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.

scholarly journals Interstellar Matter with Very Large Telescopes

1984 ◽  
Vol 79 ◽  
pp. 675-678
Author(s):  
J. Lequeux
Keyword(s):  
High Resolution ◽  
Absorption Lines ◽  
High Resolution Spectroscopy ◽  
Interstellar Matter ◽  
Large Telescope ◽  
Interstellar Absorption ◽  
Near Ir ◽  
Very Large Telescope ◽  
Large Telescopes ◽  
Diffuse Matter

Interstellar matter is certainly one of the fields where a very large telescope (VLT) will prove to be most fruitful. This includes (somewhat paradoxically, but this will be explained later) the study of extended emissions. I will now examine in turn the different domains of interest for a VLT.I. Neutral diffuse matterOptical and near IR observations will mainly contribute to this domain through high-resolution spectroscopy of interstellar absorption lines in the spectra of stars. These lines are resonant lines of atoms (NaI, KI, etc.) or ions (CaII, TiII, etc.) as well as of some molecules (CH+, CH, CN, CS+, C2 in the near IR). Clearly this kind of study is always photon - limited; a VLT will collect more photons than present telescopes, thus increase the possibilities considerably.

scholarly journals Atomic and Molecular Interstellar Absorption Lines toward the High Galactic Latitude Stars HD 141569 and HD 157841 at Ultra–High Resolution

1998 ◽  
Vol 504 (1) ◽  
pp. 522-532 ◽  
Author(s):  
M. S. Sahu ◽  
J. C. Blades ◽  
L. He ◽  
Dap Hartmann ◽  
M. J. Barlow ◽  
...  
Keyword(s):  
High Resolution ◽  
Absorption Lines ◽  
Galactic Latitude ◽  
High Galactic Latitude ◽  
Interstellar Absorption

Expanding the strong absorption band by impedance matched mosquito-coil-like acoustic metamaterials

2020 ◽  
Vol 91 (2) ◽  
pp. 025102
Author(s):  
Mingming Hou ◽  
Junxiang Wu ◽  
Shaokun Yang ◽  
Jiu Hui Wu ◽  
Fuyin Ma
Keyword(s):  
Absorption Band ◽  
Strong Absorption ◽  
Acoustic Metamaterials ◽  
Mosquito Coil ◽  
Strong Absorption Band

Interstellar absorption lines in high-resolution IUE spectra of cataclysmic variables

1988 ◽  
Vol 335 ◽  
pp. 829 ◽  
Author(s):  
Christopher W. Mauche ◽  
John C. Raymond ◽  
France A. Cordova
Keyword(s):  
High Resolution ◽  
Cataclysmic Variables ◽  
Absorption Lines ◽  
Interstellar Absorption

scholarly journals Observation of precursorlike behavior of femtosecond pulses in a dye with a strong absorption band

2011 ◽  
Vol 83 (4) ◽  
Author(s):  
Matthew M. Springer ◽  
Wenlong Yang ◽  
Alexandre A. Kolomenski ◽  
Hans A. Schuessler ◽  
James Strohaber ◽  
...  
Keyword(s):  
Absorption Band ◽  
Strong Absorption ◽  
Femtosecond Pulses ◽  
Strong Absorption Band
Sign in / Sign up

Export Citation Format

Share Document