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

Ronaldo S. Levenhagen, Marcos P. Diaz, Paula R.T. Coelho, Ivan Hubeny

Research output: Research - peer-reviewArticle

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 ≤ ≤9.5. The stellar models are built for pure hydrogen and the spectra cover a wavelength range from 900 Å to 2.5 μm. 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 ∼8 Gyr.

LanguageEnglish (US)
Article number1
JournalAstrophysical Journal, Supplement Series
Volume231
Issue number1
DOIs
StatePublished - Jul 1 2017

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grids
synthesis
hydrogen
gravity
wavelength
modeling
energy
temperature
parameter
distribution
library
stellar models
local thermodynamic equilibrium
spectral energy distribution
gravitation
wavelengths

Keywords

  • globular clusters: general
  • line: profiles
  • stars: atmospheres
  • stars: fundamental parameters
  • techniques: spectroscopic
  • white dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

A Grid of Synthetic Spectra for Hot da White Dwarfs and Its Application in Stellar Population Synthesis. / Levenhagen, Ronaldo S.; Diaz, Marcos P.; Coelho, Paula R.T.; Hubeny, Ivan.

In: Astrophysical Journal, Supplement Series, Vol. 231, No. 1, 1, 01.07.2017.

Research output: Research - peer-reviewArticle

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