phase light curves for extrasolar jupiters and saturns u. dyudina(5/1), p.sackett(1), d. bayliss(1),...

Phase Light Curves for Extrasolar Jupiters and

Saturns

Phase Light Curves for Extrasolar Jupiters and

SaturnsU. Dyudina(5/1), P.Sackett(1), D. Bayliss(1), L Dones(2),

H. Throop (2), C. Porco(3), S. Seager(4)(1)Mount Stromlo Obs., Australian National University

(2)Southwest Research Institute, Boulder, USA(3)Space Science Institute, Boulder, USA

(4)DTM, Carnegie Institute at Washington, USA

(5)Caltech

U. Dyudina(5/1), P.Sackett(1), D. Bayliss(1), L Dones(2), H. Throop (2), C. Porco(3), S. Seager(4)(1)Mount Stromlo Obs., Australian National University

(2)Southwest Research Institute, Boulder, USA(3)Space Science Institute, Boulder, USA

(4)DTM, Carnegie Institute at Washington, USA

(5)Caltech

ApJ 618:973-986, Jan. 2005ApJ 618:973-986, Jan. 2005

Method.Method.•Model reflected light from extrasolar planets (as if they were Jupiter or Saturn)

•Rings? (yes!)•Inclination? (often yes)•Clouds? (sometimes)

•Model reflected light from extrasolar planets (as if they were Jupiter or Saturn)

•Rings? (yes!)•Inclination? (often yes)•Clouds? (sometimes)

Can we detect:Can we detect:

Dyudina, et al. ApJ 618:973-986 Jan. 2005Dyudina, et al. ApJ 618:973-986 Jan. 2005

Ful

l-di

sk a

lbed

o(L

p/L

*)X

(P

lane

t rad

ius)

²/(O

rbit

al d

ista

nce)

²F

or S

atur

n at

1 A

U :

1.6

X 1

0-7

Azimuth of the planet along the orbit (deg.)

Jupiter versus Saturn (orbit seen edge-on )Dyudina, et al. ApJ 618:973-986 Jan. 2005

Ful

l-di

sk a

lbed

o

(Lp/

L*)

X (

Pla

net r

adiu

s)²/

(Orb

ital d

ista

nce)

²


Modeled phase light curves (incl. 45 o)Modeled phase light curves (incl. 45 o)

Dyudina, et al.

ApJ 618:973-986 Jan, 2005

Light curves for various geometries with and without rings.

Inclination: i=0° (face on)

Eccentric orbits. No ringsDyudina, et al. ApJ 618:973-986 Jan. 2005Dyudina, et al. ApJ 618:973-986 Jan. 2005

Inclination: i=10°


Inclination: i=45°


Inclination: i~90° (edge on)


Argument of pericentre: ω=0°

To observer

Observer’s aziuthDyudina, et al. ApJ 618:973-986 Jan. 2005Dyudina, et al. ApJ 618:973-986 Jan. 2005

To observer

Argument of pericentre: ω=-90°


To observer

Argument of pericentre: ω=90°


Example - HD 108147b

• Extra solar planet discovered by Pepe, Mayor, et al (2002, A&A , 388, 632).

• Properties:

– Semi-major axis = 0.104 AU

– Period = 10.9 days

– Eccentricity = 0.498

– Inclination = ?


Light curve for HD 108147b with Jupiter’s surface


pericentre pericentre

Light curve for HD 108147b viewed at different azimuth

contrast

t-shift



– Argument of pericentre = -41°

Observable contrast for

ringless planets at different geometries


Light curve for HD 108147b viewed at different azimuth

contrast

t-shift



Observable t-shift

for ringless planets at different

geometries



Rings? (yes!)Inclination? (often yes on eccentric orbits)Clouds? (sometimes on eccentric orbits)

Rings? (yes!)Inclination? (often yes on eccentric orbits)Clouds? (sometimes on eccentric orbits)

With light curves can we detect:

With light curves can we detect:

::Use of our predictions for planning observations

Use of our predictions for planning observations

Planet’s luminosity for many geometriesEffects of Jupiter’s versus Saturn’s cloudsPlanet’s luminosity for many geometriesEffects of Jupiter’s versus Saturn’s clouds

phase light curves for extrasolar jupiters and saturns u. dyudina(5/1), p.sackett(1), d. bayliss(1),...

Documents

pericentre slide

rings dyudina

o slide

caltech apj

different geometries

jupiters surface dyudina

saturn rings

model reflected light