Article (Scientific journals)
Searching for gas giant planets on Solar system scales - a NACO/APP L'-band survey of A- and F-type main-sequence stars
Meshkat, T.; Kenworthy, M. A.; Reggiani, Maddalena et al.
2015In Monthly Notices of the Royal Astronomical Society, 453, p. 2533-2539
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Keywords :
instrumentation: adaptive optics; instrumentation: high angular resolution; methods: statistical; techniques: image processing; stars: early-type
Abstract :
[en] We report the results of a direct imaging survey of A- and F-type main-sequence stars searching for giant planets. A/F stars are often the targets of surveys, as they are thought to have more massive giant planets relative to solar-type stars. However, most imaging is only sensitive to orbital separations >30 au, where it has been demonstrated that giant planets are rare. In this survey, we take advantage of the high-contrast capabilities of the Apodizing Phase Plate coronagraph on NACO at the Very Large Telescope. Combined with optimized principal component analysis post-processing, we are sensitive to planetary-mass companions (2-12 M[SUB]Jup[/SUB]) at Solar system scales (≤30 au). We obtained data on 13 stars in the L' band and detected one new companion as part of this survey: an M6.0 ± 0.5 dwarf companion around HD 984. We re-detect low-mass companions around HD 12894 and HD 20385, both reported shortly after the completion of this survey. We use Monte Carlo simulations to determine new constraints on the low-mass (<80 M[SUB]Jup[/SUB]) companion frequency, as a function of mass and separation. Assuming solar-type planet mass and separation distributions, normalized to the planet frequency appropriate for A-stars, and the observed companion mass-ratio distribution for stellar companions extrapolated to planetary masses, we derive a truncation radius for the planetary mass companion surface density of <135 au at 95 per cent confidence.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Meshkat, T.;  Leiden Observatory, PO Box 9513, Niels Bohrweg 2, NL-2300 RA Leiden, the Netherlands
Kenworthy, M. A.;  Leiden Observatory, PO Box 9513, Niels Bohrweg 2, NL-2300 RA Leiden, the Netherlands
Reggiani, Maddalena ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Quanz, S. P.;  Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland
Mamajek, E. E.;  Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171, USA
Meyer, M. R.;  Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland)
Language :
English
Title :
Searching for gas giant planets on Solar system scales - a NACO/APP L'-band survey of A- and F-type main-sequence stars
Publication date :
01 November 2015
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
453
Pages :
2533-2539
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 August 2017

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