photo_timescale¶
- sbpy.activity.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:
- tau
Quantity The timescale at 1 au. May be a two-element array: (quiet Sun, active Sun).
- tau
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')