Hyperfine Splitting in the VALD Database of Spectral-line Parameters

Abstract

The Vienna Atomic Line Database (VALD) has been supplemented with new data and new functionality -- the possibility of taking into account the effect of hyperfine splitting (HFS) of atomic levels in the analysis of line profiles. This has been done through the creation of an ancillary SQL database with the HFS constants for atomic levels of 58 isotopes of 30 neutral and singly-ionized atoms. The completeness of the collected data and new opportunities for studies of stars of various spectral types is analyzed. The database enables analysis of splitting of up to 60\%\ of lines with measurable effects in the ultraviolet ($\lambda \gtrsim 1000$~Å), and up to 100\%\ of such lines in the optical and infrared ranges ($\lambda \lesssim 25000$~Å) for A--M stars. In the spectra of hot O--B stars, it is necessary to use laboratory measurements for atoms in the second and higher stages of ionization.

arXiv comment8 pages, 4 figures, 3 tables

Cited by in corpus (44)

• HELIOS-K 2.0 Opacity Calculator and Open-source Opacity Database for Exoplanetary Atmospheres
• Constraining atmospheric parameters and surface magnetic fields with $\text{ZeeTurbo}$: an application to SPIRou spectra
• The Effects of Starspots on Spectroscopic Mass Estimates of Low-mass Young Stars
• The PEPSI Exoplanet Transit Survey (PETS) I: Investigating the presence of a silicate atmosphere on the super-Earth 55 Cnc e
• Estimating the atmospheric properties of 44 M dwarfs from SPIRou spectra
• Korg: a modern 1D LTE spectral synthesis package
• Non-LTE abundances of zinc in different spectral type stars and the Galactic [Zn/Fe] trend based on quantum-mechanical data on inelastic processes in zinc-hydrogen collisions
• Spectroscopic r-Process Abundance Retrieval for Kilonovae I: The Inferred Abundance Pattern of Early Emission from GW170817
• Estimating fundamental parameters of nearby M dwarfs from SPIRou spectra
• Chemical diversity among A-B stars with low rotational velocities: non-LTE abundance analysis
• DECH: Software Package for Astronomical Spectral Data Processing and Analysis
• The CARMENES search for exoplanets around M dwarfs: Not-so-fine hyperfine-split vanadium lines in cool star spectra
• The Mantis Network I: A standard grid of templates and masks for cross-correlation analyses of ultra-hot Jupiter transmission spectra
• Detection of Al II in the Ultraviolet Spectra of Metal-Poor Stars: An Empirical LTE Test of NLTE Aluminum Abundance Calculations
• Is T Tauri North a 'Classical' T Tauri star?
• The Pristine Inner Galaxy Survey (PIGS) VII: a discovery of the first inner Galaxy CEMP-r/s star
• Scandium abundances of F-G-K dwarf stars in a wide metallicity range
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VIII. Carbon and oxygen
• The formation of the Milky Way halo and its dwarf satellites: a NLTE-1D abundance analysis. IV. Segue 1, Triangulum II, and Coma Berenices UFDs
• Detailed abundances of the wide pairs of stars with and without planets: the binary systems 16 Cyg and HD 219542
• KilonovAE: Exploring Kilonova Spectral Features with Autoencoders
• V772 Cas: an ellipsoidal HgMn star in an eclipsing binary
• Unlocking the mystery of Sr synthesis in the early Galaxy through analysis of barium isotopes in very metal-poor stars
• A free-floating-planet microlensing event caused by a Saturn-mass object
• Doppler imaging of a southern ApSi star HD 152564
• Chromaticity of stellar activity in radial velocities : Anti-correlated families of lines on the M dwarf EV Lac with SPIRou and SOPHIE
• A comprehensive study of the relations between the properties of planetary systems and the chemical compositions of their host stars
• BD+30${}^{\circ }$549: young helium-weak silicon star in NGC 1333 star-forming region
• Instability in the system of the distant post-AGB star LS III+52 24 (IRAS 22023+5249)
• Fundamental parameters and abundance analysis of the components in the SB2 system HD 60803
• Slowly Rotating Peculiar Star BD+00${}^{\circ }$1659 as a Benchmark for Stratification Studies in Ap/Bp Stars
• The R-Process Alliance: Hunting for gold in the near-UV spectrum of 2MASS J05383296-5904280
• Confident Detection of Doubly-Ionized Thorium in the Extreme Ap Star CPD-62 2717
• Abundance analysis of benchmark M dwarfs
• HD 34736: An intensely magnetised double-lined spectroscopic binary with rapidly-rotating chemically peculiar B-type components
• Distinct barium isotope ratios in CEMP-s and CEMP-rs stars
• Chemical abundances and doppler imaging of the Ap Si/He-wk star HD 100357
• A.C.I.D -- An Improved LSD Technique for Accurate Line Profile Retrieval
• Revisiting $\epsilon$ Eridani with NEID: Identifying New Activity-Sensitive Lines in a Young K Dwarf Star
• Ba Isotope Ratio in CEMP-s and CEMP-rs Stars as a Signature of s-Process and i-Process
• An Hα Transit of HD 189733b to Assess Stellar Activity Across the Transit Chord Close to JWST Observations
• A critical evaluation of the elemental abundances and evolutionary status of 15 Vul (HD 189849): The first identification of an evolved Am star
• A rare phosphorus-rich star in an eclipsing binary from TESS
• The R-Process Alliance: A Nearly Complete R-Process Abundance Template Derived from Ultraviolet Spectroscopy of the R-Process-Enhanced Metal-Poor Star HD 222925