5 Micron Photometry of Late-Type Dwarfs | Zendy

I. Neill Reid | Zendy; Kelle L. Cruz | Zendy

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5 Micron Photometry of Late-Type Dwarfs

Author(s) -

I. Neill Reid,

Kelle L. Cruz

Publication year - 2002

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/338083

Subject(s) - photometry (optics) , astrophysics , physics , stellar classification , narrowband , astronomy , flux (metallurgy) , stars , optics , chemistry , organic chemistry

We present narrowband-M photometry of nine low-mass dwarfs with spectraltypes ranging from M2.5 to L0.5. Combining the (L'-M') colours derived from ourobservations with data from the literature, we find colours consistent with aRayleigh-Jeans flux distribution for spectral types earlier than M5, butenhanced F_3.8/F_4.7 flux ratios (negative (L'-M') colours) at later spectraltypes. This probably reflects increased absorption at M' due to the COfundamental band. We compare our results against recent model predictions andbriefly discuss the implications.Comment: accepted for the Astronomical Journa

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