photo_timescale

sbpy.activity.gas.photo_timescale(species, source=None)[source]

Photodissociation timescale for a gas species.

Parameters
speciesstring

Species to look up.

sourcestring, optional

Retrieve values from this source. See references for keys.

Returns
tauQuantity

The timescale at 1 au. May be a two-element array: (quiet Sun, active Sun).

References

[CS93] Table IV of Cochran & Schleicher 1993, Icarus 105, 235-253. Quoted for intermediate solar activity.

[C94] Crovisier 1994, JGR 99, 3777-3781.

[CE83] Crovisier & Encrenaz 1983, A&A 126, 170-182.

[H92] Huebner et al. 1992, Astroph. & Space Sci. 195, 1-294.

Examples

>>> from sbpy.activity import photo_timescale
>>> tau = photo_timescale('OH')