J/A+A/540/A85 Spectroscopy of very low mass objects (Patience+, 2012)
Spectroscopy across the brown dwarf/planetary mass boundary.
I. Near-infrared JHK spectra.
Patience J., King R.R., De Rosa R.J., Vigan A., Witte S., Rice E.,
Helling C., Hauschildt P.
<Astron. Astrophys., 540, A85 (2012)>
=2012A&A...540A..85P 2012A&A...540A..85P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Spectra, infrared
Keywords: planetary systems - brown dwarfs - stars: atmospheres -
binaries: close - techniques: high angular resolution
Abstract:
With a uniform VLT SINFONI data set of nine targets, we have developed
an empirical grid of J, H, K spectra of the atmospheres of objects
estimated to have very low substellar masses of ∼5-20MJup and
young ages ranging from ∼1-50Myr. Most of the targets are
companions, objects which are especially valuable for comparison with
atmosphere and evolutionary models, as they present rare cases in
which the age is accurately known from the primary. Based on the youth
of the sample, all objects are expected to have low surface gravity,
and this study investigates the critical early phases of the evolution
of substellar objects. The spectra are compared with grids of five
different theoretical atmosphere models.
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Author's address:
Jenny Patience,
(End) Patricia Vannier [CDS] 06-Sep-2012