High-Resolution Spectroscopy of Ultracool M Dwarfs

@article{Reid2002HighResolutionSO,
  title={High-Resolution Spectroscopy of Ultracool M Dwarfs},
  author={I. Reid and J. Kirkpatrick and J. Liebert and J. Gizis and C. Dahn and D. Monet},
  journal={The Astronomical Journal},
  year={2002},
  volume={124},
  pages={519-540}
}
We present high-resolution echelle spectroscopy of 39 dwarfs with spectral types between M6.5 and L0.5. With one exception, those dwarfs were selected from the Two Micron All Sky Survey database using photometric criteria, (J-KS) ≥ 1.1 and KS ≤ 12.0, and therefore should provide a sample free of the kinematic biases that can affect proper-motion–selected samples. Two of the stars, 2MASSI J0253202+271333 and 2MASSW J0952219-192431, are double-lined spectroscopic binaries. We have used our… Expand
Space Velocities of L- and T-type Dwarfs
We have obtained radial velocities of a sample of 18 ultracool dwarfs (M6.5-T8) using high-resolution, near-infrared spectra obtained with NIRSPEC and the Keck II telescope. We have confirmed thatExpand
Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field
We present a 20 pc, volume-limited sample of M7YL8 dwarfs created through spectroscopic follow-up of sources selected from the Two Micron All Sky Survey Second Incremental Release Point SourceExpand
Spectroscopic Rotational Velocities of Brown Dwarfs
We have obtained projected rotation velocities (vrot sin i) of a sample of 19 ultracool dwarfs with spectral types in the interval M6.5-T8 using high-resolution, near-infrared spectra obtained withExpand
PHYSICAL PROPERTIES OF YOUNG BROWN DWARFS AND VERY LOW MASS STARS INFERRED FROM HIGH-RESOLUTION MODEL SPECTRA
By comparing near-infrared spectra with atmospheric models, we infer the effective temperature, surface gravity, projected rotational velocity, and radial velocity for 21 very low mass stars andExpand
The NIRSPEC Brown Dwarf Spectroscopic Survey. II. High-Resolution J-Band Spectra of M, L, and T Dwarfs
We present a sequence of high-resolution (R ~ 20,000, or 15 km s^(-1)) infrared spectra of stars and brown dwarfs spanning spectral types M2.5 to T6. Observations of 16 objects were obtained usingExpand
A VOLUME-LIMITED SAMPLE OF 63 M7-M9.5 DWARFS. I. SPACE MOTION, KINEMATIC AGE, AND LITHIUM
In a volume-limited sample of 63 ultracool dwarfs of spectral type M7-M9.5, we have obtained high-resolution spectroscopy with UVES at the Very Large Telescope and HIRES at Keck Observatory. In thisExpand
ACTIVITY AND KINEMATICS OF ULTRACOOL DWARFS, INCLUDING AN AMAZING FLARE OBSERVATION
We present the activity and kinematics of a representative volume-limited (20 pc) sample of 152 late-M and L dwarfs (M7-L8) photometrically selected from the Two Micron All Sky Survey (2MASS). UsingExpand
INTERMEDIATE RESOLUTION NEAR-INFRARED SPECTROSCOPY OF 36 LATE M DWARFS
We present observations of 36 late M dwarfs obtained with the Keck II/NIRSPEC in the J band at a resolution of {approx}20,000. We have measured projected rotational velocities, absolute radialExpand
A Near-infrared Spectroscopic Study of Young Field Ultracool Dwarfs
We present a near-infrared (0.9-2.4 μm) spectroscopic study of 73 field ultracool dwarfs having spectroscopic and/or kinematic evidence of youth (10-300 Myr). Our sample is composed of 48Expand
Spectroscopy of Hyades L dwarf candidates
We present the results of photometric, astrometric, and spectroscopic follow-up of L dwarf candidates identified in the Hyades cluster by Hogan et al. (2008). We obtained low-resolution opticalExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 92 REFERENCES
Low-mass spectroscopic binaries in the Hyades: a candidate brown dwarf companion
We have used the HIRES echelle spectrograph on the Keck I telescope to obtain high-resolution spectroscopy of 51 late-type M dwarfs in the Hyades cluster. Cross-correlating the calibrated dataExpand
L Dwarfs and the Substellar Mass Function
Analysis of initial observations sky surveys has shown that the resulting photometric catalogs, combined with far-red optical data, provide an extremely effective method of finding isolated, veryExpand
The Coolest Isolated M Dwarf and Other 2MASS Discoveries
We have obtained follow-up spectroscopy of eight late dwarf candidates discovered in a 105 deg2 area observed with the 2MASS Prototype Camera during test runs between 1992 and 1994. These objectsExpand
High-resolution spectra of very low-mass stars
We present the results of high-resolution (1–0.4 A) optical spectroscopy of a sample of very low-mass stars. These data are used to examine the kinematics of the stars at the bottom of theExpand
Four Nearby L Dwarfs
We present spectroscopic, photometric and astrometric observations of four bright L dwarfs identified in the course of the 2MASS near-infrared survey. Our spectroscopic data extend to wavelengthsExpand
Keck Spectra of Pleiades Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Edge in the Pleiades
We have obtained intermediate resolution spectra of 11 candidate brown dwarf members of the Pleiades open cluster using the Keck II telescope and Low-Resolution Imaging Spectrograph. Our primary goalExpand
Spectroscopic Classification of Late-M and L Field Dwarfs
We present spectra for 12 new ultracool dwarfs found in the DENIS infrared survey. Seven of them have spectral types at the bottom of the M-class (M8–M9.5), and the other five belong to the coolerExpand
New Neighbors from 2MASS: Activity and Kinematics at the Bottom of the Main Sequence
We have combined 2MASS and POSS II data in a search for nearby ultracool (later than M6.5) dwarfs with Ks 6 A) ultracool M dwarfs are consistent with an ordinary old disk stellar population, whileExpand
Infrared Spectra of Low-Mass Stars: Toward a Temperature Scale for Red Dwarfs
We present new low-resolution (R ~ 250) 1.0-2.4 pm spectra for 13 red dwarf stars. The sample size is increased to 16 by including other published infrared spectra. New, as well as published, redExpand
The initial mass function of low-mass stars and brown dwarfs in young clusters
We have obtained images of the Trapezium Cluster (140'' × 140''; 0.3 pc × 0.3 pc) with the Hubble Space Telescope Near-Infrared Camera and Multi-Object Spectrometer (NICMOS). Combining these dataExpand
...
1
2
3
4
5
...