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Published byMadlyn Richard Modified over 9 years ago
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Anne-Marie Lagrange 1 et al 1 Laboratoire d’Astrophysique de Grenoble, France IAU276 – October, 11, 2010 The candidate companion around Pictoris
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HR8799 bcd (~7-10MJup; 24,38,64AU) Marois et al. (2008) Formation process ?? Fomalhautb (<3MJup; 115AU) Kalas et al. (2008) 2M1207B (~5-8MJup; 50AU) Chauvin et al. (2004;2005) ABPic b (~13MJup; 250AU) Chauvin et al. (2005a)
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Planet candidate around beta Pictoris Lagrange et al (2009a, 2009b) 400mas N E Planet candidate. ΔL’ = 7.7 ± 0.3 => M~9MJup if bound. Sep = 411 ± 8 mas (~8 AU) proj. P.A. = 31.8 ± 1.3 deg (disk P.A. ~ 33 deg) Teff ~1500K Age ~12 Myr VLT/NaCo 2003
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February 2009 Lagrange et al (2009); see also Fitzgerald and Kalas (2009) 6 limit ( L_abs=9.8) After quad. Before quad.
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Planet around beta Pictoris Lagrange et al (2010) N E 400mas 300mas VLT/NaCo 2003 VLT/NaCo Fall 2009
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Semi-major axis: ~8-14 AU
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Augereau et al. (2001b) Planet on an inclined orbit, 10 AU ~ 80 UA Augereau et al. (2001b) Mouillet et al. (1997)
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Constraints from the warp modeling
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90’s: Falling Evaporating Bodies on Pictoris => indirect evidence for planet ? Vidal-Madjar, Lagrange, Beust, Morbidelli…
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A massive Giant Planet at ~10AU explains: The inner warp and other disk asymetries The FEBs Implications on planet formation scenari : Giant Planets form rapidly (< a few Myr) Formation process: could be core accretion (see Keenedy & Kenyon 08) Test of evolutionary model: unique test given its short period
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NB4.05 micDusty model Quanz et al (2010)
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Ks s13Ks s27 Bonnefoy et al (2010)
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a=8AU => maximum mass~30 Mjup a=14AU => maximum mass~10Mjup
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Future of exo-planets imaging
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