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.
Files
.. README.txt
11.51 kB
..
.. Tier2.fits
747.88 MB
..
.. Tier1.fits
60.92 MB
..
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
Usage Statistics
Total Downloads
61
Citations
GB/T 7714-2015

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}
}
Versions
Version 1.0 (current)
2026-09-01
Main
This DOI represents all versions, and will always resolve to the latest one.
2026-09-01