white dwarfs, planets, disks marc kuchner nasa goddard space flight center
DESCRIPTION
White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center Laboratory for Exoplanets and Stellar Astrophysics. Laboratory for Exoplanets and Stellar Astrophysics NASA Postdoctoral Program: http://nasa.orau.org/postdoc/ Exoplanet Talks: http://eud.gsfc.nasa.gov/ - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/1.jpg)
White Dwarfs, Planets, Disks
Marc Kuchner
NASA Goddard Space Flight Center
Laboratory for Exoplanetsand Stellar Astrophysics
![Page 2: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/2.jpg)
Laboratory for Exoplanetsand Stellar Astrophysics
NASA Postdoctoral Program:http://nasa.orau.org/postdoc/
Exoplanet Talks: http://eud.gsfc.nasa.gov/ Marc.Kuchner/exoplanetclub.html
![Page 3: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/3.jpg)
Spitzer Space Telescope
White DwarfBill Reach (IPAC)Ted von Hippel, Don Winget,Mukremin Kilic, Fergal Mullaly(UT Austin)Adam Burrows (U. Arizona)
![Page 4: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/4.jpg)
Wavelength (microns)
White DwarfG29-38
Zuckerman &Becklin 1987
1200 K0.15 Rsun
~40 Jupitermassesby age and T
![Page 5: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/5.jpg)
H
He
CMgFe
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
x=0.75QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
log mass (solar masses)
Rad
ius
(Ear
th R
adii)
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
White Dwarf
![Page 6: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/6.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
log mass (solar masses)
Rad
ius
(Ear
th R
adii)
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.HD209458b
G29-38b ?
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.Jupiter
![Page 7: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/7.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.DO
DZ
75% 10% 5% 10%
Helium Surface
Hydrogen Surface
No Lines fromSurface!
DQ
DX
Metal, Carbon,Or Unidentified
Carbon andOxygen Core
DA DCDB
![Page 8: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/8.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
~20% of DAs, including G29-38
Hydrogen Surface with Metals
DAZ
CO core
![Page 9: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/9.jpg)
Teff (K)
Bergeron et al. 2004
DA InstabilityStrip
Lo
g g
![Page 10: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/10.jpg)
615s
P
ower
23 JUL 1988B-band
24 JUL 1988K-band
Patterson et al. 1991
![Page 11: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/11.jpg)
![Page 12: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/12.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Pulsation Timing
(Kleinman et al. 1998) & speckle photometry (Kuchner et al. 1998)
HST/Gemini Photometry
(Debes et al. 2005)
Debes et al. 2005
Log R (AU)
MJu
pite
r
Deuterium Burning Limit
![Page 13: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/13.jpg)
![Page 14: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/14.jpg)
![Page 15: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/15.jpg)
![Page 16: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/16.jpg)
e.g. Debes & Sigurdsson 2002, Jura et al. 2003
![Page 17: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/17.jpg)
![Page 18: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/18.jpg)
Spitzer Space Telescope
White Dwarf
![Page 19: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/19.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Jupiter at 5 microns w/ ISO (Encrenaz et al. 1997)
![Page 20: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/20.jpg)
Typical WD ages since formation ofprogenitor are 1.5 - 3.5 109 years.
Planet mass (MJupiter)0 5 10 15
0.3
0.2
0.1
0.0Pla
net/W
D a
t 4.5
mic
rons
109 yr.
3 109 yr.
Spitzer photometry
![Page 21: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/21.jpg)
![Page 22: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/22.jpg)
CIA
Bergeron et al. 1994
![Page 23: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/23.jpg)
Kilic et al. 2006, ApJ, in press
Same Modelsw/ CIA
New Spitzer Photometry
Without the mid IR data:5400 K, 3.5 Gyr old.With the mid IR data:5200 K, 4.5 Gyr old
![Page 24: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/24.jpg)
FJ/FV
F 8m
/FV
DZAll Hydrogen WDs below ~7000 Kshow an 8 micron deficit!
![Page 25: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/25.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Galactic Disk:8 +/- 1.5 Gyr
![Page 26: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/26.jpg)
Von Hippel et al., in prep
A New Dusty WD!
![Page 27: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/27.jpg)
Kilic et al. 2005Becklin et al. 2005
Becklin & Zuckerman 1987
Kilic et al., in prepGD 56
Plus 2 more from IRTF and one from Farihi et al makes 5!
![Page 28: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/28.jpg)
![Page 29: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/29.jpg)
![Page 30: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/30.jpg)
![Page 31: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/31.jpg)
Amorphous carbon needed tomatch 1.6 m spectrum
amorphousolivine
forsterite
Reach et al. 2005
C:O ratio 3:11-10RSun
0.01-1000 m grains dn/da a-3.5
![Page 32: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/32.jpg)
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Livio, Pringle & Saffer 1992
![Page 33: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/33.jpg)
H
He
CMgFe
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
x=0.75QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
log mass (solar masses)
Rad
ius
(Ear
th R
adii)
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
White Dwarf
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.CO Giant
![Page 34: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/34.jpg)
C:O ratio in gas 9:1 Roberge et al. in press
![Page 35: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/35.jpg)
11.3 micron C-Hout-of-plane bend
T Tauri Stars -- Spitzer
Geers et al 2005
![Page 36: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/36.jpg)
![Page 37: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/37.jpg)
![Page 38: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/38.jpg)
![Page 39: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/39.jpg)
Particle Plieups Youdin & Chiang 2004
![Page 40: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/40.jpg)
Lodders& Fegley 1997
![Page 41: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/41.jpg)
Wood &Hashimoto1993
Atomic Fraction
SiC
Forsterite
Cohenite
EnstatiteFe
EnstatiteChondrites?
Gas and Graphite
![Page 42: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/42.jpg)
![Page 43: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/43.jpg)
Gaidos 2000Kuchner & Seager 2005
![Page 44: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/44.jpg)
Artist: Lynette Cook
![Page 45: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/45.jpg)
Solar Composition
Kuchner & Seager 2005
![Page 46: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/46.jpg)
Carbon Planet
Kuchner & Seager 2005
![Page 47: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/47.jpg)
Kuchner & Seager 2005
![Page 48: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/48.jpg)
Kuchner & Seager 2005
![Page 49: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/49.jpg)
Tim
e of
Arr
ival
Res
idua
ls (
s)QuickTime™ and a
TIFF (Uncompressed) decompressorare needed to see this picture.
w/o planets
withnon-interactingplanets
with realplanets
Konacki & Wolzsczan 03
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
![Page 50: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/50.jpg)
Cool Hydrogen WDs have mid-IR deficits; the inferred age of theGalactic disk is wrong by ~25%.
Roughly 1/4 DAZ WDs are dusty.
The dust sometimes has silicates----but it may be C rich (e.g. G29-38).
Carbon planets may be common; we can recognize them if they are hot.
Key Points
New Exoplanet Lab at Goddard: come join us as a postdoc or asa speaker!
![Page 51: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/51.jpg)
![Page 52: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/52.jpg)
Wavelength (microns)
Flux
(mJy
)
A WD Planet With A Dust Disk
Reach, Von Hippel& Kuchner et al. 2005
![Page 53: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/53.jpg)
![Page 54: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/54.jpg)
Plus one more from Farihi et al. (private comminucation).
That makes 5 dusty DAZs out of 20 DAZs with 8 micronPhotometery.
DAZd ?
![Page 55: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/55.jpg)
New Dusty WDs from IRTF:GD56+GD362(Kilic et al 2006)
GD362 also found byBecklin et al. 2006
![Page 56: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/56.jpg)
![Page 57: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/57.jpg)
The SunGalactic Center
Carigi et al. 2005
![Page 58: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/58.jpg)
Dead Star:White DwarfG 29-38
Solar SystemDust
6 8 10 12 14Wavelength (microns)
Rel
ativ
e br
ight
ness
![Page 59: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/59.jpg)
Spitzer Sees Ghostof Solar System’sFuture
Marc KuchnerGoddard Space Flight Center
Bill ReachSpitzer Science Center
Ted von HippelUniversity of Texas, Austin
![Page 60: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/60.jpg)
Oppenheimer et al. 2001
![Page 61: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/61.jpg)
![Page 62: White Dwarfs, Planets, Disks Marc Kuchner NASA Goddard Space Flight Center](https://reader036.vdocuments.us/reader036/viewer/2022062502/5681364b550346895d9dca34/html5/thumbnails/62.jpg)
Bergeron & Leggett 2002
UltraCool WDs (<4000 K)