photo_lengthscale

sbpy.activity.gas.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
gammaQuantity

The lengthscale at 1 au.

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')