A Grid of Synthetic Spectra for Hot DA White Dwarfs and Its Application in Stellar Population Synthesis

A Grid of Synthetic Spectra for Hot DA White Dwarfs and Its Application in Stellar Population Synthesis

Author Levenhagen, Ronaldo S. Autor UNIFESP Google Scholar
Diaz, Marcos P. Google Scholar
Coelho, Paula R. T. Google Scholar
Hubeny, Ivan Google Scholar
Abstract In this work we present a grid of LTE and non-LTE synthetic spectra of hot DA white dwarfs (WDs). In addition to its usefulness for the determination of fundamental stellar parameters of isolated WDs and in binaries, this grid will be of interest for the construction of theoretical libraries for stellar studies from integrated light. The spectral grid covers both a wide temperature and gravity range, with 17,000 K <= T-eff <= 100,000 K and 7.0 <= log g <= 9.5. The stellar models are built for pure hydrogen and the spectra cover a wavelength range from 900 angstrom to 2.5 mu m. Additionally, we derive synthetic HST/ACS, HST/WFC3, Bessel UBVRI, and SDSS magnitudes. The grid was also used to model integrated spectral energy distributions of simple stellar populations and our modeling suggests that DAs might be detectable in ultraviolet bands for populations older than similar to 8 Gyr.
Keywords globular clusters: general
line: profiles
stars: atmospheres
stars: fundamental parameters
techniques: spectroscopic
white dwarfs
xmlui.dri2xhtml.METS-1.0.item-coverage Bristol
Language English
Sponsor CNPq
Grant number CNPq: 305657
Date 2017
Published in Astrophysical Journal Supplement Series. Bristol, v. 231, n. 1, p. -, 2017.
ISSN 0067-0049 (Sherpa/Romeo, impact factor)
Publisher Iop Publishing Ltd
Extent -
Origin http://dx.doi.org/10.3847/1538-4365/aa7681
Access rights ACESSO RESTRITO
Type Article
Web of Science ID WOS:000404605600001
URI https://repositorio.unifesp.br/handle/11600/53602

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