Detection of HC/sup 18/O/sup +/ in Sagittarius B2

Journal Article · Thu Feb 01 04:00:00 EST 1979 · Astrophys. J., Lett.; (United States)

DOI:https://doi.org/10.1086/182885· OSTI ID:6464401

Guelin, M; Thaddeus, P

Line emission at 85.1 GHz attributed to the J=1..-->..O rotational transition of the formyl ion HC/sup 18/O/sup +/ has been detected in Sgr B2 (OH). The double isotopic ratio (/sup 16/O//sup 18/O)/(/sup 12/C//sup 13/C) in the formyl ion in Sgr B2 is estimated to be in the range 5--10, hence within a factor 2 of the terrestrial value 5.5. This determination implies that the /sup 13/C//sup 12/C ratio near the galactic center does not differ greatly from that in local molecular clouds.

• Research Organization: Goddard Institute for Space Studies, New York City
• OSTI ID: 6464401
• Journal Information: Astrophys. J., Lett.; (United States), Journal Name: Astrophys. J., Lett.; (United States) Vol. 227:3; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACYL RADICALS
CARBON ISOTOPES
CHEMICAL COMPOSITION
CHEMISTRY
COSMOCHEMISTRY
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FORMYL RADICALS
INTERSTELLAR SPACE
ISOTOPE RATIO
OXYGEN ISOTOPES
RADIATIONS
RADICALS
RADIOWAVE RADIATION
ROTATIONAL STATES
SPACE
SPECTRA