanet in today’s article, HD118203 b, was detected by radial velocity back in 2006 and has only now been found to transit, 13 years after its discovery.
Radial-Velocity Discovery
HD118203 b was found in 2006 by using the radial-velocity technique: measuring the amount the star’s spectrum ‘wobbles’ as the star is tugged by its orbiting planet. Over one ...

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