Far-infrared line emission from the Galaxy
Thesis/Dissertation
·
OSTI ID:5857289
The diffuse 157.74 ..mu..m (CII) emission from the Galaxy was sampled at several galactic longitudes near the galactic plane including complete scans across the plane at 2.16/sup 0/ and 7.28/sup 0/. The observed (CII) emission profiles follow closely the nearby /sup 12/CO (J = 1 ..-->.. 0) emission profiles. The (CII) emission probably arises in neutral photodissociation regions near the edges of giant molecular clouds (GMC's). These regions have densities approx. 350 cm/sup -3/ and temperatures T approx. 300/sup 0/K, and amount to approx. 4 x 10/sup 8/ M sub solar of hydrogen in the inner Galaxy. The total 157.74-..mu..m luminosity of the Galaxy is estimated to be approx. 6 x 10/sup 7/ L sub solar. The volume filling factor of the (CII) emitting regions is approx. 10/sup -3/. Estimates were also made of the galactic emission in other far-infrared (FIR) cooling lines. The (CII) line was found to be the dominant FIR emission line from the Galaxy and the primary coolant for the warm neutral gas near the galactic plane. Other FIR cooling lines predicted to be prominent in the galactic spectrum include the 51.82-..mu..m and 88.36-..mu..m fine structure lines of OIII and the 63.17-..mu..m and 145.53-..mu..m (OI) fine-structure lines. The OIII lines are principal coolants for the ionized gas while the OI lines are significant coolants for the warm neutral gas.
- Research Organization:
- Cornell Univ., Ithaca, NY (USA)
- OSTI ID:
- 5857289
- Country of Publication:
- United States
- Language:
- English
Similar Records
Far-infrared line emission from the galaxy
OI and OIII in Sgr A: neutral and ionized gas at the Galactic center
DETECTION OF THE 158 {mu}m [C II] TRANSITION AT z = 1.3: EVIDENCE FOR A GALAXY-WIDE STARBURST
Technical Report
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Mon Dec 31 23:00:00 EST 1984
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OSTI ID:5949437
OI and OIII in Sgr A: neutral and ionized gas at the Galactic center
Journal Article
·
Fri Apr 30 20:00:00 EDT 1982
· AIP Conf. Proc.; (United States)
·
OSTI ID:5289966
DETECTION OF THE 158 {mu}m [C II] TRANSITION AT z = 1.3: EVIDENCE FOR A GALAXY-WIDE STARBURST
Journal Article
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Sat May 01 00:00:00 EDT 2010
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OSTI ID:21448920
Related Subjects
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON IONS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELEMENTS
FAR INFRARED RADIATION
FINE STRUCTURE
GALAXIES
INFRARED RADIATION
INFRARED SPECTRA
IONS
MILKY WAY
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OXYGEN IONS
RADIATIONS
SPECTRA
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON IONS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELEMENTS
FAR INFRARED RADIATION
FINE STRUCTURE
GALAXIES
INFRARED RADIATION
INFRARED SPECTRA
IONS
MILKY WAY
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OXYGEN IONS
RADIATIONS
SPECTRA