scholarly journals Evaluating Use of the NASA Nowcastof Atmospheric Ionizing Radiation for Aviation Safety (NAIRAS) System for Verifying/Validating AMS Cosmic Background Radiation Measurements, RSLA-006-20, Year 1

2020 ◽  
Author(s):  
Benjamin McGee
Keyword(s):  
Ionizing Radiation ◽  
Background Radiation ◽  
Cosmic Background Radiation ◽  
Aviation Safety ◽  
Cosmic Background ◽  
Radiation Measurements

CN spectroscopy and cosmic background radiation measurements

2004 ◽  
Vol 82 (6) ◽  
pp. 730-739 ◽  
Author(s):  
Sydney Leach
Keyword(s):  
Background Radiation ◽  
Cosmic Background Radiation ◽  
Oscillator Strengths ◽  
Rotational Line ◽  
Published Data ◽  
Cosmic Background ◽  
Rotational Components ◽  
Π State ◽  
Radiation Measurements

A source of possible error, not previously considered, in the determination of the cosmic background radiation (CBR) temperature Tγ(CN) from interstellar CN absorption is proposed. This concerns the intrinsic assumption of the validity of using Hönl–London rotational line intensity factors to determine the rotational components of the oscillator strengths of the R(0), R(1), and P(1) lines of the CN B2Σ+–X2Σ+ (0,0) transition. Published data on interstellar CN absorption shows that Tγ(CN) is slightly greater than the standard cosmological CBR temperature, Tγ(COBE) = 2.725 K, determined by the COBE satellite, even when local excitation effects of CN are taken into account. From this difference, an estimation was made of the maximum corrections, a few percent, to the ratio of the line strengths and to the ratio of the Hönl–London factors. Fluorescence lifetime data were shown to give similar values for the corrections as well as providing evidence for intramolecular coupling between the relevant B2Σ+ state rotational levels and close-lying levels of the A2Π state, this being responsible for rendering the standard Hönl–London factors invalid. Key words: CN spectroscopy, cosmic background radiation, Hönl–London factors.

scholarly journals Introductory Remarks

2001 ◽  
Vol 204 ◽  
pp. 5-15
Author(s):  
P. J. E. Peebles
Keyword(s):  
Star Formation ◽  
Background Radiation ◽  
Cosmic Background Radiation ◽  
Morphological Type ◽  
Star Formation History ◽  
Cosmic Background ◽  
Formation History ◽  
Infrared Background

I review the assumptions and observations that motivate the concept of the extragalactic cosmic background radiation, and the issues of energy accounts and star formation history as a function of galaxy morphological type that figure in the interpretation of the measurements of the extragalactic infrared background.

South Pole studies of the anisotropy of the cosmic background radiation at one degree

1990 ◽  
Author(s):  
Peter R. Meinhold ◽  
Philip M. Lubin ◽  
Alfredo O. Chingcuanco ◽  
Jeff A. Schuster ◽  
Michael Seiffert
Keyword(s):  
Background Radiation ◽  
Cosmic Background Radiation ◽  
South Pole ◽  
Cosmic Background
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