Assignment of the λ1369.13 Diffuse Interstellar Absorption Band and Three Other Far‐Ultraviolet Interstellar Absorption Lines to the CH Molecule

2001 ◽  
Vol 555 (1) ◽  
pp. 472-476 ◽  
Author(s):  
James K. G. Watson
Keyword(s):  
Absorption Band ◽  
Absorption Lines ◽  
Interstellar Absorption ◽  
Far Ultraviolet

Absorption of OH in the 1200 Å Region

1974 ◽  
Vol 52 (4) ◽  
pp. 318-323 ◽  
Author(s):  
A. E. Douglas
Keyword(s):  
High Resolution ◽  
Absorption Band ◽  
Rydberg State ◽  
Strong Absorption ◽  
Absorption Lines ◽  
Strong Absorption Band ◽  
Interstellar Absorption

A strong absorption band of OH has been observed near 1221 Å. From the analysis of high resolution spectra, it has been determined that the upper state is a 2Σ− Rydberg state and the constants of the OH and the corresponding OD state have been obtained. It is shown that the new absorption band will give interstellar absorption lines of OH at 1221.166, 1222.071, and 1222.524 Å. New constants have also been determined for the A2Σ+ and X2Π states of OD.

Ultrafine Structure in the λ5797 Diffuse Interstellar Absorption Band

1998 ◽  
Vol 495 (2) ◽  
pp. 941-945 ◽  
Author(s):  
T. H. Kerr ◽  
R. E. Hibbins ◽  
S. J. Fossey ◽  
J. R. Miles ◽  
P. J. Sarre
Keyword(s):  
Absorption Band ◽  
Interstellar Absorption ◽  
Ultrafine Structure

scholarly journals 10. Radio observations of interstellar neutral hydrogen clouds

1957 ◽  
Vol 4 ◽  
pp. 66-66
Author(s):  
R. S. Lawrence
Keyword(s):  
Angular Resolution ◽  
Neutral Hydrogen ◽  
Optical Component ◽  
Absorption Lines ◽  
Radio Observations ◽  
Interstellar Absorption ◽  
Peak Intensity

The detailed relationship between optical interstellar absorption lines and 21-cm. observations is investigated in this paper.Dr Guido Münch, of the Mount Wilson and Palomar Observatories, provided the list of six intermediate-latitude stars shown in Table 1. The spectra of these stars all show complex absorption lines due to interstellar Ca 11. The 21-cm. line is measurable in four of the six regions, although the peak intensity is low in each case. It is noteworthy that for the first two stars on the list the radio velocity agrees closely with the velocity of an intense optical component. In view of the great difference in angular resolution, the failure to find correspondence in every case is not surprising.

A Discussion on astronomy in the ultraviolet - Observations of the interstellar gas with the Copernicus satellite

1975 ◽  
Vol 279 (1289) ◽  
pp. 299-302
Keyword(s):  
Absorption Lines ◽  
Heavy Elements ◽  
Interstellar Gas ◽  
Far Ultraviolet ◽  
Ultraviolet Observations

Recent results are summarized on interstellar H I, D I, H 2 , HD, and heavy elements whose absorption lines have been measured in the far ultraviolet.

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