Extend wavelength range for kinematics runs

[Giovanni]

Hi,

I would like to use the kinematics in SUNRISE in the range 3700-7600 A to mimic a particular survey, but if I select this range of wavelengths I get:

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Wavelength scale is not logarithmic, kinematics require that!

terminate called after throwing an instance of 'int'

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If I reduce to max_wavelength =7000 A it works perfectly, I check the high-res stellar model and it seems that after 7000 A it has a much coarser resolution.

If I generate a stellar model with higher resolution also between 7000-7600 SUNRISE should work?

How the wavelengths should be spaced?

Thanks a lot!

Giovanni

[Chris Hayward]

Hi Giovanni,

In principle there is no problem with running over 3700-7600 A if you create a high-res stellar model that extends to 7600 A. You just have to make sure that you have uniform logarithmic spacing across that wavelength range. Ideally, this should be as coarse as you can tolerate because you may run into memory issues (the memory used primarily depends on the size of your cameras, number of cameras, and number of wavelengths).

I should warn you that the kinematics functionality has not been tested extensively, and we've observed some strange behavior (unphysically broad emission lines with strange profiles; it seems to be associated only with the young star particles). I looked into this a bit but haven't yet sorted it out. So, it's up to you to ensure that the code is behaving as it should and that your results are reasonable.

Cheers,

Chris

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Chris Hayward

Moore Postdoctoral Scholar in Theoretical Astrophysics

California Institute of Technology
Office: Cahill 326

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