photo_lengthscale¶
- sbpy.activity.photo_lengthscale(species, source=None)[source]¶
Photodissociation lengthscale for a gas species.
- Parameters:
- speciesstring
The species to look up.
- sourcestring, optional
Retrieve values from this source (case insensitive). See references for keys.
- Returns:
- gamma
Quantity The lengthscale at 1 au.
- gamma
References
[CS93] H2O and OH from Table IV of Cochran & Schleicher 1993, Icarus 105, 235-253. Quoted for intermediate solar activity.
Examples
>>> from sbpy.activity import photo_lengthscale >>> gamma = photo_lengthscale('OH')