J/other/RNAAS/8.227 UCD Benchmarks with Detailed Abundances (Fisher+, 2024) ================================================================================ New sample of Ultracool Dwarf Benchmarks with detailed chemical characterization. Fisher L., Gerasimov R., Kirby E.N., Burgasser A.J., Hsu C., Weiss L.M. =2024RNAAS...8..227F (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, brown dwarf ; Abundances ; Effective temperatures ; Photometry ; Optical Keywords: spectroscopy - brown dwarfs - chemical abundances - Galactic archaeology Abstract: Ultracool dwarfs (UCDs) are considered prime targets for galactic archeology due to their abundance, long lifespans, and the sensitivity of their spectra to chemical composition. To calibrate larger surveys, a sample of benchmark UCDs with robust abundances is necessary. We tabulate metallicities, alpha-enhancements and abundances of 13 elements, inferred from high-resolution spectra of 13 FGK primaries hosting a UCD companion. Description: Ultracool dwarfs (UCDs) are considered prime targets for galactic archeology due to their abundance, long lifespans, and the sensitivity of their spectra to chemical composition. To calibrate larger surveys, a sample of benchmark UCDs with robust abundances is necessary. We tabulate metallicities, alpha-enhancements and abundances of 13 elements, inferred from high-resolution spectra of 13 FGK primaries hosting a UCD companion. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table.dat 941 13 Stellar parameters and chemical abundances of FGK primaries hosting UCD companions -------------------------------------------------------------------------------- See also: I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) Byte-by-byte Description of file:table.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 15 A15 --- PName Simbad identifier of primary 17- 33 A17 --- SName 2MASS identifier of secondary 35- 53 I19 --- PGaia Gaia DR3 Source of primary (1) 55- 73 I19 --- SGaia Gaia DR3 Source of secondary (1) 75- 83 F9.7 mag PGmag Gaia DR3 Gmag of primary (1) 85-104 F20.18 mag e_PGmag Error in PGmag (1) 106-114 F9.6 mag SGmag Gaia DR3 Gmag of secondary (1) 116-135 F20.18 mag e_SGmag Error in SGmaG (1) 137-146 F10.8 mag PBP-RP Gaia DR3 BP-RP of primary (1) 148-167 F20.18 mag e_PBP-RP Error in PBP-RP (1) 169-177 F9.7 mag SBP-RP Gaia DR3 BP-RP of secondary (1) 179-197 F19.17 mag e_SBP-RP Error in SBP-RP (1) 199-217 F19.16 mas Pplx Gaia DR3 parallax of primary (1) 219-224 F6.1 K STeff SANDee photometric estimate of Teff of secondary (2) 226-242 F17.12 K Teff Best-fit Teff 244-262 F19.16 K e_Teff Error in Teff 264-281 F18.16 [cm/s2] logg Best-fit log(g) 283-302 F20.18 [cm/s2] e_logg Error in logg 304-323 F20.17 [-] [Fe/H] Best-fit [Fe/H] 325-344 F20.18 [-] e_[Fe/H] Error in [Fe/H] 346-365 F20.18 [-] [alpha/Fe] Best-fit [alpha/Fe] 367-386 F20.18 [-] e_[alpha/Fe] Error in [alpha/Fe] 388-407 F20.17 [-] [Ba/Fe] Best-fit [Ba/Fe] 409-428 F20.18 [-] e_[Ba/Fe] Error in [Ba/Fe] 430-449 F20.17 [-] [Eu/Fe] Best-fit [Eu/Fe] 451-469 F19.17 [-] e_[Eu/Fe] Error in [Eu/Fe] 471-491 F21.18 [-] [Mg/alpha] Best-fit [Mg/alpha] 493-512 F20.18 [-] e_[Mg/alpha] Error in [Mg/alpha] 514-534 F21.18 [-] [Si/alpha] Best-fit [Si/alpha] 536-555 F20.18 [-] e_[Si/alpha] Error in [Si/alpha] 557-577 F21.18 [-] [Ca/alpha] Best-fit [Ca/alpha] 579-598 F20.18 [-] e_[Ca/alpha] Error in [CA/alpha] 600-620 F21.18 [-] [Ti/alpha] Best-fit [TI/alpha] 622-641 F20.18 [-] e_[Ti/alpha] Error in [TI/alpha] 643-663 F21.18 [-] [Ni/Fe] Best-fit [Ni/Fe] 665-684 F20.18 [-] e_[Ni/Fe] Error in [NI/Fe] 686-706 F21.18 [-] [Na/Fe] Best-fit [Na/Fe] 708-727 F20.18 [-] e_[Na/Fe] Error in [Na/Fe] 729-750 E22.14 [-] [Mn/Fe] Best-fit [Mn/Fe] 752-771 F20.18 [-] e_[Mn/Fe] Error in [Mn/Fe] 773-793 F21.18 [-] [Co/Fe] Best-fit [Co/Fe] 795-814 F20.18 [-] e_[Co/Fe] Error in [Co/Fe] 816-835 F20.17 [-] [Li/Fe] Best-fit [Li/Fe] 837-856 F20.18 [-] e_[Li/Fe] Error in [Li/Fe] 858-878 F21.18 [-] [Al/Fe] Best-fit [Al/Fe] 880-899 F20.18 [-] e_[Al/Fe] Error in [Al/Fe] 901-921 F21.18 [-] [K/Fe] Best-fit [K/Fe] 923-941 F19.17 [-] e_[K/Fe] Error in [K/Fe] -------------------------------------------------------------------------------- Note (1): Data from cross-match with Gaia DR3 (Cat. I/355). Note (2): SANDee are evolutionary models from Gerasimov et al. (2024ApJ...971...65G). -------------------------------------------------------------------------------- Acknowledgements: Roman Gerasimov, rgerasim(at)nd.edu ================================================================================ (End) Patricia Vannier [CDS] 23-Sep-2024