Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and...
-
Upload
lazare-cordier -
Category
Documents
-
view
104 -
download
0
Transcript of Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and...
![Page 1: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/1.jpg)
Bruno SicardyObs. Paris - LESIA
and occcultation Team
Bruno SicardyObs. Paris - LESIA
and occcultation Team
PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE DE CHARON DÉDUITES
D'OCCULTATIONS STELLAIRES 2002-2006
PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE DE CHARON DÉDUITES
D'OCCULTATIONS STELLAIRES 2002-2006
François ColasFrançois ColasThomas WidemannThomas Widemann
Atelier 3ème zone, Nantes 11-12 janvier 2007
Atelier 3ème zone, Nantes 11-12 janvier 2007
![Page 2: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/2.jpg)
special moment: equinox in 1988, perihelium in 1989 (period 248 years) effects on N2 pressure-equilibirum atmosphere?
Charon's size? ( density ?)
Charon's surface gravity ~ 1/2 Pluto's gravity possibility of atmosphere?
Pluto and Charonprobed by occultations
![Page 3: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/3.jpg)
C.J Hansen & D.A. Paige Icarus, 120, 247-265 (1996)
complex interplay of large distance variations & drastic seasonal effects
![Page 4: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/4.jpg)
2001
2020
2011
Pluto motion in the sky
![Page 5: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/5.jpg)
Pluton 20 juil. 2002
![Page 6: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/6.jpg)
P131.1 August 21, 2002
![Page 7: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/7.jpg)
![Page 8: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/8.jpg)
![Page 9: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/9.jpg)
![Page 10: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/10.jpg)
![Page 11: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/11.jpg)
![Page 12: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/12.jpg)
![Page 13: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/13.jpg)
spikes: scintillation in Pluto’s atmosphere
temperature contrast:warmer near pole cooler near equator
Sicardy et al. Nature, 10 July 2003
![Page 14: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/14.jpg)
Sicardy et al. Nature, July 2003
Imm. Eme.
![Page 15: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/15.jpg)
Sicardy et al. « Large changes in Pluto’s atmosphere
as revealed by recent stellar occultations »
Nature, 10 July 2003
![Page 16: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/16.jpg)
1988
2002
2006
pressure doubled!
?
![Page 17: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/17.jpg)
Time
rP
B'P
rN
1988
2002
2006
![Page 18: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/18.jpg)
C.J Hansen & D.A. Paige Icarus, 120, 247-265 (1996)
1900 2000 2100
10 bar
1 bar
0.1 bar
![Page 19: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/19.jpg)
Pluto in 1988
![Page 20: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/20.jpg)
Pluto in 2002
![Page 21: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/21.jpg)
measuring Charon
![Page 22: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/22.jpg)
0.89"
2UCAC 26257135(D. Herald, Aug. 2004)
![Page 23: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/23.jpg)
![Page 24: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/24.jpg)
QuickTime™ et undécompresseur Vidéo
sont requis pour visionner cette image.
VLT/NACO K band, Charon occultation 11 July 2005
1"
Pluto
star + Charon
![Page 25: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/25.jpg)
![Page 26: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/26.jpg)
![Page 27: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/27.jpg)
![Page 28: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/28.jpg)
Sicardy et al., Nature 439, 52, 2006« Charon’s size and an upper limiton its atmosphere from a stellaroccultation »
R= 603.61.4 km
![Page 29: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/29.jpg)
56 K - N2100 K - CH4
56 K
![Page 30: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/30.jpg)
Some conclusions:
Atmosphere: limit is model dependent, e.g.
CH4 with inversion layer: psurf < 15 nbar…or…N2 isothermal 56 K: psurf < 110 nbar etc…
Charon’s size: RC = 603.6 1.4 km
Charon’s density: C = 1.65 0.06 g cm-3
(taken from Buie et al. AJ. 132, 290, 2006, NB. P = 2.03 0.06 g cm-3 for Pluto)
Possibility to retrieve Pluto’s radius with accurate Charon’saccurate size --> refine atmospheric model
![Page 31: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/31.jpg)
recent & future stuff…
![Page 32: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/32.jpg)
12 June 2006 Pluto occultation
![Page 33: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/33.jpg)
1988 2002
![Page 34: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/34.jpg)
![Page 35: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/35.jpg)
![Page 36: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/36.jpg)
![Page 37: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/37.jpg)
![Page 38: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/38.jpg)
12 June 2006, Australia
Stockport
Blue Mountains
Hobart
![Page 39: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/39.jpg)
20 cm
40 cm
50 cm
Time (sec UT)
Stockport
Blue Mountains
Hobart
![Page 40: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/40.jpg)
pressure expansion factor since 2002
68.3% c.l.
99.7% c.l.
2
![Page 41: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/41.jpg)
1988 2002
![Page 42: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/42.jpg)
2006
![Page 43: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/43.jpg)
Hansen & Paige, Icarus 120, 247 (1996)
1988
20022006
pressure @ 1215 km(bar)
10
1
5
2
time (year)
New Horizon
![Page 44: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/44.jpg)
2007: four Pluto & co events?
![Page 45: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/45.jpg)
![Page 46: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/46.jpg)
Nix, 22 mars 2007
![Page 47: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/47.jpg)
2.1"
Hydra
![Page 48: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/48.jpg)
Pluto **et** Hydra12 mai 2007
Paranal & La Silla
Pluton14 juin 2007
Paranal, La Silla & SOAR
![Page 49: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/49.jpg)
en cours:
prédictions d'occultations par de gros TNO
Eris, 2005 FY9, 2003 EL6, Sedna, Orcus,Quaoar, Varuna, … (voir présentation T. Widemann)
![Page 50: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/50.jpg)
Paranal Jul 2005
… merci
![Page 51: Bruno Sicardy Obs. Paris - LESIA and occcultation Team Bruno Sicardy Obs. Paris - LESIA and occcultation Team PHYSIQUE DE L'ATMOSPHÈRE DE PLUTON ET TAILLE.](https://reader035.fdocuments.in/reader035/viewer/2022070309/551d9d84497959293b8bed5f/html5/thumbnails/51.jpg)