Comparisons of C/sup +/ distributions with new interstellar sources of HCO emission

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/161185· OSTI ID:5542494

Hollis, J M; Churchwell, E

The formyl radical has been detected toward DR 21, Sgr B2, and NGC 2024 by means of its N/sub K//sup -/K/sup +/ = 1/sub 01/-0/sub 00/, J = 3/2-1/2, F = 2-1 transition. DR 21 and Sgr B2 are new sources of HCO emission. HCO has been detected toward NGC 2024 at the position of maximum carbon radio recombination line (CRRL) emission; this position is presently the source of the most intense HCO emission known in the Galaxy. The range of column densities, 3 x 10/sup 12/< or =N/sub HCO/ < or =2 x 10/sup 13/ cm/sup -2/, in the four clouds where observed demonstrates that HCO is one of the least abundant molecules presently detected by radio means in interstellar clouds.

• Research Organization: Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center
• OSTI ID: 5542494
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 271:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics &amp; Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ACYL RADICALS
CARBON IONS
CHARGED PARTICLES
EMISSION
ENERGY-LEVEL TRANSITIONS
FORMYL RADICALS
INTERSTELLAR GRAINS
IONS
NEBULAE
PARTICLES
RADICALS