Bibcode
Barrado y Navascués, David; Zapatero Osorio, María Rosa; Béjar, Víctor; Rebolo, Rafael; Martín, Eduardo L.; Mundt, Reinhard; Bailer-Jones, Coryn A. L.
Bibliographical reference
The Origin of Stars and Planets: The VLT View: Proceedings of the ESO Workshop Held in Garching, Germany, 24-27 April 2001, ESO ASTROPHYSICS SYMPOSIA. ISBN 3-540-43541-7. Edited by. J.F. Alves and M.J. McCaughrean. Springer-Verlag, 2002, p. 195
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2002
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Description
We present low resolution optical spectra of isolated planetary
candidate members of the young cluster σ Orionis. Using several
key spectral features, as well as pseudocontinuum indices, we have
derived spectral types for this sample and confirmed the nature and the
membership of all of them but one. Additionally, the results suggest
that one, and possibly other two, could be binary systems. Finally, most
of the objects have Hα in emission.