159 citations · 421 across the 7 of their papers we have counts for
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Optical spectroscopy of isolated planetary mass objects in the sigma Orionis cluster
D. Barrado-y-Navascués, M. R. Zapatero-Osorio, V. J. S. Béjar +5
We have obtained low resolution optical spectra of 15 isolated planetary mass objects (IPMOs) in the sigma Orionis cluster, and derived spectral types by comparison with nearby M a…
The Substellar Mass Function in sigma Orionis
V. J. S. Bejar, E. L. Martin, M. R. Zapatero Osorio +7
We combine results from imaging searches for substellar objects in the sigma Orionis cluster and follow-up photometric and spectroscopic observations to derive a census of the brow…
The effect of stellar activity on the LiI 6708, NaI 5896 and KI 7699 Ålines: A comparison with the Pleiades, field stars and the Sun
D. Barrado y Navascués, R. J. García López, G. Severino +1
An analytical model has been developed to empirically study the effects of stellar spots and faculae on the observed equivalent widths of Li {\sc i} 6708, Na {\sc i} 5896 and K {\s…