Proper motion Pleiades candidate L-type brown dwarfs
نویسندگان
چکیده
منابع مشابه
Pleiades Low-mass Brown Dwarfs: the Cluster L Dwarf Sequence
We present a search for low-mass brown dwarfs in the Pleiades open cluster. The identification of Pleiades members fainter and cooler than those currently known allows us to constrain evolutionary models for L dwarfs and to extend the study of the cluster mass function to lower masses. We conducted a 1.8 deg2 near-infrared J-band survey at the 3.5 m Calar Alto Telescope, with completeness Jcpl ...
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ISOCAM measurements or upper limits for low mass members of the ρ Ophiuchi embedded cluster extend the sampling of the spectral energy distributions already obtained from the ground towards longer wavelengths, where emission by circumstellar material is significant. Good fits to the combined (ground-based + ISOCAM) photometry are obtained with theoretical models of pre-main sequence evolution, ...
متن کاملModeling Brown Dwarfs , L Dwarfs , and T Dwarfs
In this contribution, I touch on a subset of our recent efforts in spectral and opacity modeling aimed at improving our understanding of brown dwarfs, L dwarfs, and T dwarfs. I discuss theoretical calculations of the alkali line profiles, newly generated CrH opacities, new evidence for refractory rainout in T dwarfs from optical spectral measurements, and the distinction between brown dwarfs an...
متن کاملA search for variability in brown dwarfs and L dwarfs
We have undertaken a differential photometric I band search for variability in three Pleiades brown dwarfs and three very low mass field L dwarfs. Analysis of the resultant time series for the Pleiades brown dwarfs (Teide 1, Calar 3, Roque 11) gives no evidence for variability (above 99% confidence) greater than 0.05 mags in any of these objects on timescales between 25 minutes and 27 hours. Ti...
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We have obtained deep CCD R and I mosaic imaging of 578 arcmin 2 within 1 • .5 of the Pleiades' center – reaching a completeness magnitude I = 19.5 – with the aim of finding free-floating brown dwarfs. Teide 1, the best bona f ide brown dwarf discovered so far in the cluster (Rebolo, Zapatero Osorio & Martín 1995), arose as a result of a combined photometric and astrometric study of ∼1/4 of our...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2005
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.200510473