2014
DOI: 10.1088/0004-637x/787/2/142
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Abstract: We demonstrate how the metallicities of young super star clusters can be measured using novel spectroscopic techniques in the J-band. The near-infrared flux of super star clusters older than ∼6 Myr is dominated by tens to hundreds of red supergiant stars. Our technique is designed to harness the integrated light of that population and produces accurate metallicities for new observations in galaxies above (M83) and below (NGC 6946) solar metallicity. In M83 we find [Z] = +0.28 ± 0.14 dex using a moderate resolu… Show more

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Cited by 39 publications
(72 citation statements)
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“…Stellar parameters (metallicity, effective temperature, surface gravity, and microturbulence) have been derived using the Jband analysis technique described by Davies et al (2010) and demonstrated by Gazak et al (2014a) and Davies et al (2015). To estimate physical parameters, this technique uses a grid of synthetic spectra to fit observational data, in which the models are degraded to the resolution of the observed spectra ( Table 1).…”
Section: Resultsmentioning
confidence: 99%
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“…Stellar parameters (metallicity, effective temperature, surface gravity, and microturbulence) have been derived using the Jband analysis technique described by Davies et al (2010) and demonstrated by Gazak et al (2014a) and Davies et al (2015). To estimate physical parameters, this technique uses a grid of synthetic spectra to fit observational data, in which the models are degraded to the resolution of the observed spectra ( Table 1).…”
Section: Resultsmentioning
confidence: 99%
“…A signal-to-noise ratio (S/N) of 100 per resolution element is required for satisfactory results from this analysis method (see Gazak et al 2014a). We estimated the S/N of the spectra by comparing the counts in the brightest spatial pixels (within the 1.15-1.22 μm region) of each source with the counts in equivalent spatial pixels in the corresponding sky exposures (between the sky lines).…”
Section: Kmos Observationsmentioning
confidence: 99%
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“…The average spectral type for RSGs in the Milky Way is M 2 (Levesque & Massey 2012). The disk metallicity of M 83 was shown to be 1.9× Solar by Gazak et al (2014). Thus, we may expect the average spectral type of an M 83 disk RSG to be M 2 or later.…”
Section: B-vmentioning
confidence: 97%