HECATEv2: An all-sky galaxy catalogue for multimessenger astrophysics
E. Kyritsis, A. Zezas, K. Kovlakas, C. Daoutis, K. Kouroumpatzakis, A. Hornschemeier, A. Basu-Zych

TL;DR
HECATEv2 is a comprehensive all-sky galaxy catalogue with extensive photometric, spectroscopic, and derived data, designed to support multimessenger astrophysics research.
Contribution
This work provides a significantly upgraded, multi-wavelength galaxy catalogue with improved data quality, expanded coverage, and new derived parameters, enhancing its utility for astrophysical studies.
Findings
Includes 204,733 galaxies with detailed photometry and classifications.
Provides stellar masses, star-formation rates, and metallicities for most galaxies.
Offers spatial completeness maps and broad coverage compared to other catalogues.
Abstract
We present HECATEv2, the second release of the Heraklion Extragalactic Catalogue (HECATE), an all-sky, value-added galaxy catalogue comprising 204733 galaxies from the HyperLEDA database with recession velocity <14000 km/s (D~200 Mpc). This release focuses on qualitative upgrades of the provided information while maintaining the same parent galaxy sample as HECATEv1. Improvements include a new cosmology-based distance framework, expanded and homogenised optical and mid-infrared photometry from SDSS-DR17/NSA, PS1-DR2, and AllWISE, and new quality-control flags for stellar contamination, incorrect photometry, and coordinate inconsistencies. We also extend the galaxy-size coverage and derive stellar population parameters for a substantially larger fraction of the sample. Star-formation rates (SFR) and stellar masses (Mstar) are now available for >70% of galaxies using updated…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Gamma-ray bursts and supernovae
