Physics
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...57d&link_type=abstract
NOAO Proposal ID #1999A-0057
Physics
Scientific paper
To investigate the effect that massive stars have on low-mass star formation, we are using the ages and masses of T Tauri stars in the (lambda) Ori star-forming region to deduce the chronology of stellar birth and to determine the initial mass function on large and small spatial scales. The OB stars in this region have dispersed much of their parent molecular cloud, leaving a tattered ring of molecular gas at the ionization front of the expanding H II region. We have employed a new survey technique this winter: a CMD-selected multi-object spectroscopic survey for lithium, a diagnostic of youth. Near (lambda) Ori, we have found 72 lithium-rich stars, 70 previously unknown. We propose to continue this survey in a field aligned radially away from (lambda) Ori to search for more lithium-rich stars. Thus, we will have a radial survey of young stars from the region center near the OB stars to the edge of the star-forming region. With this census in hand, we will look for spatial dependence of the mass function and age distribution.
Dolan Christopher J.
Mathieu Robert D.
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