2019ApJ...875L...7D

Query : 2019ApJ...875L...7D

2019ApJ...875L...7D - Astrophys. J., 875, L7-L7 (2019/April-3)

TESS delivers its first Earth-sized planet and a warm sub-Neptune.

DRAGOMIR D., TESKE J., GUNTHER M.N., SEGRANSAN D., BURT J.A., HUANG C.X., VANDERBURG A., MATTHEWS E., DUMUSQUE X., STASSUN K.G., PEPPER J., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., BEATTY T., BOUCHY F., BROWN T.M., BUTLER R.P., CIARDI D.R., CRANE J.D., EASTMAN J.D., FOSSATI L., FRANCIS J., FULTON B.J., GAUDI B.S., GOEKE R.F., JAMES D., KLAUS T.C., KUHN R.B., LOVIS C., LUND M.B., McDERMOTT S., PAEGERT M., PEPE F., RODRIGUEZ J.E., SHA L., SHECTMAN S.A., SHPORER A., SIVERD R.J., GARCIA SOTO A., STEVENS D.J., TWICKEN J.D., UDRY S., VILLANUEVA S., WANG S.X., WOHLER B., YAO X. and ZHAN Z.

Abstract (from CDS):

The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be 2.61–0.16+0.17R⊕, and combined archival and follow-up precision radial velocity data put the mass of the planet at 22.7–1.9+2.2M⊕. HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R⊕ with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized (Rp=0.892–0.058+0.064R⊕) planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi-planet systems.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): planetary systems - planets and satellites: detection - stars: individual: (HD 21749, TIC 279741379)

Simbad objects: 9

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Number of rows : 9
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 CD-63 111 * 03 26 57.9148156128 -63 30 16.979089428   10.10 9.45     ~ 13 0
2 HD 21749 PM* 03 26 59.2226447548 -63 29 56.762928961 10.446 9.302 8.143 7.43 6.865 K4.5V 133 1
3 HD 21749b Pl 03 26 59.2226447548 -63 29 56.762928961           ~ 49 0
4 HD 21749c Pl 03 26 59.2226447548 -63 29 56.762928961           ~ 14 0
5 * pi. Men c Pl 05 37 09.8868446714 -80 28 08.834553264           ~ 117 0
6 HD 97658b Pl 11 14 33.1612754184 +25 42 37.390358520           ~ 234 1
7 K2-66b Pl 22 06 06.4020754080 -10 42 41.421424716           ~ 23 0
8 NAME L 119-213b Pl 22 41 58.1171811377 -69 10 08.320741850           ~ 146 0
9 HD 219134c Pl 23 13 16.9749603608 +57 10 06.083823619           ~ 73 0

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