PEPSI deep spectra. II. Gaia benchmark stars and other M-K standards

@article{Strassmeier2017PEPSIDS,
  title={PEPSI deep spectra. II. Gaia benchmark stars and other M-K standards},
  author={Klaus G. Strassmeier and Ilya V. Ilyin and M. Weber},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2017}
}
We provide a homogeneous library of high-resolution, high-S/N spectra for 48 bright AFGKM stars, some of them approaching the quality of solar-flux spectra. Our sample includes the northern Gaia benchmark stars, some solar analogs, and some other bright Morgan-Keenan (M-K) spectral standards. Well-exposed deep spectra were created by average-combining individual exposures. The data-reduction process relies on adaptive selection of parameters by using statistical inference and robust estimators… 
Benchmark stars, benchmark spectrographs
Gaia benchmark stars are selected to be calibration stars for different spectroscopic surveys. Very high-quality and homogeneous spectroscopic data for these stars are therefore required. We
Probing the atmosphere of HD189733b with the Na i and K i lines
High spectral resolution transmission spectroscopy is a powerful tool to characterize exoplanet atmospheres. Especially for hot Jupiters, this technique is highly relevant, due to their
Want a PEPSI? Performance status of the recently commissioned high-resolution spectrograph and polarimeter for the 2x8.4m Large Binocular Telescope
PEPSI is the new fiber-fed and stabilized “Potsdam Echelle Polarimetric and Spectroscopic Instrument” for the Large Binocular Telescope (LBT). It covers the entire optical wavelength range from 384
Mapping EK Draconis with PEPSI
Aims. We present the first temperature surface map of EK Dra from very-high-resolution spectra obtained with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large
Carbon 12C/13C isotope ratio of α Aurigae revised
Context. Capella (α Aur) is one of the few binaries in the sky with two cool giant stars. With spectral types of G8III and G0III, the two components appear at different but distinct stages in their
Spatially resolved spectroscopy across stellar surfaces
Context. High-precision stellar analyses require hydrodynamic 3D modeling. Such models predict changes across stellar disks of spectral line shapes, asymmetries, and wavelength shifts. For testing
Non-LTE analysis of K I in late-type stars
Context. Older models of Galactic chemical evolution (GCE) predict [K/Fe] ratios as much as 1 dex lower than those inferred from stellar observations. Abundances of potassium are mainly based on
The potassium absorption on HD189733b and HD209458b
In this work, we investigate the potassium excess absorption around 7699 Å of the exoplanets HD189733b and HD209458b. For this purpose, we used high-spectral resolution transit observations
Application of convolutional neural networks for stellar spectral classification
TLDR
This work proposes an automated approach for the classification of stellar spectra in the optical region using convolutional neural networks (CNNs), and shows that using CNNs, it is able to lower the error up to 1.23 spectral subclasses as compared to that of two subclasses achieved in the past studies with ML approach.
NLTE for APOGEE: simultaneous multi-element NLTE radiative transfer
Context. Relaxing the assumption of local thermodynamic equilibrium (LTE) in modelling stellar spectra is a necessary step to determine chemical abundances to better than about 10% in late-type
...
...

References

SHOWING 1-10 OF 67 REFERENCES
The Gaia FGK benchmark stars - High resolution spectral library
Context. An increasing number of high-resolution stellar spectra is available today thanks to many past and ongoing spectroscopic surveys. Consequently, numerous methods have been developed to
The Gaia-ESO Survey: the analysis of high-resolution UVES spectra of FGK-type stars
Context. The ongoing Gaia-ESO Public Spectroscopic Survey is using FLAMES at the VLT to obtain high-quality medium-resolution Giraffe spectra for about 10(5) stars and high-resolution UVES spectra
Gaia FGK benchmark stars: Metallicity
Context. To calibrate automatic pipelines that determine atmospheric parameters of stars, one needs a sample of stars, or “benchmark stars”, with well-defined parameters to be used as a reference.
Benchmark stars for Gaia Fundamental properties of the Population II star HD 140283 from interferometric, spectroscopic, and photometric data
Metal-poor halo stars are important astrophysical laboratories that allow us to unravel details about many aspects of astrophysics, including the chemical conditions at the formation of our Galaxy,
A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey
We perform an analysis of spectra and photometry for 22,770 stars included in the third data release (DR3) of the Sloan Digital Sky Survey (SDSS). We derive atmospheric parameters and distances. Our
A frequency comb calibrated solar atlas
Context. The solar spectrum is a primary reference for the study of physical processes in stars and their variation during activity cycles. High resolution spectra of the Sun are easily obtained from
High-resolution abundance analysis of very metal-poor r-I stars
Moderately r-process-enriched stars (r-I) are at least four times as common as those that are greatly enriched in r-process elements (r-II), and the abundances in their atmospheres are important
Gaia FGK benchmark stars: Effective temperatures and surface gravities
Context. In the era of large Galactic stellar surveys, carefully calibrating and validating the data sets has become an important and integral part of the data analysis. Moreover, new generations of
BESO échelle spectroscopy of solar-type stars at Cerro Armazones
The Bochum Echelle Spectroscopic Observer BESO is a fibre-fed high-resolution spectrograph for the 1.5-m Hexapod Telescope at the Cerro Armazones Observatory in the Atacama desert in Chile. Here we
Inversion of stellar fundamental parameters from ESPaDOnS and Narval high-resolution spectra
The general context of this study is the inversion of stellar fundamental parameters from high-resolution Echelle spectra. We aim at developing a fast and reliable tool for the post-processing of
...
...