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How many suns are in the sky? Multiplicity surveys of exoplanet host stars

Published online by Cambridge University Press:  13 January 2020

M. Mugrauer ,
C. Ginski ,
N. Vogt ,
R. Neuhäuser  and
C. Adam
M. Mugrauer
Affiliation:
Astrophysical Institute and University Observatory Jena, Schillergäßchen 2, D-07745 Jena, Germany email: markus@astro.uni-jena.de
C. Ginski
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300, RALeiden, The Netherlands
N. Vogt
Affiliation:
Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña, 1111, Valparaíso, Chile
R. Neuhäuser
Affiliation:
Astrophysical Institute and University Observatory Jena, Schillergäßchen 2, D-07745 Jena, Germany email: markus@astro.uni-jena.de
C. Adam
Affiliation:
Instituto de Astronomía, Universidad Católica del Norte, Av. Angamos 0610, Antofagasta, Chile
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Abstract

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In order to determine the true impact of stellar multiplicity on the formation and evolution of planets, we initiated direct imaging surveys to search for (sub)stellar companions of exoplanet host stars on close orbits, as their gravitational impact on the planet bearing disk at first and on formed planets afterwards is expected to be maximal. According to theory these are the most challenging environments for planet formation and evolution but might occur quite frequently in the milky way, due to the large number of multiple stars within our galaxy. On this poster we showed results, obtained so far in the course of our AO and Lucky-imaging campaigns of exoplanet host stars, conducted with NACO/ESO-VLT for southern and with AstraLux/CAHA2.2m for northern targets, respectively. In addition, we introduced our new high contrast imaging survey with SPHERE/ESO-VLT to search for close companions of southern exoplanet host stars, and presented some first results.

Keywords

binaries (including multiple): closevisualstars: imagingplanetary systemstechniques: high angular resolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S345: Origins: From the Protosun to the First Steps of Life , August 2018 , pp. 316 - 317
Copyright
© International Astronomical Union 2020 

References

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