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Direct Imaging Of Long Period Radial Velocity Targets With NICI

Published online by Cambridge University Press:  06 January 2014

Graeme S. Salter
Affiliation:
Department of Astrophysics, University of New South Wales, Kensington Campus, 2034, NSW, Australia email: g.salter@unsw.edu.au
Chris G. Tinney
Affiliation:
Department of Astrophysics, University of New South Wales, Kensington Campus, 2034, NSW, Australia email: g.salter@unsw.edu.au
Robert A. Wittenmyer
Affiliation:
Department of Astrophysics, University of New South Wales, Kensington Campus, 2034, NSW, Australia email: g.salter@unsw.edu.au
James S. Jenkins
Affiliation:
Universidad de Chile, Camino el Observatorio 1515, Las Condes, Santiago, Chile, Casilla 36-D
Hugh R.A. Jones
Affiliation:
University of Hertfordshire, Centre for Astrophysics Research, Science and Technology Research Institute, College Lane, AL10 9AB, Hatfield, UK
Simon J. O'Toole
Affiliation:
Australian Astronomical Observatory, PO Box 915, North Ryde 1670, NSW, Australia
Corresponding
E-mail address:
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Abstract

We are finally entering an era where radial velocity and direct imaging parameter spaces are starting to overlap. Radial velocity measurements provide us with a minimum mass for an orbiting companion (the mass as a function of the inclination of the system). By following up these long period radial velocity detections with direct imaging we can determine whether a trend seen is due to an orbiting planet at low inclination or an orbiting brown dwarf at high inclination. In the event of a non-detection we are still able to put a limit on the maximum mass of the orbiting body. The Anglo-Australian Planet Search is one of the longest baseline radial velocity planet searches in existence, amongst its targets are many that show long period trends in the data. Here we present our direct imaging survey of these objects with our results to date. ADI Observations have been made using NICI (Near Infrared Coronagraphic Imager) on Gemini South and analysed using an in house, LOCI-like, post processing.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

References

Marois, C., Lafreniere, D., Doyon, R., Macintosh, B., & Nadeau, D. 2006, ApJ, vol 641, 556564CrossRefGoogle Scholar
Lafreniere, D., Marois, C., Doyon, R., Nadeau, D., & Artigau, E. 2006, ApJ, vol 660, 770780CrossRefGoogle Scholar

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