Abstract
view Abstract Citations (11) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Radio Recombination Line in the Spectrum of W44 Bignell, R. C. Abstract A H 1 66a recombination line was found in the continuum spectrum of W44 and in the weak galactic emission about three-quarters of a degree away. The lines are weak, but there is a difference in their structure. The recombination-line parameters are compared with the neutral hydrogen and molecular line parameters. It is suggested that the supernova explosion of W44 may be responsible for ionizing the gas which is emitting the H 1 66e line. This possibility is discussed; however, it is concluded that due to insufficient observations, emission from diffuse gas not associated with W44 or from an H ii region that has line-of-sight coincidence with W44 cannot be ruled out. The absence of H 1 66a absorption or stimulated emission is used to estimate upper limits to the ionization rate of the gas in front of W44. These limits are compatible with other published estimates of the ionization rate of the interstellar material. Subject headings: interstellar matter - nebulae - radio lines - supernovae Publication: The Astrophysical Journal Pub Date: December 1973 DOI: 10.1086/152553 Bibcode: 1973ApJ...186..889B full text sources ADS |
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
