Astron. Astrophys. Suppl. Ser. 134, 537-543

Brown dwarfs in the Pleiades cluster

III. A deep IZ survey

M.R. Zapatero Osorio¹, R. Rebolo¹, E.L. Martín^1, S.T. Hodgkin², M.R. Cossburn², A. Magazzù^3,, I.A. Steele⁴, - R.F. Jameson²

Send offprint request: M.R. Zapatero Osorio

1 - Instituto de Astrofísica de Canarias, C/, Vía Láctea s/n, E-38200 La Laguna, Tenerife, Spain
2 - Astronomy Group, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
3 - Centro Galileo Galilei, Apartado 565, E-38700 Santa Cruz de La Palma, Islas Canarias, Spain
4 - Astrophysics Research Institute, Liverpool John Moores University, Liverpool L3 3AF, UK

Received August 5; accepted September 16, 1998

Abstract:

We present the results of a deep CCD-based IZ photometric survey of a $\sim$1deg² area in the central region of the Pleiades Galactic open cluster. The magnitude coverage of our survey (from $I\,\sim\,17.5$ down to 22) allows us to detect substellar candidates with masses between 0.075 and 0.03$M_{\odot}$. Details of the photometric reduction and selection criteria are given. Finder charts prepared from the I-band images are provided.

Key words: stars: low-mass, brown dwarfs -- Galaxy: open clusters and associations: Pleiades catalogs