Parameters of 220 million stars from Gaia BP/RP (XP) spectra

We present astrophysical parameters of 220 million stars, based on Gaia XP spectra and near-infrared photometry from 2MASS and WISE. Instead of using ab initio stellar models, we develop a data-driven model of Gaia XP spectra as a function of the stellar parameters, with a few straightforward built-in physical assumptions. This resource is a VO re-publication of the resulting catalog of stellar parameters. For bulk downloads, the covariances, the trained model, and more, see https://zenodo.org/record/7811871.

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/org.gavo.dc/xpparams/q/cone
Related Identifier http://dc.zah.uni-heidelberg.de/xpparams/q/cone/info
Related Identifier http://dc.zah.uni-heidelberg.de/xpparams/q/cone/form
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://org.gavo.dc/xpparams/q/cone
Provenance
Creator Zhang, Xiangyu; Green, Gregory M.; Rix, Hans-Walter
Instrument Gaia RP/BP Spectrometer
Publisher The GAVO DC team
Publication Year 2023
OpenAccess true
Contact GAVO Data Center Team <gavo(at)ari.uni-heidelberg.de>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy