THE NEAR INFRARED SPECTRUM OF THE NIGHT AIRGLOW OBSERVED FROM HIGH ALTITUDE

1964 ◽  
Vol 42 (6) ◽  
pp. 1037-1045 ◽  
Author(s):  
H. P. Gush ◽  
H. L. Buijs
Keyword(s):  
Infrared Spectrum ◽  
Emission Spectrum ◽  
High Altitude ◽  
Electronic Transition ◽  
Near Infrared ◽  
Michelson Interferometer ◽  
Infrared Emission ◽  
Upper Atmosphere ◽  
Transition Formula ◽  
First Time

The infrared emission spectrum of the upper atmosphere between 1.2 and 2.5 microns has been measured at night by means of a Michelson interferometer carried to an altitude of 90,000 feet by a balloon. The complete Δν = 2 sequence of rotation–vibration OH bands has been observed at a resolution sufficient to resolve the rotational structure. The (0, 0) band of the electronic transition [Formula: see text] of oxygen at 1.27 microns has been observed in the night-sky spectrum for the first time. Its brightness is comparable with that of the (4, 2) OH band at 1.6 microns.

A discussion on infared astronomy - The emission spectrum of the night airglow from 2 to 4μm

1969 ◽  
Vol 264 (1150) ◽  
pp. 161-161
Keyword(s):  
Infrared Spectrum ◽  
Emission Spectrum ◽  
High Altitude ◽  
Emission Band ◽  
Night Airglow

The infrared spectrum of the airglow in the region 2 to 4 μm has been measured with a two-beam interferometer carried to high altitude by a balloon. The aV= 1 sequence of OH bands is in evidence as well as an emission band of CO 2 .

AN IMPROVED TECHNIQUE FOR THE OBSERVATION OF INFRARED CHEMILUMINESCENCE: RESOLVED INFRARED EMISSION OF OH ARISING FROM THE SYSTEM H + O2

1960 ◽  
Vol 38 (10) ◽  
pp. 1742-1755 ◽  
Author(s):  
P. E. Charters ◽  
J. C. Polanyi
Keyword(s):  
Infrared Spectrum ◽  
Electronic State ◽  
Vibrational Temperature ◽  
Infrared Emission ◽  
Multiple Reflection ◽  
Ground Electronic State ◽  
Oh Radicals ◽  
Vibrationally Excited ◽  
Improved Technique ◽  
First Time

A multiple reflection apparatus for the observation of infrared chemiluminescence is described. By means of this apparatus infrared emission from the system H + O2 has been identified as being due to vibrationally excited OH radicals in levels v = 1, 2, and 3 of the ground electronic state. The resolved infrared spectrum of the OH fundamental has been observed for the first time without interference from other emission. The most likely source of excited OH is the reaction H + HO2 → OH† + OH. The vibrational 'temperature' of OH† (vibrationally excited OH in its ground electronic state) in our system is in the region of TV = 2240 °K. These findings are discussed in relation to Krassovsky's suggestion that reaction between H and O2 could account for the Meinel hydroxyl bands in the night sky.

scholarly journals Thermosphere and exosphere of hot Jupiters

2008 ◽  
Vol 4 (S253) ◽  
pp. 281-287
Author(s):  
Alain Lecavelier des Etangs
Keyword(s):  
High Altitude ◽  
Theoretical Modeling ◽  
Giant Planets ◽  
Upper Atmosphere ◽  
Escape Rate ◽  
Energy Diagram ◽  
Lyman Alpha ◽  
Hot Jupiters ◽  
First Time ◽  
Very High

AbstractHere we describe the observations and the resulting constraints on the upper atmosphere (thermosphere and exosphere) of hot Jupiters. In particular, observations and theoretical modeling of hot-Jupiter evaporation are described. The observations allowed the discovery that the planet orbiting HD209458 has an extended atmosphere of escaping hydrogen and showed the presence of oxygen and carbon at very high altitude. These observations give unique constraints on the escape rate and mechanism in the atmosphere of these planets. The most recent Lyman-alpha HST observations of HD189733b allow for the first time to compare the evaporation from two different planets in different environments. We present models to quantify the escape rate from the measured occultation depths, and an energy diagram to describe the evaporation state of hot Jupiters. Using this diagram, it is shown that few already known planets could be remnants of former giant planets.

Near Infrared Emission Spectrum of the H, O3 Reaction

1956 ◽  
Vol 25 (3) ◽  
pp. 585-586 ◽  
Author(s):  
T. M. Cawthon ◽  
J. D. McKinley
Keyword(s):  
Emission Spectrum ◽  
Near Infrared ◽  
Infrared Emission ◽  
Near Infrared Emission

scholarly journals First demonstration of OH suppression in a high-efficiency near-infrared spectrograph

2020 ◽  
Vol 492 (2) ◽  
pp. 2796-2806 ◽  
Author(s):  
S C Ellis ◽  
J Bland-Hawthorn ◽  
J S Lawrence ◽  
A J Horton ◽  
R Content ◽  
...  
Keyword(s):  
Temporal Variability ◽  
Near Infrared ◽  
High Efficiency ◽  
Nir Spectroscopy ◽  
Upper Atmosphere ◽  
Emission Lines ◽  
Spatial And Temporal Variability ◽  
Atmospheric Emission ◽  
Fibre Bragg Gratings ◽  
First Time

ABSTRACT Ground-based near-infrared (NIR) astronomy is severely hampered by the forest of atmospheric emission lines resulting from the rovibrational decay of OH molecules in the upper atmosphere. The extreme brightness of these lines, as well as their spatial and temporal variability, makes accurate sky subtraction difficult. Selectively filtering these lines with OH suppression instruments has been a long standing goal for NIR spectroscopy. We have shown previously the efficacy of fibre Bragg gratings (FBGs) combined with photonic lanterns for achieving OH suppression. Here we report on PRAXIS, a unique NIR spectrograph that is optimized for OH suppression with FBGs. We show for the first time that OH suppression (of any kind) is possible with high overall throughput (18 per cent end-to-end), and provide examples of the relative benefits of OH suppression.

scholarly journals A ground-based near-infrared emission spectrum of the exoplanet HD 189733b

Nature ◽  
2010 ◽  
Vol 463 (7281) ◽  
pp. 637-639 ◽  
Author(s):  
Mark R. Swain ◽  
Pieter Deroo ◽  
Caitlin A. Griffith ◽  
Giovanna Tinetti ◽  
Azam Thatte ◽  
...  
Keyword(s):  
Emission Spectrum ◽  
Near Infrared ◽  
Infrared Emission ◽  
Near Infrared Emission

The antisymmetric stretching fundamental band of free MgD2

2004 ◽  
Vol 82 (6) ◽  
pp. 947-950 ◽  
Author(s):  
Alireza Shayesteh ◽  
Dominique RT Appadoo ◽  
Iouli Gordon ◽  
Peter F Bernath
Keyword(s):  
Fourier Transform ◽  
Emission Spectrum ◽  
Electrical Discharge ◽  
Bond Distance ◽  
Infrared Emission ◽  
Fourier Transform Spectrometer ◽  
High Temperature Furnace ◽  
Vibration Rotation ◽  
First Time ◽  
Temperature Furnace

The gaseous MgD2 molecule has been synthesized for the first time in an electrical discharge inside a high-temperature furnace. The high-resolution infrared emission spectrum of MgD2 was recorded with a Fourier transform spectrometer, and the antisymmetric stretching mode (v3) was detected near 1176.5 cm–1. The v3 band was rotationally analyzed, and the r0 Mg—D bond distance was determined to be 1.700 874(8) Å.Key words: gaseous MgD2, vibration-rotation emission spectrum, Mg-D bond distance.

Near infrared emission spectrum of HCN

2008 ◽  
Vol 249 (1) ◽  
pp. 23-42 ◽  
Author(s):  
Georg Ch. Mellau ◽  
Brenda P. Winnewisser ◽  
Manfred Winnewisser
Keyword(s):  
Emission Spectrum ◽  
Near Infrared ◽  
Infrared Emission ◽  
Near Infrared Emission

Near infrared emission spectrum of H13CN

2010 ◽  
Vol 262 (2) ◽  
pp. 75-81 ◽  
Author(s):  
Jan Philipp Hofmann ◽  
Bianca Eifert ◽  
Georg Ch. Mellau
Keyword(s):  
Emission Spectrum ◽  
Near Infrared ◽  
Infrared Emission ◽  
Near Infrared Emission
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