3D spectral synthesis for Bernd
Freytag's CO5BOLD models of supergiant stars
Synthetic spectrum (LTE with scattering) for model
st35gm04n33 integrated over the upper XY face (Z=117).
Movie that shows model st35gm04n33 from one face going in
monochromatic light (in log scale) going through the spectrum.
The very first time series for model st35gm04n33 consisting
of three time steps.
The longest computed time series to date (different model).
Different presentation of spectral time series.
The A-star puzzle
Many previous attempts to reproduce line
asymmetry in A-stars failed: the hydrodynamical models would predict steeper
blue wing (like on the Sun) while the observations show the opposite. The new models
computed with CO5BOLD code in "box-in-star" framework and an accurate disk integration
using several rays qualitatively match the observations. The effects on different spectral
lines should be further investigated.
The at80g40n20 surface brightness in various wavelengths for one small segment of the stellar surface.
Points used in disk integration of the flux
Specific intensity profiles for various points on the stellar disk marked on
the figure above (upper group of curves). Disk integrated profile (green line)
compared to the Solar spectrum (black line). Note the opposite direction of
line asymmetry in A-star and in the Sun (bottom two curves).
Comparison with the observations using 1D static models (upper panel) and
3D dynamic models (bottom panel). 1D models do not come anywhere near the observations.
SME tar file
The official release of the SME is here. You can download it now following the link on the
left. We do not exclude some bugs and back-compatibility issues but together
we will prevail.
Here is the HARPSpol HD209100