[O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars

Details [O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars [O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars

2004-08-11

arxiv.org/abs/astro-ph/0408199v1

Astronomy and Astrophysics

Astrophysics

6 pages, 7 figures; to appear in on-line proceedings Second TPF/Darwin International Conference

Scientific paper

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.

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