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29 March 2024
 
  » arxiv » 1908.2330

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Resolved and Integrated Stellar Masses in the SDSS-IV/MaNGA Survey, Paper I: PCA spectral fitting & stellar mass-to-light ratio estimates
Zachary J. Pace ; Christy Tremonti ; Yanmei Chen ; Adam L. Schaefer ; Matthew A. Bershady ; Kyle B. Westfall ; Joel Brownstein ; Niv Drory ; Mederic Boquien ; Kate Rowlands ; Brett Andrews ; David Wake ;
Date 6 Aug 2019
AbstractWe present a method of fitting optical spectra of galaxies using a basis set of six vectors obtained from principal component analysis (PCA) of a library of synthetic spectra of 40000 star formation histories (SFHs). Using this library, we provide estimates of resolved effective stellar mass-to-light ratio ($log Upsilon^*$) for thousands of galaxies from the SDSS-IV/MaNGA integral-field spectroscopic survey. Using a testing framework built on additional synthetic SFHs, we show that the estimates of stellar mass-to-light ratio are reliable (as are their uncertainties) at a variety of signal-to-noise ratios, stellar metallicities, and dust attenuation conditions. Finally, we describe the future release of the resolved stellar mass-to-light ratios as a SDSS-IV/MaNGA Value-Added Catalog (VAC) and provide a link to the software used to conduct this analysis.
Source arXiv, 1908.2330
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