5 Micron photometry of late-type dwarfs

被引:18
作者
Reid, IN
Cruz, KL
机构
[1] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[2] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
关键词
stars : late-type; stars; low-mass; brown dwarfs;
D O I
10.1086/338083
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present narrowband M photometry of nine low-mass dwarfs with spectral types ranging from M2.5 to L0.5. Combining the (L'-M') colors derived from our observations with data from the literature, we find colors 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'] colors) 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.
引用
收藏
页码:466 / 472
页数:7
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