2018A&A...612A..41S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET09:33:08

2018A&A...612A..41S - Astronomy and Astrophysics, volume 612A, 41-41 (2018/4-1)

The RoPES project with HARPS and HARPS-N. I. A system of super-Earths orbiting the moderately active K-dwarf HD 176986.

SUAREZ MASCARENO A., GONZALEZ HERNANDEZ J.I., REBOLO R., VELASCO S., TOLEDO-PADRON B., UDRY S., MOTALEBI F., SEGRASAN D., WYTTENBACH A., MAYOR M., PEPE F., LOVIS C., SANTOS N.C., FIGUEIRA P. and ESPOSITO M.

Abstract (from CDS):

We report the discovery of a system of two super-Earths orbiting the moderately active K-dwarf HD 176986. This work is part of the RoPES RV program of G- and K-type stars, which combines radial velocities (RVs) from the HARPS and HARPS-N spectrographs to search for short-period terrestrial planets. HD 176986 b and c are super-Earth planets with masses of 5.74 and 9.18M, orbital periods of 6.49 and 16.82 days, and distances of 0.063 and 0.119AU in orbits that are consistent with circular. The host star is a K2.5 dwarf, and despite its modest level of chromospheric activity (log10(RHK')=-4.90±0.04), it shows a complex activity pattern. Along with the discovery of the planets, we study the magnetic cycle and rotation of the star. HD 176986 proves to be suitable for testing the available RV analysis technique and further our understanding of stellar activity.

Abstract Copyright: © ESO 2018

Journal keyword(s): planetary systems - techniques: radial velocities - planets and satellites: detection - stars: rotation - stars: individual: HD 176986 - planets and satellites: terrestrial planets

VizieR on-line data: <Available at CDS (J/A+A/612/A41): table1.dat>

Simbad objects: 4

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Number of rows : 4

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 NAME Proxima b Pl? 14 29 42.94853 -62 40 46.1631           ~ 160 0
2 HD 176986 PM* 19 03 05.8729580588 -11 02 38.131217321   9.39 8.45     K2.5V 41 0
3 HD 176986c Pl? 19 03 05.8729580588 -11 02 38.131217321           ~ 1 0
4 HD 176986b Pl? 19 03 05.8729580588 -11 02 38.131217321           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2019.12.08-09:33:08

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