NOAO >   Observing Info >   Approved Programs >   2002A-0008

Small NOAO Logo

Proposal Information for 2002A-0008


PI: Mario E. van den Ancker, Harvard-Smithsonian Center for Astrophysics, mvandenancker@cfa.harvard.edu
Address: 60 Garden Street, MS 42, Cambridge, MA 02138

Title: High resolution spectroscopy of protoplanetary disks in Herbig Ae/Be systems

Abstract: The evolution of material in disks surrounding pre-main sequence stars is one of the most important, yet poorly understood, processes relating to the question of the origin of planetary systems. Several tracers of circumstellar material have been used to study protoplanetary disks in Herbig Ae/Be stars (HAeBes), with varying degrees of success. However, optical spectroscopy in forbidden emission lines, as is used commonly in studies of T Tauri stars, has so far hardly been used. In a pilot study we have obtained [O I] 6300.2 spectra of a few HAeBes which can be well reproduced by simple disk models. In order to verify this simple interpretation and to investigate the correlation between line profiles of forbidden emission lines and other tracers of circumstellar material in HAeBes, such as infrared solid-state bands and submm fluxes, we hereby re-propose (this program was originally allocated observing time in 2001, but all awarded nights were completely clouded) to use the echelle spectrograph on the KPNO 4 m telescope to obtain high spectral resolution, high S/N [O I] 6300.2 spectroscopy of a sample of northern Herbig Ae/Be stars. A similar proposal has been awarded time by ESO to observe the southern sources in our list.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2002A-0008

noaoprop-help@noao.edu

Small NOAO Logo