Line excess in low-luminosity young stellar objects
Journal Article
·
· Astrophys. J.; (United States)
Infrared spectra of 13 low-luminosity young stellar objects (YSOs) indicate that a majority have excess hydrogen line emission. This is in contradiction to a simple model of excess recombination line emission due to ionization from the first excited level of hydrogen. Thermal neutral atomic emission models do not violate energy conservation but require a few percent of the total luminosity utilized in heating an extended emission region. Whether there is a similar line excess emission mechanism for low- and high-luminosity YSOs is still open to question. 21 references.
- Research Organization:
- Steward Observatory, Tucson, AZ
- OSTI ID:
- 6542543
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 312; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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