A high-resolution stellar library for evolutionary population synthesis

Martins, Lucimara P.; Delgado, R. M. González; Leitherer, Claus; Cerviño, M.; Hauschildt, P. H.

doi:10.1111/j.1365-2966.2005.08703.x

Cited by 151 publications

(152 citation statements)

References 55 publications

(70 reference statements)

Supporting

Mentioning

148

Contrasting

Unclassified

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…We used the Martins et al (2005) library to add semiempirical spectra at the following locations: (i) T eff = 40 000 K, log g = 4 and 4.75, and [Fe/H] = −1, 0 and +0.3 dex, using as reference T eff = 20 000 K, log g = 3.5, [Fe/H] = 0; (ii) T eff = 55 000 K, log g = 3.5 and 4.75, and [Fe/H] = −1, and +0.3 dex, using as reference T eff = 30 000 K, log g = 3.5, [Fe/H] = 0; (iii) T eff = 20 000 K, log g = 3, and 5 and [Fe/H] = −1, using as reference T eff = 20 000 K, log g = 3.5, [Fe/H] = 0. We also used the Coelho et al (2005) library to add some low-metallicity cool dwarfs at the locations T eff = 3500 K, log g = 4.5 and 5.0, [Fe/H] = −1.5, -2.0 and −2.5 using as reference T eff = 3500 K, log g = 4.5, [Fe/H] = −0.5.…”

Section: Support For Extrapolationmentioning

confidence: 99%

The atmospheric parameters and spectral interpolator for the MILES stars

Prugniel

Vauglin

Koleva

2011

A&A

185

210

View full text Add to dashboard Cite

Context. Empirical libraries of stellar spectra are used to classify stars and synthetize stellar populations. MILES is a medium spectralresolution library in the optical domain covering a wide range of temperatures, surface gravities and metallicities. Aims. We redetermine the atmospheric parameters of these stars in order to improve the homogeneity and accuracy. We build an interpolating function that returns a spectrum as a function of the three atmospheric parameters, and finally we characterize the precision of the wavelength calibration and stability of the spectral resolution. Methods. We used the ULySS program with the ELODIE library as a reference and compared the results with those in the literature. Results. We obtain precisions of 60 K, 0.13, and 0.05 dex, respectively, for T eff , log g, and [Fe/H] for the FGK stars. For the M stars, the mean errors are 38 K, 0.26, and 0.12 dex and 3.5%, 0.17, and 0.13 dex for the OBA. We construct an interpolator that we test against the MILES stars themselves. We test it also by measuring the atmospheric parameters of the CFLIB stars with MILES as reference and find it to be more reliable than the ELODIE interpolator for the evolved hot stars, like those of the blue horizontal branch in particular.

show abstract

“…We used these semi-empirical spectra to constrain the extrapolations toward very hot and cool stars and toward the low metalicities for hot stars. The spectra from Coelho et al (2005) were used to extend the interpolator for the warm stars to low metallicity (down to [Fe/H] = -2.5 dex), and those from Martins et al (2005), to extend to high and low temperatures. Note that despite a more sophisticated model (Phoenix, Hauschildt et al 1996), these latter models do not match the observations for the cool stars, T eff < 3500 K, in the spectral region 6300 to 6500 Å.…”

Section: Elodie 32mentioning

confidence: 99%

Coudé-feed stellar spectral library – atmospheric parameters

Singh

Prugniel

et al. 2010

A&A

219

226

View full text Add to dashboard Cite

Context. Empirical libraries of stellar spectra play an important role in different fields. For example, they are used as reference for the automatic determination of atmospheric parameters, or for building synthetic stellar populations to study galaxies. The CFLIB (Coudé-feed library, Indo-US) database is at present one of the most complete libraries, in terms of its coverage of the atmospheric parameters space (T eff , log g and [Fe/H]) and wavelength coverage 3460-9464 Å at a resolution of ∼1 Å FWHM. Although the atmospheric parameters of most of the stars were determined from detailed analyses of high-resolution spectra, for nearly 300 of the 1273 stars of the library at least one of the three parameters is missing. For the others, the measurements, compiled from the literature, are inhomogeneous. Aims. In this paper, we re-determine the atmospheric parameters, directly using the CFLIB spectra, and compare them to the previous studies. Methods. We use the ULySS program to derive the atmospheric parameters, using the ELODIE library as a reference. Results. Based on comparisons with several previous studies we conclude that our determinations are unbiased. For the 958 F, G, and K type stars the precision on T eff , log g, and [Fe/H] is respectively 43 K, 0.13 dex and 0.05 dex. For the 53 M stars they are 82 K, 0.22 dex and 0.28 dex. And for the 260 OBA type stars the relative precision on T eff is 5.1%, and on log g, and [Fe/H] the precision is respectively 0.19 dex and 0.16 dex. These parameters will be used to re-calibrate the CFLIB fluxes and to produce synthetic spectra of stellar populations.

show abstract

A high-resolution stellar library for evolutionary population synthesis

Cited by 151 publications

References 55 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

The atmospheric parameters and spectral interpolator for the MILES stars

Coudé-feed stellar spectral library – atmospheric parameters

Contact Info

Product

Resources

About