Primary Red Clump Star Catalog from Gaia DR3 XP Spectra (Tier 1 & Tier 2)
Zheng Yu ; Bingqiu Chen
This dataset provides two complementary all-sky catalogs of primary red clump (RC) stars derived from Gaia DR3 low-resolution BP/RP (XP) spectra. A mixture density network (MDN), trained using the erratum-corrected asteroseismic cross-matched catalog of Ting et al. (2018), infers spectroscopic estimates of ΔΠ1, the asymptotic period spacing of dipole gravity modes, and Δν, the large frequency separation, from each 343-dimensional corrected XP spectrum. Primary RC stars are selected using ΔΠ1_pred ≥ 250 s and Δν_pred < 5.5 μHz, together with thresholds on the width of the selected ΔΠ1 Gaussian component. The high-purity Tier 1 catalog contains 532,189 stars with 97% purity, while the high-completeness Tier 2 catalog contains 6,534,931 stars with 86% completeness and 84% purity. Both catalogs include Gaia DR3 astrometry, atmospheric parameters from Zhang and Green (2025), MDN-inferred seismic parameters, selected-component widths, the mixing weight of the selected ΔΠ1 component, Ks-band extinction, calibrated absolute magnitude, and photometric distance with its uncertainty. The median photometric distance precision is approximately 6% for Tier 1. The catalogs provide homogeneous, full-sky tracer samples for studies of Galactic structure, chemical evolution, stellar populations, and dynamics.
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Paper Information
Paper Title:
An All-Sky Catalog of 6.5 Million Primary Red Clump Stars from Gaia DR3 XP Spectra
Publication:
The Astrophysical Journal Supplement Series
Identifiers
CSTR:
11379.11.101871
DOI:
10.12149/101871
VO Identifier:
ivo://China-VO/paperdata/101871
Publication Date:
2026-09-01
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Citations
Zheng Yu, Bingqiu Chen. Primary Red Clump Star Catalog from Gaia DR3 XP Spectra (Tier 1 & Tier 2)[DS/OL]. 1.0. National Astronomical Data Center, 2026[2026-09-10]. https://doi.org/10.12149/101871.
BibTeX
@misc{10.12149/101871,
doi = {10.12149/101871},
url = {https://doi.org/10.12149/101871},
author = {Zheng Yu},
title = {Primary Red Clump Star Catalog from Gaia DR3 XP Spectra (Tier 1 & Tier 2)},
version = {1.0},
publisher = {National Astronomical Data Center of China},
year= {2026}
}
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2026-09-01