2020MNRAS.491.2982E

Query : 2020MNRAS.491.2982E

2020MNRAS.491.2982E - Mon. Not. R. Astron. Soc., 491, 2982-2999 (2020/January-2)

HD 213885b: a transiting 1-d-period super-Earth with an Earth-like composition around a bright (V = 7.9) star unveiled by TESS.

ESPINOZA N., BRAHM R., HENNING T., JORDAN A., DORN C., ROJAS F., SARKIS P., KOSSAKOWSKI D., SCHLECKER M., DIAZ M.R., JENKINS J.S., AGUILERA-GOMEZ C., JENKINS J.M., TWICKEN J.D., COLLINS K.A., LISSAUER J., ARMSTRONG D.J., ADIBEKYAN V., BARRADO D., BARROS S.C.C., BATTLEY M., BAYLISS D., BOUCHY F., BRYANT E.M., COOKE B.F., DEMANGEON O.D.S., DUMUSQUE X., FIGUEIRA P., GILES H., LILLO-BOX J., LOVIS C., NIELSEN L.D., PEPE F., POLLACCO D., SANTOS N.C., SOUSA S.G., UDRY S., WHEATLEY P.J., TURNER O., MARMIER M., SEGRANSAN D., RICKER G., LATHAM D., SEAGER S., WINN J.N., KIELKOPF J.F., HART R., WINGHAM G., JENSEN E.L.N., HELMINIAK K.G., TOKOVININ A., BRICENO C., ZIEGLER C., LAW N.M., MANN A.W., DAYLAN T., DOTY J.P., GUERRERO N., BOYD P., CROSSFIELD I., MORRIS R.L., HENZE C.E. and CHACON A.D.

Abstract (from CDS):

We report the discovery of the 1.008-d, ultrashort period (USP) super-Earth HD 213885b (TOI-141b) orbiting the bright (V = 7.9) star HD 213885 (TOI-141, TIC 403224672), detected using photometry from the recently launched TESS mission. Using FEROS, HARPS, and CORALIE radial velocities, we measure a precise mass of 8.8 ± 0.6 M⊕ for this 1.74 ± 0.05 R⊕ exoplanet, which provides enough information to constrain its bulk composition - similar to Earth's but enriched in iron. The radius, mass, and stellar irradiation of HD 213885b are, given our data, very similar to 55 Cancri e, making this exoplanet a good target to perform comparative exoplanetology of short period, highly irradiated super-Earths. Our precise radial velocities reveal an additional 4.78-d signal which we interpret as arising from a second, non-transiting planet in the system, HD 213885c, whose minimum mass of 19.9 ± 1.4 M⊕ makes it consistent with being a Neptune-mass exoplanet. The HD 213885 system is very interesting from the perspective of future atmospheric characterization, being the second brightest star to host an USP transiting super-Earth (with the brightest star being, in fact, 55 Cancri). Prospects for characterization with present and future observatories are discussed.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: detection - planets and satellites: fundamental parameters - planets and satellites: individual: TOI-141 - TIC 403224672 - HD213885

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 13

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Number of rows : 13
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 * rho01 Cnc e Pl 08 52 35.8111044043 +28 19 50.954994470           ~ 682 1
2 * rho01 Cnc PM* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1223 1
3 Kepler-10b Pl 19 02 43.0613892904 +50 14 28.701617339           ~ 322 1
4 Kepler-78b Pl 19 34 58.0137407208 +44 26 53.960186940           ~ 153 1
5 2MASS J22355219-5952034 * 22 35 52.1987126832 -59 52 03.338224680           ~ 1 0
6 Gaia DR3 6407428891610548736 * 22 35 56.1664755144 -59 52 26.680085292           ~ 1 0
7 HD 213885c Pl 22 35 56.3150949216 -59 51 52.075466892           ~ 4 0
8 HD 213885b Pl 22 35 56.3150949216 -59 51 52.075466892           ~ 47 0
9 HD 213885 PM* 22 35 56.3150949216 -59 51 52.075466892   8.56 7.94     G0/2V 72 0
10 Gaia DR3 6407428925970566272 * 22 35 59.4416582712 -59 51 43.671406968           ~ 1 0
11 2MASS J22360031-5952070 * 22 36 00.3284087640 -59 52 06.984652980           ~ 1 0
12 Gaia DR3 6407434801486912768 * 22 36 00.6008263056 -59 51 32.602147452           ~ 1 0
13 K2-141b Pl 23 23 39.9709098120 -01 11 21.448681332           ~ 104 0

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