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[O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars | M.E. van den Ancker
; B. Acke
; C.P. Dullemond
; | Date: |
11 Aug 2004 | Subject: | astro-ph | Affiliation: | ESO), B. Acke (KU Leuven) and C.P. Dullemond (MPA | Abstract: | We present high spectral-resolution optical spectra of 49 Herbig Ae/Be stars in a search for the [O I] 6300.2 A line. The vast majority of the stars in our sample show narrow (FWHM < 100 km/s) emission lines, centered on the stellar radial velocity. Some stars in our sample show double-peaked lines profiles, with peak-to-peak separations of about 10 km/s. The presence and strength of the [O I] line emission appears to be well correlated with the far-infrared energy distribution of each source: stars with a strong excess at 60 micron have in general stronger [O I] emission than stars with weaker 60 micron excesses. We interpret the observed [O I] 6300.2 A line profiles as arising in the surface layers of the protoplanetary disks surrounding Herbig Ae/Be stars. | Source: | arXiv, astro-ph/0408199 | Services: | Forum | Review | PDF | Favorites |
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