Evolution of Gas in Circumstellar Disks

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Presentation transcript:

Evolution of Gas in Circumstellar Disks Infrared Spectroscopy of Gas Species Kristna Barkume Ay/Ge 132

From Molecular Clouds to Planet-Forming Disks A Spitzer Legacy Program Spitzer Instruments IRAC: Imager 4 colors between 3.6-8 mm Images of the CO content IRS: 5-40 mm spectrometer R~600 H2, H20, CO2, solid state silicates MIPS: 23.5-155 mm multi-band photometer Other Instruments NIRSPEC (Keck II) : 1-5.5 mm R~25,0000 CO (u = 1-0) OVRO

Boogert, Hogerheijde, and Blake 2002 4.7 mm CO from L1489 IRS Boogert, Hogerheijde, and Blake 2002 Key: + 13CO u C18O

Boogert, Hogerheijde, and Blake 2002 4.7 mm CO from L1489 IRS Boogert, Hogerheijde, and Blake 2002

AB Aurigae Herbig AeBe Star ~2-4 Myr Strong Pfb emission Brittain, et al. 2003 AB Aurigae Herbig AeBe Star ~2-4 Myr Strong Pfb emission IR Fluorescence

HD 141569 Herbig AeBe Star 5 Myr or greater No Pfb emission UV Pumped Brittain, et al. 2003 HD 141569 Herbig AeBe Star 5 Myr or greater No Pfb emission UV Pumped