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- W2094982068 abstract "We present observations of 36 late M dwarfs obtained with the Keck II/NIRSPEC in the J band at a resolution of ∼20,000. We have measured projected rotational velocities, absolute radial velocities, and pseudo-equivalent widths of atomic lines. Twelve of our targets did not have previous measurements in the literature. For the other 24 targets, we confirm previously reported measurements. We find that 13 stars from our sample have v sin i below our measurement threshold (12 km s−1) whereas four of our targets are fast rotators (v sin i > 30 km s−1). As fast rotation causes spectral features to be washed out, stars with low projected rotational velocities are sought for radial velocity surveys. At our intermediate spectral resolution, we have confirmed the identification of neutral atomic lines reported in McLean et al. We also calculated pseudo-equivalent widths of 12 atomic lines. Our results confirm that the pseudo-equivalent width of K i lines is strongly dependent on spectral types. We observe that the pseudo-equivalent width of Fe i and Mn i lines remains fairly constant with later spectral type. We suggest that these lines are particularly suitable for deriving metallicities for late M dwarfs." @default.
- W2094982068 created "2016-06-24" @default.
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- W2094982068 date "2012-09-05" @default.
- W2094982068 modified "2023-09-28" @default.
- W2094982068 title "INTERMEDIATE RESOLUTION NEAR-INFRARED SPECTROSCOPY OF 36 LATE M DWARFS" @default.
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- W2094982068 doi "https://doi.org/10.1088/0004-6256/144/4/99" @default.
- W2094982068 hasPublicationYear "2012" @default.
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