Theoretical Stellar Input Spectra

To model the emission of the central star ProDiMo includes theoretical stellar photosphere grids from PHOENIX and Kurucz.

The stellar spectra are at Solar metallicity.

PHOENIX

The standard PHOENIX spectra are from Brott+ (2005). Additionally also the so called Drift-Phoenix spectra for low mass stars (brown dwarfs) are included.

Drift-Phoenix models

They are from http://svo2.cab.inta-csic.es/svo/theory/newov/index.php, and have been converted from erg/cm2/s/A to erg/cm2/s/Hz/sr. Included models are:

  • Teff 1000 - 3000 K,
  • logg 3 - 6
  • metallicity: 0

The model with Teff = 2500 K and logg = 3.0 is missing.

To use them turn on the option

.true.    ! use_drift_phoenix

and ProDiMo will prefer to use those models where possible. For M6 to L6 spectral types they might give you more accurate stellar spectra.

References

  • Baron et al. 2003, IAU 210, 19 Highlights of Stellar Modeling with PHOENIX
  • Hauschildt & Baron 1999, JCoAM 109, 41 Numerical solution of the expanding stellar atmosphere problem
  • Helling C., Woitke P., 2006, A&A, 455, 325 Dust in brown dwarfs. V. Growth and evaporation of dirty dust grains
  • Helling et al. 2008, A&A, 485, 547 Dust in brown dwarfs and extra-solar planets. I. Chemical composition and spectral appearance of quasi-static cloud layers
  • Helling et al. 2008, ApJL, 675, L105 Consistent Simulations of Substellar Atmospheres and Nonequilibrium Dust Cloud Formation
  • Witte et al. 2009, A&A, 506, 1367 Dust in brown dwarfs and extra-solar planets. II. Cloud formation for cosmologically evolving abundances
  • Witte et al. 2011, A&A, 529, A44 Dust in brown dwarfs and extra-solar planets. III. Testing synthetic spectra on observations
  • Woitke P., Helling C., 2003, A&A, 399, 297 Dust in brown dwarfs. II. The coupled problem of dust formation and sedimentation
  • Woitke P., Helling C., 2004, A&A, 414, 335 Dust in brown dwarfs. III. Formation and structure of quasi-static cloud layers

Kurucz

https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/kurucz-1993-models