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Infrared Aurorae in the Solar System

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Presentation on theme: "Infrared Aurorae in the Solar System"— Presentation transcript:

1 Infrared Aurorae in the Solar System
ATMOSPHERIC PHYSICS LABORATORY DEPARTMENT OF PHYSICS AND ASTROMONY Infrared Aurorae in the Solar System Tom Stallard Steve Miller, Henrik Melin, Makenzie Lystrup and the Cassini community, especially: Emma Bunce, Chris Arridge, Nick Achilleos and Michele Dougherty

2 Hydrocarbons H3+ formation H2 + hn = H2+ + e H2 + e* = H2+ + e + e
H H2 = H H H3+ destruction H3+ + X = HX+ + H2 H3+ + e- = H + H2 Hydrocarbons

3 Imaging: Jupiter Ultraviolet (Clarke et al) Infrared (Connerney et al)

4 Saturn

5 Uranus

6 Spectroscopy: Jupiter

7 Multiple line spectroscopy provides:
emission intensities temperature composition cooling rates vertical thermal profile atmospheric densities

8 IR observations of Jupiter

9 Temperature

10 Cooling

11 Ion Winds

12

13

14 High resolution observations of Saturn

15

16 Compared with the UV emission

17 1.3” smear

18 Infilled Extended Flanks

19

20 Saturn Jupiter

21 Co-rotation breakdown
Saturn Co-rotation breakdown Jupiter

22 Co-rotation breakdown
Saturn Co-rotation breakdown Outer effects Jupiter

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