2019AJ....158...32K


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET17:40:10

2019AJ....158...32K - Astron. J., 158, 32-32 (2019/July-0)

The L 98-59 system: three transiting, terrestrial-size planets orbiting a nearby M dwarf.

KOSTOV V.B., SCHLIEDER J.E., BARCLAY T., QUINTANA E.V., COLON K.D., BRANDE J., COLLINS K.A., FEINSTEIN A.D., HADDEN S., KANE S.R., KREIDBERG L., KRUSE E., LAM C., MATTHEWS E., MONTET B.T., POZUELOS F.J., STASSUN K.G., WINTERS J.G., RICKER G., VANDERSPEK R., LATHAM D., SEAGER S., WINN J., JENKINS J.M., AFANASEV D., ARMSTRONG J.J.D., ARNEY G., BOYD P., BARENTSEN G., BARKAOUI K., BATALHA N.E., BEICHMAN C., BAYLISS D., BURKE C., BURDANOV A., CACCIAPUOTI L., CARSON A., CHARBONNEAU D., CHRISTIANSEN J., CIARDI D., CLAMPIN M., COLLINS K.I., CONTI D.M., COUGHLIN J., COVONE G., CROSSFIELD I., DELREZ L., DOMAGAL-GOLDMAN S., DRESSING C., DUCROT E., ESSACK Z., EVERETT M.E., FAUCHEZ T., FOREMAN-MACKEY D., GAN T., GILBERT E., GILLON M., GONZALES E., HAMANN A., HEDGES C., HOCUTT H., HOFFMAN K., HORCH E.P., HORNE K., HOWELL S., HYNES S., IRELAND M., IRWIN J.M., ISOPI G., JENSEN E.L.N., JEHIN E., KALTENEGGER L., KIELKOPF J.F., KOPPARAPU R., LEWIS N., LOPEZ E., LISSAUER J.J., MANN A.W., MALLIA F., MANDELL A., MATSON R.A., MAZEH T., MONSUE T., MORAN S.E., MORAN V., MORLEY C.V., MORRIS B., MUIRHEAD P., MUKAI K., MULLALLY S., MULLALLY F., MURRAY C., NARITA N., PALLE E., PIDHORODETSKA D., QUINN D., RELLES H., RINEHART S., RITSKO M., RODRIGUEZ J.E., ROWDEN P., ROWE J.F., SEBASTIAN D., SEFAKO R., SHAHAF S., SHPORER A., REYES N.T., TENENBAUM P., TING E.B., TWICKEN J.D., VAN BELLE G.T., VEGA L., VOLOSIN J., WALKOWICZ L.M. and YOUNGBLOOD A.

Abstract (from CDS):

We report the Transiting Exoplanet Survey Satellite (TESS) discovery of three terrestrial-size planets transiting L 98-59 (TOI-175, TIC 307210830)-a bright M dwarf at a distance of 10.6 pc. Using the Gaia-measured distance and broadband photometry, we find that the host star is an M3 dwarf. Combined with the TESS transits from three sectors, the corresponding stellar parameters yield planet radii ranging from 0.8 R to 1.6 R. All three planets have short orbital periods, ranging from 2.25 to 7.45 days with the outer pair just wide of a 2:1 period resonance. Diagnostic tests produced by the TESS Data Validation Report and the vetting package DAVE rule out common false-positive sources. These analyses, along with dedicated follow-up and the multiplicity of the system, lend confidence that the observed signals are caused by planets transiting L 98-59 and are not associated with other sources in the field. The L 98-59 system is interesting for a number of reasons: the host star is bright (V = 11.7 mag, K = 7.1 mag) and the planets are prime targets for further follow-up observations including precision radial-velocity mass measurements and future transit spectroscopy with the James Webb Space Telescope; the near-resonant configuration makes the system a laboratory to study planetary system dynamical evolution; and three planets of relatively similar size in the same system present an opportunity to study terrestrial planets where other variables (age, metallicity, etc.) can be held constant. L 98-59 will be observed in four more TESS sectors, which will provide a wealth of information on the three currently known planets and have the potential to reveal additional planets in the system.

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

Journal keyword(s): planets and satellites: detection - stars: individual: (TIC 307210830, TOI-175) - techniques: photometric

Status in Simbad:  being processed

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 UCAC4 109-016501 EB* 08 17 58.1211588925 -68 17 46.043556080   15.49 14.46 14.23   ~ 1 0
2 L 98-59 PM* 08 18 07.6215096918 -68 18 46.799548510   13.22 11.685 11.294   M2 12 0
3 NAME L 98-59 d Pl? 08 18 07.6215096918 -68 18 46.799548510           ~ 2 0
4 NAME L 98-59 b Pl? 08 18 07.6215096918 -68 18 46.799548510           ~ 2 0
5 NAME L 98-59 c Pl? 08 18 07.6215096918 -68 18 46.799548510           ~ 2 0
6 2MASS J08181129-6819373 EB* 08 18 11.29104 -68 19 37.3764           ~ 1 0
7 2MASS J08181825-6818430 EB* 08 18 18.25344 -68 18 43.0236           ~ 1 0
8 HD 72337 * 08 27 16.7555217013 -70 05 36.537693299   5.483 5.507     A0V 25 0
9 L 320-124 PM* 10 14 51.7783473599 -47 09 24.189733387   15.25 13.52 13.067   M4 54 0
10 GJ 1132 b Pl? 10 14 51.8945 -47 09 24.647           ~ 66 0
11 NAME Proxima b Pl? 14 29 42.94853 -62 40 46.1631           ~ 157 0
12 BD-07 4003b Pl 15 19 26.8269 -07 43 20.189           ~ 73 1
13 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 627 2
14 Kepler-296 ** 19 06 09.572976 +49 26 14.54424           M2V 65 3
15 KOI-571 Ro* 19 54 36.6536205214 +43 57 18.025893926           M1V 90 3
16 TRAPPIST-1 PM* 23 06 29.3684052886 -05 02 29.031690445     18.798 16.466 14.024 M8 369 0

    Equat.    Gal    SGal    Ecl

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2019.11.17-17:40:10

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