Medium-resolution Isaac Newton Telescope library of empirical spectra

Sánchez‐Blázquez, P.; Peletier, Reynier F.; Jiménez-Vicente, J.; Cardiel, N.; Cenarro, A. J.; Falcón-Barroso, J.; Gorgas, J.; Selam, S. O.; Vazdekis, Alexandre

doi:10.1111/j.1365-2966.2006.10699.x

Cited by 1,444 publications

(1,377 citation statements)

References 69 publications

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“…We make use of the Pipe3D pipeline (Sánchez et al 2016a) to model the stellar continuum with 156 templates with 39 ages and 4 stellar populations that were extracted from a combination of the synthetic stellar spectra from the GRANADA library (Martins et al 2005) and the MILES project (Sánchez-Blázquez et al 2006;Vazdekis et al 2010;Falcón-Barroso et al 2011). Details of the fitting procedures are described in Sánchez et al (2016b).…”

Section: Manga Targetsmentioning

confidence: 99%

SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA

Lin

Belfiore

Pan

et al. 2017

ApJ

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We study the role of cold gas in quenching star formation in the green valley by analyzing ALMA 12 CO (1-0) observations of three galaxies with resolved optical spectroscopy from the MaNGA survey. We present resolution-matched maps of the star formation rate and molecular gas mass. These data are used to calculate the star formation efficiency (SFE) and gas fraction ( f gas ) for these galaxies separately in the central "bulge" regions and outer disks. We find that, for the two galaxies whose global specific star formation rate (sSFR) deviates most from the star formation main sequence, the gas fraction in the bulges is significantly lower than that in their disks, supporting an "inside-out" model of galaxy quenching. For the two galaxies where SFE can be reliably determined in the central regions, the bulges and disks share similar SFEs. This suggests that a decline in f gas is the main driver of lowered sSFR in bulges compared to disks in green valley galaxies. Within the disks, there exist common correlations between the sSFR and SFE and between sSFR and f gas on kiloparsec scales-the local SFE or f gas in the disks declines with local sSFR. Our results support a picture in which the sSFR in bulges is primarily controlled by f gas , whereas both SFE and f gas play a role in lowering the sSFR in disks. A larger sample is required to confirm if the trend established in this work is representative of the green valley as a whole.

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Section: Manga Targetsmentioning

confidence: 99%

SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA

Lin

Belfiore

Pan

et al. 2017

ApJ

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“…We use the MILES stellar population models (Vazdekis et al 2010), which are based high resolution empirical stellar spectra of the MILES stellar library (Sánchez-Blázquez et al 2006), under the assumption of a Salpeter IMF. We also assume that the star formation history of the galaxies varies linearly in log-time space.…”

Section: Methodsmentioning

confidence: 99%

Initial Mass Function for Massive Galaxies at z ~ 1

Shetty¹,

Cappellari²

2014

Proc. IAU

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We present the results on the stellar Initial Mass Function (IMF) normalisation of 68 massive (M * = 10 11 − 10 12 M ⊙ ) Early-Type Galaxies (ETGs) at redshift of ∼1. This was achieved by deriving the stellar Mass-to-Light ratio (M/L) of the galaxies through axis-symmetric dynamical modelling and comparing it to the same derived via stellar population modelling through full spectrum fitting. The study also employs an Abundance Matching technique to account for the dark matter within the galaxies. The results demonstrate that massive ETGs at high redshifts on average have a Salpeter-like IMF normalisation, while providing observational evidence supporting previous predictions of low dark matter fraction in the inner regions (<1R e ) of galaxies at higher redshift.

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“…This is essential for the interpretation of galaxy spectra where calibration stars are not available, such as large galaxy redshift surveys or other high-redshift observations. Johansson et al (2010) produced new empirical fitting functions based on the MILES library (Sánchez-Blázquez et al 2006) that relate absorption line strength with stellar parameters, that are adopted in the models. These models can directly be applied to SDSS data with minimal correction for spectral resolution (Beifiori et al 2011).…”

Section: Recent Progressmentioning

confidence: 99%

Element abundance ratios in stellar population modelling

Thomas

2014

Proc. IAU

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Abstract. I review the implementation of the effects from varying chemical element abundance ratios in stellar population modelling, focusing on α-and Fe-peak elements. A brief overview of the development of such models over the past 30 years is provided, starting with early work on the identification of relevant absorption features in the spectra of early-type galaxies in the 1980s leading to the most recent developments of the past years. Recent highlights include the adoption of new flux calibrated libraries, the inclusion of a wide range of chemical elements, the calculation of error estimates on the model, and the consideration of element variation effects on full spectra. The calibration of such models with globular clusters and some key results on the element ratios measured in early-type galaxies are presented.

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Medium-resolution Isaac Newton Telescope library of empirical spectra

Cited by 1,444 publications

References 69 publications

SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA

SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA

Initial Mass Function for Massive Galaxies at z ~ 1

Element abundance ratios in stellar population modelling

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