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ALMA User Perspective: Galactic Studies

ALMA User Perspective: Galactic Studies. Some Topics in the Origins of Solar Systems. David J. Wilner. Harvard-Smithsonian Center for Astrophysics. Schematic Origins of Solar Systems. sequence of mass evolution: from dense core to star + debris

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ALMA User Perspective: Galactic Studies

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  1. ALMA User Perspective: Galactic Studies Some Topics in the Origins of Solar Systems • David J. Wilner • Harvard-Smithsonian Center for Astrophysics

  2. Schematic Origins of Solar Systems sequence of mass evolution: from dense core to star + debris ALMA images dust and gas at key long wavelengths ~ 0.3 to 9 mm 105 yr 107 yr 108 yr pre-main-sequence star and protoplanetarydisk star, planetary system, debris protostar core formation and initial conditions 100 AU Marois et al. 2010 McCaughren & O’Dell 1996 J. Jørgensen Alves et al. 2001

  3. ALMA: Large, Best Site, Best Receivers… muchdeeper individual spectro-imaging studies and statistical views, SMA ALMA ALMA Early Science CARMA IRAM PdBI inspired by E. Rosolowsky

  4. Debris Disk Structure >15% of nearby stars from infrared excess 2nd generation dust, collisions >km bodies e.g. βPic, A6V, 19 pc small dust ≠ large dust star ALMA ALMA Early Science disk Nilsson et al. 2009 ALMA Wilner et al. 2011 Chris Stark dusty KB model

  5. Terrestrial Planet Zone Debris HD 69830: K0V, 12.5 pc mid-IR: dust at ~1 AU, terrestrial planet zone outside 3 Neptune mass radial velocity planets about 0.3 mJy at 450 mm ALMA Lovis et al. 2006 inclination  planet masses non-axisymmetric structure? synoptic studies? 0.2 arcsec = 2.5 AU Mark Wyatt Beichman et al. 2005, Lisse et al. 2007

  6. Protoplanetary Disk Dust 1-10 Myr, gas and trace dust structure, holes, gaps, planets! 100’s at 150 pc, 1000’s <1 kpc RY Tau DG Tau 870 mm Isella et al. 2010 100 AU CARMA 1.3 mm at the limits of ALMA Wolf & D’Angelo 2005 Williams et al. 2005 5 AU SMA 870 μm Sean Andrews

  7. Protoplanetary Disk Gas kinematics, accretion, chemistry,dispersal HD 163296 CO J= 3-2 @44 m/s Hughes et al. 2011 Aikawa 2006 Oberg et al. 2010

  8. Protostars: Infall, Disk, Outflow • nature of collapse? • redshifted absorption DiFrancesco et al. 2001 • role of B field? • dust polarization Girart et al. 2006 Keene & Masson 1990 • disk formation, • evolution, stability? • spatial filtering Menv, Mdisk F. Gueth • outflow origins? • collimation, rotation Spitzer 3.6, 4.5, 8.0 μm and SCUBA 850 μm Jørgensenet al. 2009

  9. Concluding Remarks ALMA offers unprecedented sensitivity at millimeter wavelengths (already at start of Early Science) many fundamental issues to address, e.g. from dense coresto debris reach Solar System scales for 100’s to 1000’s of sources expect a lot of surprises ALMA

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