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09 February 2025 |
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Article overview
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TESS Discovery of Twin Planets near 2:1 Resonance around Early M-Dwarf TOI 4342 | Evan Tey
; Chelsea X. Huang
; Michelle Kunimoto
; Andrew Vanderburg
; Avi Shporer
; Samuel N. Quinn
; George Zhou
; Karen A. Collins
; Kevin I. Collins
; Eric L. N. Jensen
; Richard P. Schwarz
; Ramotholo Sefako
; Tianjun Gan
; Elise Furlan
; Crystal L. Gnilka
; Steve B. Howell
; Kathryn V. Lester
; Carl Ziegler
; César Briceño
; Nicholas Law
; Andrew W. Mann
; George R. Ricker
; Roland K. Vanderspek
; David W. Latham
; S. Seager
; Jon M. Jenkins
; Joshua N. Winn
; Douglas A. Caldwell
; David Charbonneau
; Christopher J. Burke
; Zahra Essack
; | Date: |
3 Jan 2023 | Abstract: | With data from the Transiting Exoplanet Survey Satellite (TESS), we showcase
improvements to the MIT Quick-Look Pipeline (QLP) through the discovery and
validation of a multi-planet system around M-dwarf TOI 4342 ($T_{mag}=11.032$,
$M_* = 0.63 M_odot$, $R_* = 0.60 R_odot$, $T_{eff} = 3900$ K, $d = 61.54$
pc). With updates to QLP, including a new multi-planet search, as well as
faster cadence data from TESS’ First Extended Mission, we discovered two
sub-Neptunes ($R_b = 2.266_{-0.038}^{+0.038} R_oplus$ and $R_c =
2.415_{-0.040}^{+0.043} R_oplus$; $P_b$ = 5.538 days and $P_c$ = 10.689 days)
and validated them with ground-based photometry, spectra, and speckle imaging.
Both planets notably have high transmission spectroscopy metrics (TSMs) of 36
and 32, making TOI 4342 one of the best systems for comparative atmospheric
studies. This system demonstrates how improvements to QLP, along with faster
cadence Full-Frame Images (FFIs), can lead to the discovery of new multi-planet
systems. | Source: | arXiv, 2301.01370 | Services: | Forum | Review | PDF | Favorites |
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