M dwarf catalog of LAMOST pilot survey

Abstract

We present a spectroscopic catalog of 67082 M dwarfs from the LAMOST pilot survey. For each spectrum of the catalog, spectral subtype, radial velocity, equivalent width of H$\alpha$, a number of prominent molecular band indices and the metal sensitive parameter $\zeta$ are provided . Spectral subtype have been estimated by a remedied Hammer program (Original Hammer: Covey et al. 2007), in which indices are reselected to obtain more accurate auto-classified spectral subtypes. All spectra in this catalog have been visually inspected to confirm the spectral subtypes. Radial velocities have been well measured by our developed program which uses cross-correlation method and estimates uncertainty of radial velocity as well. We also examine the magnetic activity properties of M dwarfs traced by H$\alpha$ emission line. The molecular band indices included in this catalog are temperature or metallicity sensitive and can be used for future analysis of the physical properties of M dwarfs. The catalog is available on the website \url{http://sciwiki.lamost.org/MCatalogPilot/}.

29 pages, 9 figures,submitted to AJ

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• A Catalog of Cool Dwarf Targets for the Transiting Exoplanet Survey Satellite
• Scaling K2. I. Revised Parameters for 222,088 K2 Stars and a K2 Planet Radius Valley at 1.9 $R_{\oplus }$
• What are little worlds made of? Stellar abundances and the building blocks of planets
• Machine learning Applied to Star-Galaxy-QSO Classification and Stellar Effective Temperature Regression
• Stellar parametrization of LAMOST M dwarf stars
• Selecting M-giants with infra-red photometry: Distances, metallicities and the Sagittarius stream
• Data mining techniques on astronomical spectra data. II : Classification Analysis
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• LAMOST Observations of Flaring M Dwarfs in the Kepler Field
• Automated identification of 2612 late-k and M dwarfs in the LAMOST commissioining data using the classification template fits
• Solar and Stellar Photospheric Abundances
• Revision of Stellar Intrinsic Colors in the Infrared by the Spectroscopic Surveys
• Stellar Atmospheric Parameters of M-type Stars from LAMOST DR8
• M subdwarf research. I. Identification, modified classification system, and sample construction
• Recognition of M-type stars in the unclassified spectra of LAMOST DR5 using a hash learning method
• Ultracool dwarfs identified using spectra in LAMOST DR7
• M Subdwarf Research III. Spectroscopic Diagnostics for Breaking Parameter Degeneracy