Stellar companions of exoplanet host stars Virtual Observatory Resource

Authors
  1. Schlagenhauf S.
  2. Mugrauer M.
  3. Ginski C.
  4. Buder S.
  5. Fernandez M.
  6. Bischoff R.
  7. Published by
    CDS
Abstract

Stellar multiplicity is a key aspect of exoplanet diversity, as the presence of more than one star in a planetary system can have both devastating and positive effects on its formation and evolution. In this paper, we present the results of a Lucky Imaging survey of 212 exoplanet host stars performed with AstraLux at CAHA 2.2m. The survey includes data from seven observing epochs between August 2015 and September 2020, and data for individual targets from four earlier observing epochs. The targets of this survey are nearby, bright, solar-like stars with high proper motions. In total, we detected 46 co-moving companions of 43 exoplanet host stars. Accordingly, this survey shows that the minimum multiplicity rate of exoplanet host stars is 20+-3%. In total, 33 binary and ten hierarchical triple star systems with exoplanets have been identified. All companions were found to have a common proper motion with the observed exoplanet host stars, and with our astrometry we even find evidence of orbital motion for 28 companions. For all targets, we determined the detection limit and explore the detection space for possible additional companions of these stars. Based on the reached detection limit, additional co-moving companions beyond the detected ones can be excluded around all observed exoplanet host stars. The increasing number of exoplanets discovered in multiple stellar systems suggests that the formation of planets in such systems is by no means rare, but common. Therefore, our study highlights the need to consider stellar multiplicity in future studies of exoplanet habitability.

Keywords
  1. multiple-stars
  2. proper-motions
  3. visible-astronomy
  4. trigonometric-parallax
  5. stellar-masses
Bibliographic source Bibcode
2024MNRAS.529.4768S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/529/4768
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/529/4768

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/529/4768
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/529/4768
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/529/4768
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/529/4768/tableb1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/529/4768/tableb1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/529/4768/tableb1?

History

2024-04-09T10:21:14Z
Resource record created
2024-04-09T10:21:14Z
Created
2024-08-12T13:32:48Z
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