J/A+A/706/A318 Gothard Obs. Synthetic Stellar Phot. Database (Kovacs+, 2026)
The Gothard Observatory Synthetic Stellar Photometry Database.
Kovacs J., Meszaros Sz., Harmati B., Cseh B., Hegedus V., Szabo Gy.M.,
Szigeti L., Vilagos B., Derekas A.
<Astron. Astrophys. 706, A318 (2026)>
=2026A&A...706A.318K 2026A&A...706A.318K (SIMBAD/NED BibCode)
ADC_Keywords: Models ; Magnitudes, absolute ; Sun
Keywords: techniques: photometric - techniques: spectroscopic -
stars: abundances - stars: fundamental parameters
Abstract:
To determine stellar luminosities and radii, it is necessary
to know the total bolometric fluxes emitted by the stars, or
equivalently the bolometric corrections (BCs) as accurately as
possible.
The aim of this paper is to present and describe a new database of
synthetic stellar magnitudes and bolometric corrections for 752
filters from 78 ground- and space-based instruments calculated using
the most recent version of the BOSZ synthetic stellar spectral
library.
From the entire grid of the BOSZ theoretical spectra, our synthetic
magnitudes in the Vega magnitude system were determined using the
corresponding routines of the Python package species.
The database spans effective temperatures from 2800 to 16000K, logg
from -0.5 to 5.5, metallicities from -2.5 to 0.75, [alpha/M] from
-0.25 to 0.5, [C/M] from -0.75 to 0.5, and reddening up to AV=3.1mag.
Using high-resolution (R=50000) synthetic spectra allowed us to
precisely track the effect of abundances on the bolometric corrections
and luminosity of stars.
By applying the new bolometric corrections (BCs) to 192 000 APOGEE
stars we calculated luminosities, and also demonstrated that
neglecting carbon can introduce up to ±0.2% errors in luminosity.
The new Gothard Observatory Synthetic Stellar Photometry Database may
enable more accurate fundamental parameter determinations for large
stellar samples using a vast amount of past, present, and upcoming
surveys, such as Gaia, LSST, and the Roman Space Telescope.
Description:
Synthetic magnitudes and bolometric corrections of the Sun through 752
filters of ground- and space-based instruments.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 46 752 Synthetic magnitudes and bolometric corrections
of the Sun
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 28 A28 --- Filter Filter ID
30- 37 F8.5 mag MAG [3.26/10.26] Absolute magnitude
39- 46 F8.5 mag BC [-5.53/1.47] Bolometric correction
--------------------------------------------------------------------------------
Acknowledgements:
Jozsef Kovacs, jkovacs(at)gothard.hu
(End) Patricia Vannier [CDS] 26-Dec-2025