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The SpeX Prism Library (SPL) is a uniform compilation of low-resolution (R ~ 75-120), near-infrared (0.8-2.5 micron) spectra spanning a decade of observations with the IRTF SpeX spectrograph. Primarily containing ultracool M, L, T and Y…

Solar and Stellar Astrophysics · Physics 2014-06-20 Adam J. Burgasser

We present a new library of high-resolution synthetic spectra based on the stellar atmosphere code PHOENIX that can be used for a wide range of applications of spectral analysis and stellar parameter synthesis. The spherical mode of PHOENIX…

We present the single stellar population (SSP) synthesis results of our new synthetic stellar atmosphere models library with a spectral sampling of 0.3 A, covering the wavelength range from 3000 A to 7000 A for a wide range of metallicities…

The comprehensive knowledge of fundamental parameters of single stars is the basis of the modelling of star clusters and galaxies. Most fundamental stellar parameters of the individual components in SB2 eclipsing binaries are known with…

Astrophysics · Physics 2009-10-31 E. Lastennet , T. Lejeune , P. Westera , R. Buser

The asteroseismic and planetary studies, like all research related to stars, need precise and accurate stellar atmospheric parameters as input. We aim at deriving the effective temperature (Teff), the surface gravity (log g), the…

Estimating precise metallicity of M dwarfs is a well-known difficult problem due to their complex spectra. In this work, we empirically calibrate the metallicity using wide binaries with a F, G, or K dwarf and a M dwarf companion. With 1308…

Solar and Stellar Astrophysics · Physics 2023-12-21 Dan Qiu , Jiadong Li , Bo Zhang , Chao Liu , Haijun Tian , Zexi Niu

We present an analysis of the intrinsic colors and temperatures of 5-30 Myr old pre-main sequence (pre-MS) stars using the F0 through M9 type members of nearby, negligibly reddened groups: Eta Cha cluster, TW Hydra Association, Beta Pic…

Solar and Stellar Astrophysics · Physics 2015-06-16 Mark J. Pecaut , Eric E. Mamajek

(Abriged) A new grid of theoretical color indices for the Stromgren uvby photometric system has been derived from MARCS model atmospheres and SSG synthetic spectra for cool dwarf and giant stars. At warmer temperatures this grid has been…

Astrophysics · Physics 2009-11-10 J. L. Clem , D. A. VandenBerg , F. Grundahl , R. A. Bell

The ever-growing number of large spectroscopic survey programs has increased the importance of fast and reliable methods with which to determine precise stellar parameters. Some of these methods are highly dependent on correct spectroscopic…

Solar and Stellar Astrophysics · Physics 2016-10-26 G. D. C. Teixeira , S. G. Sousa , M. Tsantaki , M. J. P. F. G. Monteiro , N. C. Santos , G. Israelian

We present here medium resolution (\lambda /\Delta\lambda\sim1200) H- and K-band spectra of M type dwarf stars covering the wavelength range 1.50 - 1.80 {\mu}m and 1.95 - 2.45 {\mu}m. The sample includes 53 dwarf stars (M0V-M7V) from new…

Solar and Stellar Astrophysics · Physics 2021-07-30 Dhrimadri Khata , Soumen Mondal , Ramkrishna Das , Supriyo Ghosh , Samrat Ghosh

The effective temperature (Teff) distribution of stellar evolution models along the red giant branch (RGB) is sensitive to a number of parameters including the overall metallicity, elemental abundance patterns, the efficiency of convection,…

Solar and Stellar Astrophysics · Physics 2018-07-04 Jieun Choi , Aaron Dotter , Charlie Conroy , Yuan-Sen Ting

Large scale, deep survey missions such as GAIA will collect enormous amounts of data on a significant fraction of the stellar content of our Galaxy. These missions will require a careful optimisation of their observational systems in order…

Astrophysics · Physics 2010-10-28 Coryn A. L. Bailer-Jones

Empirical correlations between stellar parameters such as rotation or radius and magnetic activity diagnostics require estimates of the effective temperatures and the stellar radii. The aim of this study is to propose simple methods that…

Solar and Stellar Astrophysics · Physics 2019-07-17 Eric R. Houdebine , D. J. Mullan , J. G. Doyle , Geoffroy de La Vieuville , C. J. Butler , F. Paletou

The X-shooter Spectral Library (XSL) is an empirical stellar library at medium spectral resolution covering the wavelength range from 3000 \AA to 24 800 \AA. This library aims to provide a benchmark for stellar population studies. In this…

A self-consistent spectrophotometric modelling of intermediate age post-starburst requires accurate stellar ingredients taking into account a principal feature of the stars dominating the near-IR emission during this phase: the variability…

Astrophysics · Physics 2007-05-23 M. Mouhcine , A. Lancon

We present empirical metallicity-dependent calibrations of effective temperature against colours for dwarfs of luminosity classes IV and V and for giants of luminosity classes II and III, based on a collection from the literature of about…

Solar and Stellar Astrophysics · Physics 2015-10-28 Yang Huang , Xiao-Wei Liu , Hai-Bo Yuan , Mao-sheng Xiang , Bing-Qiu Chen , Hua-Wei Zhang

M dwarfs are key targets for high-resolution spectroscopic analyses due to a high incidence of these stars in the solar neighbourhood and their importance as exoplanetary hosts. Several methodological challenges make such analyses…

Solar and Stellar Astrophysics · Physics 2021-06-02 T. Olander , U. Heiter , O. Kochukhov

We present synthetic FeH band spectra in the z-filter range for several M-dwarf models with logg=3.0-5.0 [cgs] and Teff=2800K -3450K. Our aim is to characterize convective velocities in M-dwarfs and to give a rough estimate of the range in…

Astrophysics · Physics 2009-11-13 S. Wende , A. Reiners , H. G. Ludwig

Using population synthesis tools we create a synthetic Kepler Input Catalogue (KIC) and subject it to the Kepler Stellar Classification Program (SCP) method for determining stellar parameters such as the effective temperature Teff and…

Solar and Stellar Astrophysics · Physics 2013-06-06 R. Farmer , U. Kolb , A. J. Norton

We present atmospheric parameters for 51 nearby FG dwarfs uniformly distributed over the -2.60 < [Fe/H] < +0.20 metallicity range that is suitable for the Galactic chemical evolution research. Lines of iron, Fe I and Fe II, were used to…

Solar and Stellar Astrophysics · Physics 2015-08-06 T. Sitnova , G. Zhao , L. Mashonkina , Y. Q. Chen , F. Liu , Yu. Pakhomov , K. Tan , M. Bolte , S. Alexeeva , F. Grupp , J. -R. Shi , H. -W. Zhang