Shocked molecular hydrogen emission from Herbig-Haro objects and their exciting stars

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115333· OSTI ID:6577631

Wilking, B A; Schwartz, R D; Mundy, L G; Schultz, A S.B. ^[1]

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1. Missouri Univ., Saint Louis (USA) Maryland Univ., College Park (USA) Washington Univ., Saint Louis, MO (USA)

The results of an H2 emission-line survey of the 1-0 S(1) transition from 33 Herbig-Haro objects and suspected Herbig-Haro objects are presented. The survey focuses on Herbig-Haro objects that have been recently identified and/or lie at southern declinations. Data are also presented for the 2-1 S(3), 1-0 Q(1), and 1-0 Q(3) transitions of H2 for a subset of the sample. H2 emission has been detected toward 16 Herbig-Haro or nebulous objects; published optical spectra of 13 of these objects suggest that they are low-excitation nebulae associated with low-velocity shocks. H2 has also been detected toward the emission-line stars RU Lup and LkH-alpha 234. Extended 1-0 S(1) emission has been mapped in the vicinity of gas outflows associated with the emission-line stars R CrA and LkH-alpha 234 and appears to delineate the blueshifted molecular gas in these bipolar outflows. A comparison of the data, in combination with the atomic line data from these HHs, is made with current C- and J-type shock models. 41 refs.

• OSTI ID: 6577631
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC GASES
ELEMENTS
EMISSION SPECTRA
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HEATING
HERBIG-HARO OBJECTS
HYDROGEN
MOLECULES
NEBULAE
NONMETALS
SHOCK WAVES
SPECTRA
VISIBLE SPECTRA