Gaia-EDR3 Parallax Distances to the Great Carina Nebula and its Star Clusters (Trumpler 14, 15, 16)
Michael Shull, Jeremy Darling, and Charles Danforth (Univ. of, Colorado)

TL;DR
This study uses Gaia-EDR3 data to accurately measure distances to stars and clusters in the Carina Nebula, refining previous estimates and analyzing their dynamics and structure.
Contribution
First precise Gaia-EDR3 parallax-based distances for stars and clusters in the Carina Nebula, improving upon DR2 and enabling detailed dynamical and structural analysis.
Findings
Carina Nebula stars are at ~2.35 kpc distance
Clusters have consistent distances around 2.3 kpc
Estimated cluster sizes and dynamical timescales
Abstract
Using offset-corrected Gaia-EDR3 parallax measurements and spectrophotometric methods, we have determined distances for 69 massive stars in the Carina OB1 association and associated clusters: Trumpler 16 (21 stars), Trumpler 14 (20 stars), Trumpler 15 (3 stars), Bochum 11 (5 stars), and South Pillars region (20 stars). Past distance estimates to the Carina Nebula range from 2.2 to 3.6 kpc, with uncertainties arising from photometry and anomalous dust extinction. The EDR3 parallax solutions show considerable improvement over DR2, with typical errors ~3-5%. The O-type stars in the Great Carina Nebula lie at essentially the same distance ( kpc), quoting mean and rms variance. The clusters have distances of kpc (Tr 16), kpc (Tr 14), kpc (Tr 15), and kpc (Bochum 11) in good agreement with the…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astrophysics and Star Formation Studies · Astro and Planetary Science
