NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
High Resolution Near-IR Spectroscopy of Protostars With Large TelescopesIt is now possible to measure absorption spectra of Class I protostars using D greater than or = 8m telescopes equipped with sensitive cryogenic IR spectrographs. Our latest high-resolution (R approx. 20,000) Keck data reveal that Class I protostars are indeed low-mass stars with dwarf-like features. However, they differ from T Tauri stars in that Class I protostars have much higher IR veilings (tau(sub k) greater than or = 1 - 3+) and they are rotating quickly, v sin i greater than 20 km/s. Interestingly, the vast majority of protostellar absorption spectra show stellar - not disk - absorption features. A preliminary H-R diagram suggests that protostellar photospheres may have different physical structures than T Tauri stars, perhaps due to their higher accretion rates.
Document ID
20010050100
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Greene, Tom
(NASA Ames Research Center Moffett Field, CA United States)
DeVincenzi, Donald L.
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Chemistry And Materials (General)
Meeting Information
Meeting: The ESO Origins of Stars and Planets: The LTV View
Location: Munich
Country: Germany
Start Date: April 24, 2001
End Date: April 27, 2001
Funding Number(s)
PROJECT: RTOP 344-37-44
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available