X-Ray Diagnostics from Young Stellar Objects
Date Issued
2010
Date
2010
Author(s)
Lin, Wei-Chieh
Abstract
Magnetic field and its activities are believed to play an important role in the low-mass star formation. High-energy radiations near the low-mass young stellar objects are detected and strongly believed to be the products of magnetic activities. The fine-structure transitions of NeII and NeIII at 12.81 and 15.55 is proposed to be the tracer of the high-energy radiation, X-ray by Glassgold et al. 2007. We use X-wind model of jets to calculate the flux and line shape of these lines for young stellar objects with a range of mass-loss rates and X-ray luminosities. All the line luminosities correlate well with the main parameter in the X-wind model, the mass-loss rate, and with the X-ray luminosity, and with one another. The line shapes are broad and have strong blue-shifted peaks near the effective terminal velocity of the jet. This characteristic provides a testable aspect of jet production of neon fine-structure lines and the OI forbidden transitions.
Subjects
Star Formation
X-Ray
Jets
Low-mass
Infrared
Type
thesis
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