Proto-planetary nebulae. II - The shock-heated bipolar nebulae GL 618 and M2-56

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170313· OSTI ID:5260175

Goodrich, R W ^[1]

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1. McDonald Observatory, Austin, TX (United States)

Long-slit CCD spectroscopy has been used to study the two peculiar, very low ionization protoplanetary nebulae, GL 618 and M2-56, comparing the results obtained with observed Herbig-Haro (HH) objects' spectra as well as with theoretical shock-model calculations from the literature. It is found that the spectra of low-excitation HH objects match the spectra of GL 618 and M2-56; in addition, the shock models indicate the presence of shock velocities in the 40-100 km/sec range, which is again congruent with low excitation HH object results. 37 refs.

• OSTI ID: 5260175
• Journal Information: Astrophysical Journal; (United States), Vol. 376; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
PLANETARY NEBULAE
SPECTROSCOPY
COMPARATIVE EVALUATIONS
HERBIG-HARO OBJECTS
SHOCK HEATING
STAR EVOLUTION
STAR MODELS
EVALUATION
HEATING
MATHEMATICAL MODELS
NEBULAE
PLASMA HEATING
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources