Original Paper

New brown dwarf candidates in the Pleiades†‡

  1. T. Eisenbeiss,
  2. M. Moualla1,
  3. M. Mugrauer1,
  4. T.O.B. Schmidt1,
  5. St. Raetz1,
  6. R. Neuhäuser1,
  7. Ch. Ginski1,
  8. M.M. Hohle1,2,
  9. A. Koeltzsch1,
  10. C. Marka1,
  11. W. Rammo1,
  12. A. Reithe1,
  13. T. Roell1,
  14. M. Vaňko1

Article first published online: 18 MAY 2009

DOI: 10.1002/asna.200911208

Issue

Astronomische Nachrichten

Astronomische Nachrichten

Volume 330, Issue 5, pages 439–458, June 2009

Additional Information

How to Cite

Eisenbeiss, T., Moualla, M., Mugrauer, M., Schmidt, T.O.B., Raetz, St., Neuhäuser, R., Ginski, Ch., Hohle, M.M., Koeltzsch, A., Marka, C., Rammo, W., Reithe, A., Roell, T. and Vaňko, M. (2009), New brown dwarf candidates in the Pleiades. Astron. Nachr., 330: 439–458. doi: 10.1002/asna.200911208

Author Information

  1. 1

    Astrophysikalisches Institut und Universitäts-Sternwarte Jena, Schillergäßchen 2-3, D-07745 Jena, Germany

  2. 2

    Max Planck Institut für extraterrestrische Physik Garching, Giessenbachstraße, D-85738 Garching, Germany

  1. †

    Based on observations obtained with telescopes of the University Observatory Jena, which is operated by the Astrophysical Institute of the Friedrich-Schiller-University.

  2. ‡

    Table A3 is available at the CDS via http://cdsarc.u-strasbg.fr/pub/cats/J/AN/330/439

Publication History

  1. Issue published online: 18 MAY 2009
  2. Article first published online: 18 MAY 2009
  3. Manuscript Accepted: 25 APR 2009
  4. Manuscript Received: 20 FEB 2009

Funded by

  • German National Science Foundation. Grant Numbers: NE 515/13-1, 13-2, 23-1
  • DFG. Grant Numbers: KR 2164/8-1, NE 515/23-1
  • EU
  • FP6 MC ToK project. Grant Number: MTKD-CT-2006-042514
  • Evangelisches Studienwerk e.V. Villigst
  • Syrian government

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Keywords:

  • open clusters and associations: individual (Pleiades);
  • stars: low-mass, brown dwarfs;
  • techniques: image processing

Abstract

We have performed deep, wide-field imaging on a ∼0.4 deg2 field in the Pleiades (Melotte 22). The selected field was not yet target of a deep search for low mass stars and brown dwarfs. Our limiting magnitudes are R ∼ 22 mag and I ∼ 20 mag, sufficient to detect brown dwarf candidates down to 40 MJ. We found 197 objects, whose location in the (I, R – I) color magnitude diagram is consistent with the age and the distance of the Pleiades. Using CTK R and I as well as JHK photometry from our data and the 2MASS survey we were able to identify 7 new brown dwarf candidates. We present our data reduction technique, which enables us to resample, calibrate, and co-add many images by just two steps. We estimate the interstellar extinction and the spectral type from our optical and the NIR data using a two-dimensional χ2 fitting (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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