High Time Resolution Astrophysics-London 12/04/2013 Exploration
of the Outer Solar System : Serendipitous Occultations Franoise
Roques (Observatoire de Paris)
Slide 2
High Time Resolution Astrophysics-London 12/04/2013 Beyond
Neptune 200 meters TNO at 40AU A 10 km comet at 5000 AU
Slide 3
High Time Resolution Astrophysics-London 12/04/2013 Beyond
Neptune : an invisible world KUIPER BELTOORT CLOUD
Slide 4
High Time Resolution Astrophysics-London 12/04/2013
Slide 5
Schlichting et al., 2009 Liu et al. in preparation Structure of
the Kuiper Belt
Slide 6
High Time Resolution Astrophysics-London 12/04/2013 Schlichting
et al., in preparationLiu et al. in preparation Structure of the
Kuiper Belt
Slide 7
High Time Resolution Astrophysics-London 12/04/2013 Kuiper Belt
occultation rate
Slide 8
High Time Resolution Astrophysics-London 12/04/2013 Oort Cloud
exploration : Choice of target stars Target stars must be bright
and very small : only 100 stars.deg -2
Slide 9
High Time Resolution Astrophysics-London 12/04/2013 Fast Multi
Object Photometer F-MOP multi-fiber instrument + large telescope +
fast camera Fast simultaneous accurate (multi-color) photometry on
several targets in a large field. stellar occultations, but also
YSO, sdB stars, exoplanets transits (Kepler field), cataclismic
variables
Slide 10
High Time Resolution Astrophysics-London 12/04/2013 see poster
session 29 image fibres 10 Hz MEFOS, a 29 fibers spectrograph has
been upgraded and and mounted on the 1.93m telescope of the
OHP
Slide 11
High Time Resolution Astrophysics-London 12/04/2013 dt = 0.05
second A flash star?
Slide 12
High Time Resolution Astrophysics-London 12/04/2013 UltrPhot, a
high speed photometric mode on VLT2 field : 25 diameter 60-80
fibres fast camera (100 Hz) A Fast Multi-Object Photometer :
UltraPhot
Slide 13
High Time Resolution Astrophysics-London 12/04/2013 Fast Multi
Object Photometer F-MOP Fast simultaneous accurate (multi-color)
photometry on several targets in a large field. stellar
occultations, but also YSO, sdB stars, exoplanets transits (Kepler
field), cataclismic variables Search collaborations for promotion
of F-MOP
Slide 14
High Time Resolution Astrophysics-London 12/04/2013 Thank
you,
Slide 15
High Time Resolution Astrophysics-London 12/04/2013 Franoise
Roques, Bruno Sicardy, Thomas Widemann Alain Doressoundiram,
Frederic Dauny, Paul Felenbok, Andre Fernandez, Bernard Christophe,
Jean Guerin, Stephen Shih, Joe Liu, Lucie Maquet (Lesia,
Observatoire de Paris) Hsiang-Kuang Chang (Institute of Astronomy
National Tsing Hua University, Taiwan) Franois Colas, Jean
Lecacheux (Institut de Mcanique Cleste et de Calcul des Ephmrides,
Observatoire de Paris) Beyond Neptune
Slide 16
High Time Resolution Astrophysics-London 12/04/2013 UltraCam
data UltraPhot - aperture size maximum diameter = 4.3
Slide 17
High Time Resolution Astrophysics-London 12/04/2013 UltraPhot -
CCD
Slide 18
High Time Resolution Astrophysics-London 12/04/2013 UltraPhot -
camera
Slide 19
High Time Resolution Astrophysics-London 12/04/2013 Two
approachs Size ? Shape ? Atmosphere ? Satellites ? size
distribution? disk mass ? spatiale distribution ?
High Time Resolution Astrophysics-London 12/04/2013
Ground-based data : Doressoundiram et al., in preparation Miosotys
3780 hours Images dt = 0.5 sec 1-10 events : 0,3 1 km Data under
analysis see Poster
Slide 22
High Time Resolution Astrophysics-London 12/04/2013 Spatial
data : Liu et al., in preparation Corot data 144000 hours Images dt
= 1sec 13 events : 0,5 1,5 km see Poster
Slide 23
High Time Resolution Astrophysics-London 12/04/2013 Spatial
data : RXTE/VGA data Chang et al. 2011 70 hours Flux dt = 0.001 sec
1 event : 0,1km