Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275..841s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 275, NO. 3/AUG1, P. 841, 1995
Astronomy and Astrophysics
Astronomy
10
Binaries: General - Stars: Fundamental Parameters - Stars: Low Mass, Brown Dwarfs - Open Clusters And Associations: Individual: Pleiades - Infrared: Stars
Scientific paper
We present low-resolution infrared spectra in the range 1-2.5 μm for a sample of low-mass stars and brown dwarf candidates in the Pleiades. The spectra are used in an attempt to evaluate the effective temperature of the low-mass objects using both constant water vapour opacity fits and spectral lines. Good agreement is found between the temperatures derived by these methods and those derived in previous papers using the I - K colour, strengthening the identification of our two faintest proper motion members (HHJ2 and HHJ3) as brown dwarfs. In addition the spectra are used to search for evidence of unresolved binarity amongst our Pleiades sample. One object (HHJ54), which we previously identified from its photometry as a good binary candidate, shows evidence from its 2.1- μm spectral slope and CO band strength for an unresolved binary companion of mass ˜0.035 Msun.
Hambly Nigel C.
Hodgkin Simon T.
Jameson Richard F.
Steele Iain A.
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