The Massive Star Content of NGC 3603
Nicholas W. Melena, Philip Massey, Nidia I. Morrell, and Amanda M., Zangari
TL;DR
This study provides a detailed spectral and photometric analysis of the massive star population in NGC 3603, improving distance estimates and understanding of stellar properties in this nearby giant H II region.
Contribution
It presents new spectroscopic data for 16 previously unobserved stars and refines the cluster's distance and stellar characteristics using combined spectral and photometric analysis.
Findings
Spectroscopy of 26 stars, including 16 new observations.
Refined distance measurement to NGC 3603.
Constructed an H-R diagram to analyze star masses and ages.
Abstract
We investigate the massive star content of NGC 3603, the closest known giant H II region. We have obtained spectra of 26 stars in the central cluster using the Baade 6.5-m telescope (Magellan I). Of these 26 stars, 16 had no previous spectroscopy. We also obtained photometry of all of the stars with previous or new spectroscopy, primarily using archival HST ACS/HRC images. We use these data to derive an improved distance to the cluster, and to construct an H-R diagram for discussing the masses and ages of the massive star content of this cluster.
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