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09 February 2025
 
  » arxiv » 2301.01370

 Article overview



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
AbstractWith 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
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