SIMBAD references

2015MNRAS.447.3218C - Mon. Not. R. Astron. Soc., 447, 3218-3226 (2015/March-2)

Multiwaveband photometry of the irradiated brown dwarf WD0137-349B.

CASEWELL S.L., LAWRIE K.A., MAXTED P.F.L., MARLEY M.S., FORTNEY J.J., RIMMER P.B., LITTLEFAIR S.P., WYNN G., BURLEIGH M.R. and HELLING C.

Abstract (from CDS):

WD0137-349 is a white dwarf-brown dwarf binary system in a 116 min orbit. We present radial velocity observations and multiwaveband photometry from V, R and I in the optical, to J, H and Ks in the near-IR and [3.6], [4.5], [5.8] and [8.0] µm in the mid-IR. The photometry and light curves show variability in all wavebands, with the amplitude peaking at [4.5] µm, where the system is also brightest. Fluxes and brightness temperatures were computed for the heated and unheated atmosphere of the brown dwarf (WD0137-349B) using synthetic spectra of the white dwarf using model atmosphere simulations. We show that the flux from the brown dwarf dayside is brighter than expected in the Ks and [4.5] µm bands when compared to models of irradiated brown dwarfs with full energy circulation and suggest this overluminosity may be attributed to H2 fluorescence or H_3^+ being generated in the atmosphere by the UV irradiation.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): binaries: close - brown dwarfs - white dwarfs

Simbad objects: 10

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2020.09.19-19:09:50

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