학술논문
TESS Discovery of Twin Planets near 2:1 Resonance around Early M-Dwarf TOI 4342
Document Type
Working Paper
Author
Tey, Evan; Huang, Chelsea X.; Kunimoto, Michelle; Vanderburg, Andrew; Shporer, Avi; Quinn, Samuel N.; Zhou, George; Collins, Karen A.; Collins, Kevin I.; Jensen, Eric L. N.; Schwarz, Richard P.; Sefako, Ramotholo; Gan, Tianjun; Furlan, Elise; Gnilka, Crystal L.; Howell, Steve B.; Lester, Kathryn V.; Ziegler, Carl; Briceño, César; Law, Nicholas; Mann, Andrew W.; Ricker, George R.; Vanderspek, Roland K.; Latham, David W.; Seager, S.; Jenkins, Jon M.; Winn, Joshua N.; Caldwell, Douglas A.; Charbonneau, David; Burke, Christopher J.; Essack, Zahra
Source
Subject
Language
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.
Comment: accepted for publication in AJ
Comment: accepted for publication in AJ