Infrared studies of star formation in the rho Ophiuchi dark cloud
Thesis/Dissertation
·
OSTI ID:5225024
The author presents a near-infrared study of the stars forming in the {rho} Ophiuchi dark cloud and a mid- to far-infrared study of their environment. He determines that the total cloud luminosity matches that of the known embedded sources, ruling out the existence of a numerous but faint low-mass embedded population. IRAS and optically thin C{sup 18} O column density data are used to evaluate dust grain sizes and compositions via competing rain models. Radiative modeling shows that a standard power law distribution of graphite and silicate grains is responsible for IRAS 60- and 100-mm band emissions. These grains are heated to about one tenth of the cloud's depth in the core region. Their optical depths closely follow molecular column density structure, but these grains are considerably colder than the molecular gas. This study detected 481 sources in the J,H, or K bands in a 0.184 deg.{sup 2} survey region in the cloud. These newly discovered young stellar sources provide a statistically significant sample for studies of the cloud's embedded population and support established ideas of bound cluster formation and star formation bursts within the cloud.
- Research Organization:
- Arizona Univ., Tucson, AZ (United States)
- OSTI ID:
- 5225024
- Country of Publication:
- United States
- Language:
- English
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