generation and similarity of the jovian satellite footprints · prangé et al. 1996 ingersoll et...

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Generation and Similarity of the Jovian Satellite Footprints Bertrand Bonfond (STAR Institute) J. Saur, D. Grodent, S. V. Badman, D. Bisikalo, V. Shematovich,J.-C. Gérard, and A. Radioti

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Page 1: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Generation and Similarity of the Jovian Satellite Footprints

Bertrand Bonfond (STAR Institute)

J. Saur, D. Grodent, S. V. Badman, D. Bisikalo,

V. Shematovich,J.-C. Gérard, and A. Radioti

Page 2: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

First direct observations of the Io footprint

Connerney et al. 1993

Prangé et al. 1996

Ingersoll et al. 1998

Page 3: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

A long chain of events

Bonfond et al. 2013

Page 4: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

A complex morphology

Page 5: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Relative motion of the spots

Bonfo

nd e

t al.

2009

Page 6: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Relative motion of the spots

Bonfo

nd e

t al.

2013

Bonfo

nd e

t al.

2017a

GFP South GFP North

Page 7: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Relative motion of the spots

Page 8: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Brightness variations: System III

Bonfond et al. 2013

Grodent et al. 2009

Wannawichian et al. 2010

Io

Europa

Ganymede

Page 9: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Brightness variations: Injections

Bonfond et al. 2017

Page 10: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Brightness variations: minutes

Bonfond et al. 2013

Page 11: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Brightness variations: minutes

Grodent et al. 2009Bonfond et al. 2017

Page 12: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Footprint tails: theories

Neubauer, 1980Ergun et al., 2009

Page 13: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Footprint tails: observations

Bonfond et al. 2017b

Page 14: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Confirmation of the Grodent anomaly

Page 15: Generation and Similarity of the Jovian Satellite Footprints · Prangé et al. 1996 Ingersoll et al. 1998. A long chain of events Bonfond et al. 2013. A complex morphology. ... Ctdl_:

Conclusions

• The footprints of Io, Europa and Ganymede are all made of several spots and a tail.

• The footprints of Io, Europa and Ganymede display the same kind of brightness variations.

• The IFP tail appears to be created by the same process as the main spot.