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Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models

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Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models. / Maraston, C.; Hill, L.; Thomas, D.; Yan, R.; Chen, Y.; Lian, J.; Parikh, T.; Neumann, J.; Meneses-Goytia, S.; Bershady, M.; Drory, N.; Bizyaev, D.; Concas, A.; Brownstein, J.; Lazarz, D.; Stringfellow, G.; Stassun, K.

In: Monthly Notices of the Royal Astronomical Society, 02.06.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

Maraston, C, Hill, L, Thomas, D, Yan, R, Chen, Y, Lian, J, Parikh, T, Neumann, J, Meneses-Goytia, S, Bershady, M, Drory, N, Bizyaev, D, Concas, A, Brownstein, J, Lazarz, D, Stringfellow, G & Stassun, K 2020, 'Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models', Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/staa1489

APA

Maraston, C., Hill, L., Thomas, D., Yan, R., Chen, Y., Lian, J., Parikh, T., Neumann, J., Meneses-Goytia, S., Bershady, M., Drory, N., Bizyaev, D., Concas, A., Brownstein, J., Lazarz, D., Stringfellow, G., & Stassun, K. (2020). Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/staa1489

Vancouver

Author

Maraston, C. ; Hill, L. ; Thomas, D. ; Yan, R. ; Chen, Y. ; Lian, J. ; Parikh, T. ; Neumann, J. ; Meneses-Goytia, S. ; Bershady, M. ; Drory, N. ; Bizyaev, D. ; Concas, A. ; Brownstein, J. ; Lazarz, D. ; Stringfellow, G. ; Stassun, K. / Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models. In: Monthly Notices of the Royal Astronomical Society. 2020.

Bibtex

@article{870ca89edae3456cb963edce0dd2a91c,
title = "Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models",
abstract = "We use the first release of the SDSS/MaStar stellar library comprising ∼9000, high S/N spectra, to calculate integrated spectra of stellar population models. The models extend over the wavelength range 0.36-1.03 μ and share the same spectral resolution (⁠R∼1800R ∼1800⁠) and flux calibration as the SDSS-IV/MaNGA galaxy data. The parameter space covered by the stellar spectra collected thus far allows the calculation of models with ages and chemical composition in the range t > 200Myr, −2 <= [Z/H] <= +0.35⁠, which will be extended as MaStar proceeds. Notably, the models include spectra for dwarf Main Sequence stars close to the core H-burning limit, as well spectra for cold, metal-rich giants. Both stellar types are crucial for modelling λ > 0.7μ absorption spectra. Moreover, a better parameter coverage at low metallicity allows the calculation of models as young as 500 Myr and the full account of the Blue Horizontal Branch phase of old populations. We present models adopting two independent sets of stellar parameters (Teff, logg, [Z/H]). In a novel approach, their reliability is tested 'on the fly' using the stellar population models themselves. We perform tests with Milky Way and Magellanic Clouds globular clusters, finding that the new models recover their ages and metallicities remarkably well, with systematics as low as a few per cent for homogeneous calibration sets. We also fit a MaNGA galaxy spectrum, finding residuals of the order of a few per cent comparable to the state-of-art models, but now over a wider wavelength range.",
keywords = "astro-ph.SR, astro-ph.GA, galaxies: stellar content, galaxies: evolution, stars: fundamental parameters stars: evolution, star clusters: fundamental parameters, RCUK, STFC, ST/S000550/1",
author = "C. Maraston and L. Hill and D. Thomas and R. Yan and Y. Chen and J. Lian and T. Parikh and J. Neumann and S. Meneses-Goytia and M. Bershady and N. Drory and D. Bizyaev and A. Concas and J. Brownstein and D. Lazarz and G. Stringfellow and K. Stassun",
note = "37 pages, 31 figures, MNRAS in press, models available at http://www.icg.port.ac.uk/mastar",
year = "2020",
month = jun,
day = "2",
doi = "10.1093/mnras/staa1489",
language = "English",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",

}

RIS

TY - JOUR

T1 - Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models

AU - Maraston, C.

AU - Hill, L.

AU - Thomas, D.

AU - Yan, R.

AU - Chen, Y.

AU - Lian, J.

AU - Parikh, T.

AU - Neumann, J.

AU - Meneses-Goytia, S.

AU - Bershady, M.

AU - Drory, N.

AU - Bizyaev, D.

AU - Concas, A.

AU - Brownstein, J.

AU - Lazarz, D.

AU - Stringfellow, G.

AU - Stassun, K.

N1 - 37 pages, 31 figures, MNRAS in press, models available at http://www.icg.port.ac.uk/mastar

PY - 2020/6/2

Y1 - 2020/6/2

N2 - We use the first release of the SDSS/MaStar stellar library comprising ∼9000, high S/N spectra, to calculate integrated spectra of stellar population models. The models extend over the wavelength range 0.36-1.03 μ and share the same spectral resolution (⁠R∼1800R ∼1800⁠) and flux calibration as the SDSS-IV/MaNGA galaxy data. The parameter space covered by the stellar spectra collected thus far allows the calculation of models with ages and chemical composition in the range t > 200Myr, −2 <= [Z/H] <= +0.35⁠, which will be extended as MaStar proceeds. Notably, the models include spectra for dwarf Main Sequence stars close to the core H-burning limit, as well spectra for cold, metal-rich giants. Both stellar types are crucial for modelling λ > 0.7μ absorption spectra. Moreover, a better parameter coverage at low metallicity allows the calculation of models as young as 500 Myr and the full account of the Blue Horizontal Branch phase of old populations. We present models adopting two independent sets of stellar parameters (Teff, logg, [Z/H]). In a novel approach, their reliability is tested 'on the fly' using the stellar population models themselves. We perform tests with Milky Way and Magellanic Clouds globular clusters, finding that the new models recover their ages and metallicities remarkably well, with systematics as low as a few per cent for homogeneous calibration sets. We also fit a MaNGA galaxy spectrum, finding residuals of the order of a few per cent comparable to the state-of-art models, but now over a wider wavelength range.

AB - We use the first release of the SDSS/MaStar stellar library comprising ∼9000, high S/N spectra, to calculate integrated spectra of stellar population models. The models extend over the wavelength range 0.36-1.03 μ and share the same spectral resolution (⁠R∼1800R ∼1800⁠) and flux calibration as the SDSS-IV/MaNGA galaxy data. The parameter space covered by the stellar spectra collected thus far allows the calculation of models with ages and chemical composition in the range t > 200Myr, −2 <= [Z/H] <= +0.35⁠, which will be extended as MaStar proceeds. Notably, the models include spectra for dwarf Main Sequence stars close to the core H-burning limit, as well spectra for cold, metal-rich giants. Both stellar types are crucial for modelling λ > 0.7μ absorption spectra. Moreover, a better parameter coverage at low metallicity allows the calculation of models as young as 500 Myr and the full account of the Blue Horizontal Branch phase of old populations. We present models adopting two independent sets of stellar parameters (Teff, logg, [Z/H]). In a novel approach, their reliability is tested 'on the fly' using the stellar population models themselves. We perform tests with Milky Way and Magellanic Clouds globular clusters, finding that the new models recover their ages and metallicities remarkably well, with systematics as low as a few per cent for homogeneous calibration sets. We also fit a MaNGA galaxy spectrum, finding residuals of the order of a few per cent comparable to the state-of-art models, but now over a wider wavelength range.

KW - astro-ph.SR

KW - astro-ph.GA

KW - galaxies: stellar content

KW - galaxies: evolution

KW - stars: fundamental parameters stars: evolution

KW - star clusters: fundamental parameters

KW - RCUK

KW - STFC

KW - ST/S000550/1

U2 - 10.1093/mnras/staa1489

DO - 10.1093/mnras/staa1489

M3 - Article

JO - MNRAS

JF - MNRAS

SN - 0035-8711

ER -

ID: 21265081