5-micron photometry of late-type dwarfs
Astrophysics
2009-11-07 v1
Abstract
We present narrowband-M photometry of nine low-mass dwarfs with spectral types ranging from M2.5 to L0.5. Combining the (L'-M') colours derived from our observations with data from the literature, we find colours consistent with a Rayleigh-Jeans flux distribution for spectral types earlier than M5, but enhanced F_3.8/F_4.7 flux ratios (negative (L'-M') colours) at later spectral types. This probably reflects increased absorption at M' due to the CO fundamental band. We compare our results against recent model predictions and briefly discuss the implications.
Cite
@article{arxiv.astro-ph/0110340,
title = {5-micron photometry of late-type dwarfs},
author = {I. N. Reid and K. L. Cruz},
journal= {arXiv preprint arXiv:astro-ph/0110340},
year = {2009}
}
Comments
accepted for the Astronomical Journal