EDP Sciences
Free access
Issue A&A
Volume 453, Number 2, July II 2006
Page(s) 609 - 614
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20054475



A&A 453, 609-614 (2006)
DOI: 10.1051/0004-6361:20054475

Early ComeOn+ adaptive optics observation of GQ Lupi and its substellar companion

M. Janson1, W. Brandner1, T. Henning1 and H. Zinnecker2

1  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
    e-mail: [janson;brandner;henning]@mpia.de
2  Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
    e-mail: hzinnecker@aip.de

(Received 4 November 2005 / Accepted 21 March 2006)

Abstract
We present an analysis of adaptive optics K-band imaging data of GQ Lup acquired in 1994 by the first generation adaptive optics system ComeOn+ at the ESO 3.6 m optical telescope in La Silla. The data reveal a likely candidate for the low-mass companion recently reported in the literature. An a posteriori detection in the 11-year old data would provide a useful astrometric data point for the very long-period (~1000 yr) orbit of the GQ Lup system. However, the data is severely contaminated by speckle noise at the given projected separation, which decreases the confidence of the detection. Still, from the data we can conclude that GQ Lup B is not an unrelated background source, but instead a physical companion to GQ Lup A. We present here the reduction and analysis of the ComeOn+ images, as well as the results. We also discuss the nature of the companion based on data and models available in the scientific literature and examine claims made regarding the classification of the object as a planet.


Key words: stars: low-mass, brown dwarfs -- stars: pre-main sequence -- planetary systems

SIMBAD Objects



© ESO 2006

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.

Editor-in-Chief: T. Forveille
Letters Editor-in-Chief: J. Alves
Managing Editor: C. Bertout

ISSN: 0004-6361 ; e-ISSN: 1432-0746
Frequency: 12 volumes per year
Published by: EDP Sciences

Mirror sites: CDS | EDP Sciences
  RSS feeds
© The European Southern Observatory (ESO)