SIMBAD references

2017A&A...608A..93G - Astronomy and Astrophysics, volume 608A, 93-93 (2017/12-1)

K2-106, a system containing a metal-rich planet and a planet of lower density.

GUENTHER E.W., BARRAGAN O., DAI F., GANDOLFI D., HIRANO T., FRIDLUND M., FOSSATI L., CHAU A., HELLED R., KORTH J., PRIETO-ARRANZ J., NESPRAL D., ANTONICIELLO G., DEEG H., HJORTH M., GRZIWA S., ALBRECHT S., HATZES A.P., RAUER H., CSIZMADIA S., SMITH A.M.S., CABRERA J., NARITA N., ARRIAGADA P., BURT J., BUTLER R.P., COCHRAN W.D., CRANE J.D., EIGMULLER P., ERIKSON A., JOHNSON J.A., KIILERICH A., KUBYSHKINA D., PALLE E., PERSSON C.M., PATZOLD M., SABOTTA S., SATO B., SHECTMAN S.A., TESKE J.K., THOMPSON I.B., VAN EYLEN V., NOWAK G., VANDERBURG A., WINN J.N. and WITTENMYER R.A.

Abstract (from CDS):

Aims. Planets in the mass range from 2 to 15M are very diverse. Some of them have low densities, while others are very dense. By measuring the masses and radii, the mean densities, structure, and composition of the planets are constrained. These parameters also give us important information about their formation and evolution, and about possible processes for atmospheric loss.
Methods. We determined the masses, radii, and mean densities for the two transiting planets orbiting K2-106. The inner planet has an ultra-short period of 0.57 days. The period of the outer planet is 13.3 days.
Results. Although the two planets have similar masses, their densities are very different. For K2-106b we derive Mb=8.36–0.94+0.96M, Rb=1.52±0.16R, and a high density of 13.1–3.6+5.4g/cm3. For K2-106c, we find Mc=5.8–3.0+3.3M, Rc=2.50–0.26+0.27R and a relatively low density of 2.0–1.1+1.6g/cm3.
Conclusions. Since the system contains two planets of almost the same mass, but different distances from the host star, it is an excellent laboratory to study atmospheric escape. In agreement with the theory of atmospheric-loss processes, it is likely that the outer planet has a hydrogen-dominated atmosphere. The mass and radius of the inner planet is in agreement with theoretical models predicting an iron core containing 80–30+20% of its mass. Such a high metal content is surprising, particularly given that the star has an ordinary (solar) metal abundance. We discuss various possible formation scenarios for this unusual planet.

Abstract Copyright: © ESO, 2017

Journal keyword(s): techniques: photometric - techniques: radial velocities - stars: abundances - stars: individual: TYC 608-458-1 - planetary systems - planetary systems

VizieR on-line data: <Available at CDS (J/A+A/608/A93): k2-106re.dat k2-106ab.dat>

CDS comments: (F) k2-106re.dat k2-106ab.dat

Simbad objects: 19

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2017A&A...608A..93G and select 'bookmark this link' or equivalent in the popup menu


2019.11.14-16:30:35

© Université de Strasbourg/CNRS

    • Contact