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Peter Wheatley (PS009) PX437 EXOPLANETS.

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Presentation on theme: "Peter Wheatley (PS009) PX437 EXOPLANETS."— Presentation transcript:

1 Peter Wheatley (PS009) PX437 EXOPLANETS

2 Outline 1.Before Exoplanets 2.Detecting exoplanets 1.Direct imaging 2.Reflex Motion of Star 3.Transiting exoplanets 3.Planet Formation 4.Extra-Terrestial Life

3 PX437 EXOPLANETS IAU Terrestrial planets Gas giantsIce giants Asteroid beltKuiper belt

4 PX437 EXOPLANETS Ceres: dwarf planet HST Planets, dwarf planets, small solar-system bodies Typical asteroid: small solar-system body

5 PX437 EXOPLANETS Evolutionary tracks Burrows et al. 1997, ApJ 491, 856 Saturn Jupiter Planets Brown dwarfs Stars

6 PX437 EXOPLANETS Stevenson 1982 AREPS 10, 257 Composition of the giant planets

7 PX437 EXOPLANETS Stephen Oxley Tidal model

8 PX437 EXOPLANETS Discovery of debris around Vega Aumann et al. 1984, ApJL 278, 23 IRAS observation: Temperature ~ 85 K Extent ~ 20 arcsec ~ 85 AU Observed IR spectrum with 10,000 K black body subtracted

9 PX437 EXOPLANETS

10 Imaging of the debris disc around beta Pictoris Smith & Terrile 1984, Science 266, 1421 HST

11 PX437 EXOPLANETS Protoplanetary discs in Orion with HST McCaughrean & O’Dell 1996 AJ 111, 1977

12 PX437 EXOPLANETS

13 CaII FeII MgII Debris discs around white dwarf stars Gaensicke et al. 2006, Science 314, 1908

14 PX437 EXOPLANETS R in  0.7R  R out  1.2R  e  0.02 Debris discs around white dwarf stars

15 PX437 EXOPLANETS R in  0.7R  R out  1.2R  e  0.02 Debris discs around white dwarf stars

16 PX437 EXOPLANETS R in  0.7R  R out  1.2R  e  0.02 Debris discs around white dwarf stars


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