Back to Volume
Paper: Investigating Inner Disk Lifetimes in Ophiuchus
Volume: 432, New Horizons in Astronomy: Frank N. Bash Symposium 2009
Page: 192
Authors: Deen, C. P.
Abstract: The Ophiuchus cloud is an ideal laboratory in which to study the process of star and planet formation, as it is one of the youngest (∼ 0.5–3 Myr) and closest (120 pc) regions actively forming stars. We present results of a magnitude limited near IR spectroscopic survey of the L1688 core. Using medium resolution (R2000) 0.8–2.4 μm spectra, we characterize the photospheres in our sample, in anticipation of studying how the properties of the disks around these objects evolve with age. Our study uses medium resolution near IR spectra to determine spectral types independent of reddening and veiling in a consistent way for class II and class III objects. By examining K-band spectra, we measure K-band veilings and accretion luminosities. We find a large overlap in the positions of the class II and class III objects in the HR Diagram. We also find that K-band veiling correlates with accretion luminosity, suggesting that UV photons from the accretion luminosity can increase the surface area of hot dust in the disk which emits at near IR wavelengths.
Back to Volume