PX437 EXOPLANETS

Peter Wheatley (PS009)p.j.wheatley@warwick.ac.uk

PX437 EXOPLANETS

PX437 EXOPLANETS

Outline

1. Before Exoplanets

2. Detecting exoplanets1. Direct imaging2. Reflex Motion of Star3. Transiting exoplanets

3. Planet Formation

4. Extra-Terrestial Life

PX437 EXOPLANETS

IAU

Terrestrial planets Gas giants

Ice giants

Asteroid belt Kuiper belt

PX437 EXOPLANETS

Ceres: dwarf planet

HST

Planets, dwarf planets, small solar-system bodies

Typical asteroid:small solar-system body

PX437 EXOPLANETSEvolutionary tracks

Burrows et al. 1997, ApJ 491, 856

Saturn

Jupiter

Planets

Browndwarfs

Stars

PX437 EXOPLANETS

Stevenson 1982 AREPS 10, 257

Composition of the giant planets

PX437 EXOPLANETS

Stephen Oxley

Tidal model

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

PX437 EXOPLANETS

PX437 EXOPLANETS

Imaging of the debris disc around beta Pictoris

Smith & Terrile 1984, Science 266, 1421

HST

PX437 EXOPLANETSProtoplanetary discs in Orion with HST

McCaughrean & O’Dell 1996 AJ 111, 1977

PX437 EXOPLANETS

PX437 EXOPLANETS

CaII

FeII

MgII

Debris discs around white dwarf stars

Gaensicke et al. 2006, Science 314, 1908

PX437 EXOPLANETS

Rin 0.7R

Rout 1.2R

e 0.02

Debris discs around white dwarf stars

PX437 EXOPLANETS

Rin 0.7R

Rout 1.2R

e 0.02

Debris discs around white dwarf stars

PX437 EXOPLANETS

Rin 0.7R

Rout 1.2R

e 0.02

Debris discs around white dwarf stars