2023AJ....165...93T

Query : 2023AJ....165...93T

2023AJ....165...93T - Astron. J., 165, 93 (2023/March-0)

TESS Discovery of Twin Planets near 2:1 Resonance around Early M Dwarf TOI 4342.

TEY E., HUANG C.X., KUNIMOTO M., VANDERBURG A., SHPORER A., QUINN S.N., ZHOU G., COLLINS K.A., COLLINS K.I., JENSEN E.L.N., SCHWARZ R.P., SEFAKO R., GAN T., FURLAN E., GNILKA C.L., HOWELL S.B., LESTER K.V., ZIEGLER C., BRICENO C., LAW N., MANN A.W., RICKER G.R., VANDERSPEK R.K., LATHAM D.W., SEAGER S., JENKINS J.M., WINN J.N., CALDWELL D.A., CHARBONNEAU D., BURKE C.J. and ESSACK Z.

Abstract (from CDS):

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 multiplanet system around M dwarf TOI 4342 (Tmag = 11.032, M⋆ = 0.63 M⊙, R⋆ = 0.60 R⊙, Teff = 3900 K, d = 61.54 pc). With updates to QLP, including a new multiplanet search, as well as faster cadence data from TESS's First Extended Mission, we discovered two sub-Neptunes (${R}_{b}={2.266}_{-0.038}^{+0.038}$R⊕ and ${R}_{c}={2.415}_{-0.040}^{+0.043}$R⊕; Pb = 5.538 days and Pc = 10.689 days) and validated them with ground-based photometry, spectra, and speckle imaging. Both planets notably have high transmission spectroscopy metrics 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, can lead to the discovery of new multiplanet systems.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy - Transit photometry - M dwarf stars

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 L 231-32 PM* 04 33 39.7200127728 -51 57 22.435373160     12.617 12.147   M3.0V 83 0
2 TOI-700 PM* 06 28 23.2285331376 -65 34 45.520447908   14.524 13.076 12.659 10.70 M2V 84 0
3 L 98-59 PM* 08 18 07.6214406393 -68 18 46.805365587   13.22 11.685 11.294 9.25 M3V 135 0
4 TOI-4342b Pl 21 37 32.8637131777 -77 58 43.510170538           ~ 3 0
5 TOI-4342 PM* 21 37 32.8637131777 -77 58 43.510170538           ~ 12 0
6 TOI-4342c Pl 21 37 32.8637131777 -77 58 43.510170538           ~ 3 0
7 Gaia DR3 6355915496244712832 * 21 37 38.8170600402 -77 58 46.423356615           ~ 1 0

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