Abstract
Gaia Data Release 3 provides over two hundred million stars with Gaia Bp/Rp spectrophotometry, and systematics in the fluxes of Bp/Rp spectra have also been characterized. We use GaiaXPy to calibrate Bp/Rp spectra and apply Neural Network to correct the Bp/Rp fluxes according to stellar colors, magnitudes, and interstellar extinction. Then we use FERRE to fit Bp/Rp spectra with model spectra to derive the atmospheric parameters. Our correction increases the precision of the relative spectrophotometry of the Bp/Rp data and the estimation of derived atmospheric parameters. Based on the comparison with APOGEE parameters, we conclude that our estimated parameters have systematic errors and uncertainties in Teff, logg, and [M/H] about -38+/-167K, 0.05+/-0.40dex, and -0.12+/-0.19dex, respectively, for stars in the range 4000<=Teff<=7000K. A catalog of atmospheric parameters within this effective temperature range has been built, comprising 68394431 sources, along with a subset of 124188 stars with [M/H]<=-2.5. More details can be found in our corresponding paper. (2 data files).Details
| Publication | VizieR On-line Data Catalog: J/A+A/695/A75. Originally published in: 2025A&A...695A..75Y |
| Publication Date | February 2025 |
| Bibcode | 2025yCat..36950075Y |
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| Comment(s) | catalog.dat 68394431x68 General catalog containing atmospheric parameters; met-poor.dat 124188x298 Metal-poor subset of the general catalog |