2020AJ....160..116G

Query : 2020AJ....160..116G

2020AJ....160..116G - Astron. J., 160, 116-116 (2020/September-0)

The first habitable-zone Earth-sized planet from TESS. I. Validation of the TOI-700 system.

GILBERT E.A., BARCLAY T., SCHLIEDER J.E., QUINTANA E.V., HORD B.J., KOSTOV V.B., LOPEZ E.D., ROWE J.F., HOFFMAN K., WALKOWICZ L.M., SILVERSTEIN M.L., RODRIGUEZ J.E., VANDERBURG A., SUISSA G., AIRAPETIAN V.S., CLEMENT M.S., RAYMOND S.N., MANN A.W., KRUSE E., LISSAUER J.J., COLON K.D., KOPPARAPU R.K., KREIDBERG L., ZIEBA S., COLLINS K.A., QUINN S.N., HOWELL S.B., ZIEGLER C., VRIJMOET E.H., ADAMS F.C., ARNEY G.N., BOYD P.T., BRANDE J., BURKE C.J., CACCIAPUOTI L., CHANCE Q., CHRISTIANSEN J.L., COVONE G., DAYLAN T., DINEEN D., DRESSING C.D., ESSACK Z., FAUCHEZ T.J., GALGANO B., HOWE A.R., KALTENEGGER L., KANE S.R., LAM C., LEE E.J., LEWIS N.K., LOGSDON S.E., MANDELL A.M., MONSUE T., MULLALLY F., MULLALLY S.E., PAUDEL R.R., PIDHORODETSKA D., PLAVCHAN P., REYES N.T., RINEHART S.A., ROJAS-AYALA B., SMITH J.C., STASSUN K.G., TENENBAUM P., VEGA L.D., VILLANUEVA G.L., WOLF E.T., YOUNGBLOOD A., RICKER G.R., VANDERSPEK R.K., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., BAKOS G.A., BRICENO C., CIARDI D.R., CLOUTIER R., CONTI D.M., COUPERUS A., DI SORA M., EISNER N.L., EVERETT M.E., GAN T., HARTMAN J.D., HENRY T., ISOPI G., JAO W.-C., JENSEN E.L.N., LAW N., MALLIA F., MATSON R.A., SHAPPEE B.J., LE WOOD M. and WINTERS J.G.

Abstract (from CDS):

We present the discovery and validation of a three-planet system orbiting the nearby (31.1 pc) M2 dwarf star TOI-700 (TIC 150428135). TOI-700 lies in the TESS continuous viewing zone in the Southern Ecliptic Hemisphere; observations spanning 11 sectors reveal three planets with radii ranging from 1 R⊕ to 2.6 R⊕ and orbital periods ranging from 9.98 to 37.43 days. Ground-based follow-up combined with diagnostic vetting and validation tests enables us to rule out common astrophysical false-positive scenarios and validate the system of planets. The outermost planet, TOI-700 d, has a radius of 1.19 ± 0.11 R⊕ and resides within a conservative estimate of the host star's habitable zone, where it receives a flux from its star that is approximately 86% of Earth's insolation. In contrast to some other low-mass stars that host Earth-sized planets in their habitable zones, TOI-700 exhibits low levels of stellar activity, presenting a valuable opportunity to study potentially rocky planets over a wide range of conditions affecting atmospheric escape. While atmospheric characterization of TOI-700 d with the James Webb Space Telescope (JWST) will be challenging, the larger sub-Neptune, TOI-700 c (R = 2.63 R⊕), will be an excellent target for JWST and future space-based observatories. TESS is scheduled to once again observe the Southern Hemisphere, and it will monitor TOI-700 for an additional 11 sectors in its extended mission. These observations should allow further constraints on the known planet parameters and searches for additional planets and transit timing variations in the system.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet systems - Transit photometry - Low mass stars - M dwarf stars - Astronomy data analysis

Simbad objects: 34

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Number of rows : 34
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 BD-17 588A PM* 03 01 51.3936681048 -16 35 36.031178525 13.444 12.191 10.529 9.364 7.887 M3V 113 0
2 NAME L 231-32b Pl 04 33 39.7200127728 -51 57 22.435373160           ~ 49 0
3 NAME L 231-32c Pl 04 33 39.7200127728 -51 57 22.435373160           ~ 45 0
4 NAME L 231-32d Pl 04 33 39.7200127728 -51 57 22.435373160           ~ 128 0
5 TOI-700 PM* 06 28 23.2285331376 -65 34 45.520447908   14.524 13.076 12.659 10.70 M2V 84 0
6 TOI-700d Pl 06 28 23.2285331376 -65 34 45.520447908           ~ 64 0
7 TOI-700c Pl 06 28 23.2285331376 -65 34 45.520447908           ~ 17 0
8 TOI-700b Pl 06 28 23.2285331376 -65 34 45.520447908           ~ 18 0
9 NAME L 98-59 b Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 67 0
10 L 98-59 PM* 08 18 07.6214406393 -68 18 46.805365587   13.22 11.685 11.294 9.25 M3V 135 0
11 NAME L 98-59 d Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 98 0
12 NAME L 98-59 c Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 86 0
13 NAME L 678-39b Pl 09 36 01.6372169407 -21 39 38.877606712           ~ 86 0
14 NAME G 162-44c Pl 10 18 35.1372361341 -11 43 00.243355403           ~ 50 0
15 NAME G 162-44b Pl 10 18 35.1372361341 -11 43 00.243355403           ~ 44 0
16 NAME LP 791-18c Pl 11 02 45.9546199392 -16 24 22.288196376           ~ 25 0
17 NAME LP 791-18b Pl 11 02 45.9546199392 -16 24 22.288196376           ~ 21 0
18 NAME Proxima Centauri PM* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1483 0
19 NAME Proxima Centauri b Pl 14 29 42.9461331854 -62 40 46.164680672           ~ 445 0
20 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 907 2
21 Kepler-62f Pl 18 52 51.0518497680 +45 20 59.399622996           ~ 88 1
22 Kepler-442b Pl 19 01 27.9742961064 +39 16 48.224136216           ~ 50 0
23 KOI-2418.01 Pl 19 49 56.8076265768 +46 59 48.103495728           ~ 54 0
24 Kepler-186 Er* 19 54 36.6535147488 +43 57 18.025920324   16.731 15.290 14.833   M1V 151 0
25 Kepler-186f Pl 19 54 36.6535147488 +43 57 18.025920324           ~ 94 0
26 LP 759-72 LM* 22 18 29.2548547872 -09 36 44.381088036     15.04     M2V 42 0
27 NAME LP 759-72e Pl 22 18 29.2548547872 -09 36 44.381088036           ~ 22 0
28 NAME L 119-213b Pl 22 41 58.1171811377 -69 10 08.320741850           ~ 146 0
29 TRAPPIST-1h Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 162 0
30 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 1306 0
31 TRAPPIST-1e Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 384 0
32 TRAPPIST-1d Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 263 0
33 TRAPPIST-1f Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 281 0
34 TRAPPIST-1g Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 237 0

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