Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...383..336b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 10, 1991, p. 336-343.
Astronomy and Astrophysics
Astronomy
12
H Lines, Hydrogen Recombinations, Infrared Sources (Astronomy), Infrared Spectra, Pre-Main Sequence Stars, Infrared Astronomy Satellite, Interstellar Extinction, Maximum Entropy Method, Southern Sky, Stellar Mass Ejection
Scientific paper
Near infrared recombination lines of hydrogen are observed in twelve young objects in the southern Galactic plane. The sample includes Herbig-Haro objects and IRAS dark-cloud point sources from the 1987 catalog of Persson and Campbell. In four of the IRAS sources two or three infrared lines are measured, and their intensity ratios are consistent with models of optically thick ionized winds. The intrinsic line shapes, retrieved from maximum-entropy deconvolutions, indicate gas velocities of 100 km/s or more as expected from ionized winds. These sources are apparently embedded pre-main-sequence objects with outflows. They include some of the brightest known YSOs.
Beck Sara C.
Fischer Jacqueline
Smith Howard A.
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