First Results from MFOSC-P : Low Resolution Optical Spectroscopy of a Sample of M dwarfs within 100 parsecs

Abstract

Mt. Abu Faint Object Spectrograph and Camera (MFOSC-P) is an in-house developed instrument for Physical Research Laboratory (PRL) 1.2m telescope at Mt. Abu India, commissioned in February 2019. Here we present the first science results derived from the low resolution spectroscopy program of a sample of M Dwarfs carried out during the commissioning run of MFOSC-P between February-June 2019. M dwarfs carry great significance for exoplanets searches in habitable zone and are among the promising candidates for the observatory's several ongoing observational campaigns. Determination of their accurate atmospheric properties and fundamental parameters is essential to constrain both their atmospheric and evolutionary models. In this study, we provide a low resolution (R$\sim$500) spectroscopic catalogue of 80 bright M dwarfs (J$<$10) and classify them using their optical spectra. We have also performed the spectral synthesis and ${\chi }^2$ minimisation techniques to determine their fundamental parameters viz. effective temperature and surface gravity by comparing the observed spectra with the most recent BT-Settl synthetic spectra. Spectral type of M dwarfs in our sample ranges from M0 to M5. The derived effective temperature and surface gravity are ranging from 4000 K to 3000 K and 4.5 to 5.5 dex, respectively. In most of the cases, the derived spectral types are in good agreement with previously assigned photometric classification.

arXiv commentAccepted for Publication in MNRAS

References in corpus (31)

• The Sloan Digital Sky Survey: Technical Summary
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The VizieR database of Astronomical Catalogues
• Solar Chemical Abundances Determined with a CO5BOLD 3D Model Atmosphere
• The Galactic disk mass function: reconciliation of the HST and nearby determinations
• Gaia Data Release 2: using Gaia parallaxes
• A high accuracy computed water line list
• Model Atmospheres for M (Sub)Dwarfs: I. The base model grid
• M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale
• The Palomar/MSU Nearby Star Spectroscopic Survey III: Chromospheric Activity, M-dwarf Ages and the Local Star Formation History
• Low-Mass Dwarf Template Spectra from the Sloan Digital Sky Survey
• A Spectroscopic Catalog of the Brightest (J<9) M Dwarfs in the Northern Sky
• Chromospheric Activity, Rotation, and Rotational Braking in M and L Dwarfs
• An All-Sky Catalog of Bright M Dwarfs
• The Effective Temperature Scale of M dwarfs
• Revised metallicity classes for low-mass stars: dwarfs (dM), subdwarfs (sdM), extreme subdwarfs (esdM), and ultra subdwarfs (usdM)
• TiO and H${}_2$O absorption lines in cool stellar atmospheres
• The solar photospheric nitrogen abundance. Analysis of atomic transitions with 3D and 1D model atmospheres
• The Solar Neighborhood VI: New Southern Stars Identified by Optical Spectroscopy
• The CARMENES search for exoplanets around M dwarfs -- Photospheric parameters of target stars from high-resolution spectroscopy. II. Simultaneous multiwavelength range modeling of activity insensitive lines
• Model Atmospheres From Very Low Mass Stars to Brown Dwarfs
• Search for nearby stars among proper motion stars selected by optical-to-infrared photometry III. Spectroscopic distances of 322 NLTT stars
• A high resolution spectroscopic atlas of M subdwarfs - Effective temperature and metallicity
• A catalogue of bright (K < 9) M dwarfs
• New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0.5<mu<2.0 arcsec/yr at High Galactic Latitudes
• Fundamental M-dwarf parameters from high-resolution spectra using PHOENIX ACES models: I. Parameter accuracy and benchmark stars
• The PRL Stabilized High Resolution Echelle Fiber-fed Spectrograph: Instrument Description & First Radial Velocity Results
• Photospheric properties and fundamental parameters of M dwarfs
• The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence
• Evidence of a Sub-Saturn around EPIC~211945201
• Spectral energy distribution of M-subdwarfs: A study of their atmospheric properties

Cited by in corpus (6)

• Optical and near-infrared spectroscopy of Nova V2891 Cygni: evidence for shock-induced dust formation
• Exploring the short-term variability of H$\alpha$ and H$\beta$ emissions in a sample of M dwarfs
• Design and Development of Mt. Abu Faint Object Spectrograph and Camera -- Pathfinder (MFOSC-P) for PRL 1.2m Mt. Abu Telescope
• UV spectroscopy confirms SU Lyn to be a symbiotic star
• The Flare-Activity of 2MASSJ16111534-1757214 in the Upper Scorpius association
• Exploring stellar activity in a sample of active M dwarfs