Blue Supergiants in the Pinwheel Galaxy M101: Comparison with H II Region Chemical Abundances, Spectroscopic Distance, and an Independent Determination of the Hubble Constant

We present a quantitative spectroscopic study of 13 blue supergiant stars in the Pinwheel Galaxy M101, based on data obtained with the Low Resolution Imaging Spectrometer available at the Keck I telescope. The average stellar metallicity decreases from ∼1.9 Z _⊙ near the center of the galaxy to ∼0.3...

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Bibliographic Details

Published in:	The Astrophysical Journal
Main Authors:	Fabio Bresolin, Rolf-Peter Kudritzki, Miguel A. Urbaneja, Eva Sextl, Adam G. Riess
Format:	Article
Language:	English
Published:	IOP Publishing 2025-01-01
Subjects:	Stellar abundances Galaxy abundances Galaxy stellar content Stellar distance Hubble constant Supergiant stars
Online Access:	https://doi.org/10.3847/1538-4357/adfc4c