Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542929c&link_type=abstract
American Astronomical Society, AAS Meeting #215, #429.29; Bulletin of the American Astronomical Society, Vol. 42, p.354
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of a near-IR spectroscopic survey of 110 Class I protostars. Our photospheric spectral type distribution shows that there is a dearth of early type protostars in the Taurus, Auriga, and Perseus star forming regions, consistent with those regions not having high mass stars. Many of the early type protostars are in the Orion and Ophiuchis regions. We find that about half of M-type protostars have triangular H-band continuua, characteristic of low gravity. Analysis of the He I line at 1.08 microns finds a similar range of profiles as has been observed in T Tauri star, but with greater velocities. FU Orionis-like stars show only blue shifted absorption, with an outflow velocity as high as 700 km/s. Multiepoch observations show that the Brackett Gamma equivalent width's average change is 32%, and is 46% for CO. The variability of these lines does not appear to have any preferred time scale. We find a strong correlation between the changes in [Fe II] and H2, reinforcing the conclusion that H2 is shock excited. This work has been funded by NASA.
Connelley Michael S.
Greene Thomas
No associations
LandOfFree
Results From A Near-IR Spectroscopic Survey of Class I Protostars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Results From A Near-IR Spectroscopic Survey of Class I Protostars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Results From A Near-IR Spectroscopic Survey of Class I Protostars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-967828