HIRES radial velocity follow up for Kepler-1656 Virtual Observatory Resource

Authors
  1. Angelo I.
  2. Naoz S.
  3. Petigura E.
  4. MacDougall M.
  5. Stephan A.P.
  6. Isaacson H.,Howard A.W.
  7. Published by
    CDS
Abstract

Highly eccentric orbits are one of the major surprises of exoplanets relative to the solar system and indicate rich and tumultuous dynamical histories. One system of particular interest is Kepler-1656, which hosts a sub-Jovian planet with an eccentricity of 0.8. Sufficiently eccentric orbits will shrink in the semimajor axis due to tidal dissipation of orbital energy during periastron passage. Here our goal was to assess whether Kepler-1656b is currently undergoing such high-eccentricity migration, and to further understand the system's origins and architecture. We confirm a second planet in the system with Mc=0.40{+/-}0.09Mjup and Pc=1919{+/-}27days. We simulated the dynamical evolution of planet b in the presence of planet c and find a variety of possible outcomes for the system, such as tidal migration and engulfment. The system is consistent with an in situ dynamical origin of planet b followed by subsequent eccentric Kozai-Lidov perturbations that excite Kepler-1656b's eccentricity gently, i.e., without initiating tidal migration. Thus, despite its high eccentricity, we find no evidence that planet b is or has migrated through the high-eccentricity channel. Finally, we predict the outer orbit to be mutually inclined in a nearly perpendicular configuration with respect to the inner planet orbit based on the outcomes of our simulations and make observable predictions for the inner planet's spin-orbit angle. Our methodology can be applied to other eccentric or tidally locked planets to constrain their origins, orbital configurations, and properties of a potential companion.

Keywords
  1. exoplanets
  2. variable-stars
  3. visible-astronomy
  4. spectroscopy
  5. radial-velocity
Bibliographic source Bibcode
2022AJ....163..227A
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/227
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/163/227
Document Object Identifer DOI
doi:10.26093/cds/vizier.51630227

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/227
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/227
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/227
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2022-09-29T06:28:37Z
Resource record created
2022-09-29T06:28:37Z
Created
2022-10-10T13:15:57Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr