2018A&A...619L..10G


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET03:36:50

2018A&A...619L..10G - Astronomy and Astrophysics, volume 619, L10-10 (2018/11-1)

TESS's first planet. A super-Earth transiting the naked-eye star π Mensae.

GANDOLFI D., BARRAGAN O., LIVINGSTON J.H., FRIDLUND M., JUSTESEN A.B., REDFIELD S., FOSSATI L., MATHUR S., GRZIWA S., CABRERA J., GARCIA R.A., PERSSON C.M., VAN EYLEN V., HATZES A.P., HIDALGO D., ALBRECHT S., BUGNET L., COCHRAN W.D., CSIZMADIA S., DEEG H., EIGMULLER P., ENDL M., ERIKSON A., ESPOSITO M., GUENTHER E., KORTH J., LUQUE R., MONTANES RODRIGUEZ P., NESPRAL D., NOWAK G., PATZOLD M. and PRIETO-ARRANZ J.

Abstract (from CDS):

We report on the confirmation and mass determination of π Men c, the first transiting planet discovered by NASA's TESS space mission. π Men is a naked-eye (V=5.65mag), quiet G0 V star that was previously known to host a sub-stellar companion (π Men b) on a longperiod (Porb=2091-days), eccentric (e=0.64) orbit. Using TESS time-series photometry, combined with Gaia data, published UCLES at AAT Doppler measurements, and archival HARPS at ESO-3.6m radial velocities, we found that π Men c is a close-in planet with an orbital period of Porb=6.27-days, a mass of Mc=4.52±0.81 M, and a radius of Rc=2.06±0.03 R. Based on the planet's orbital period and size, π Men c is a super-Earth located at, or close to, the radius gap, while its mass and bulk density suggest it may have held on to a significant atmosphere. Because of the brightness of the host star, this system is highly suitable for a wide range of further studies to characterize the planetary atmosphere and dynamical properties. We also performed an asteroseismic analysis of the TESS data and detected a hint of power excess consistent with the seismic values expected for this star, although this result depends on the photometric aperture used to extract the light curve. This marginal detection is expected from pre-launch simulations hinting at the asteroseismic potential of the TESS mission for longer, multi-sector observations and/or for more evolved bright stars.

Abstract Copyright: © ESO 2018

Journal keyword(s): planetary systems - planets and satellites: detection - planets and satellites: fundamental parameters - planets and satellites: terrestrial planets - stars: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/619/L10): tablea1.dat tablea3.dat (tablea2.dat not supplied)

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * pi. Men c Pl 05 37 09.8851202601 -80 28 08.831347245           ~ 35 0
2 * pi. Men PM* 05 37 09.8851202601 -80 28 08.831347245   6.25 5.67     G0V 257 1
3 * pi. Men b Pl 05 37 09.8851202601 -80 28 08.831347245           ~ 52 1
4 Gaia DR2 4623036143819289344 PM* 05 37 59.2588935238 -80 27 59.511967197           ~ 1 0
5 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 429 1
6 G 139-21 PM* 17 15 18.9337265994 +04 57 50.064695682       14.394   M4.5V 253 1
7 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 565 1
8 Kepler-42c Pl 19 28 52.5687991194 +44 37 08.990276298           ~ 41 1
9 TRAPPIST-1b Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 135 0
10 TRAPPIST-1 LM* 23 06 29.3684052886 -05 02 29.031690445     18.798 16.466 14.024 M7.5e 567 0
11 TRAPPIST-1e Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 151 0
12 HD 219134b Pl 23 13 16.9747821012 +57 10 06.076520993           ~ 66 0

    Equat.    Gal    SGal    Ecl

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