Line excess in low-luminosity young stellar objects

Details Line excess in low-luminosity young stellar objects Line excess in low-luminosity young stellar objects

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..784t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 15, 1987, p. 784-787.

Physics

27

Infrared Spectra, Line Spectra, Pre-Main Sequence Stars, Star Formation, Stellar Evolution, Stellar Luminosity, Stellar Physics

Scientific paper

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.

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