Molecular hydrogen and the 2 micron spectrum of NGC 7027

Journal Article · Sun Mar 15 04:00:00 EST 1981 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/158758· OSTI ID:6457692

Smith, H A; Larson, H P; Fink, U

The spectrum of the planetary nebula NGC 7027 is presented from 1.6--2.5 ..mu..m with a resolution of 1.2 cm/sup -1/. The presence of molecular hyrodgen emission in the upsilon = 1--0 S(1), and Q(3) lines is confirmed, and the detection of the H/sub 2/ lines upsilon = 1--0 Q(2), Q(4), S(0), and S(2) is reported. The H/sub 2/ line strengths, with upper limits for the upsilon = 2--1 band, suggest a model in which the emitting gas is confined to clumps heated by a shock front accompanying an expanding H II region.

• Research Organization: Lunar and Planetary Laboratory, University of Arizona
• OSTI ID: 6457692
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 244:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
H2 REGIONS
HYDROGEN
INFRARED SPECTRA
MOLECULES
NEBULAE
NONMETALS
PLANETARY NEBULAE
RADIATIONS
SHOCK WAVES
SPECTRA
ULTRAVIOLET RADIATION