まとめ
バルーンで運ばれるボロメーターを用いた遠赤外線天気調査は,星間粒子の熱放射線を探した. 月だけが検出され,他の天文源の上限を設定しました.
科学分野:
- 天文学と天体物理学について
- コスミック・マイクロ波・バックグラウンド・放射線
背景:
- 星間粒子は,星間媒体の重要な構成要素である.
- 遠赤外線放射は,宇宙の熱過程についての洞察を提供します.
研究 の 目的:
- 恒星間粒子の熱放射線を探すために.
- 空の遠赤外線放射の局所的な源を特定するために.
主な方法:
- 液体ヘリウムで冷却された気球搭載のゲルマニウムボロメーターを使用した.
- 遠赤外線観測のために,スペクトルフィルター付きの望遠鏡を使用しました.
- 北の銀河系を含む天球の約半分をカバーする調査を実施した.
主要な成果:
- 月からの熱放射線のみが検出されました.
- 他の源からの微分流量の上限を2x10{\displaystyle 2x10{\displaystyle 2x10{\displaystyle 2x10{\displaystyle 2x10{\displaystyle 2{\displaystyle 2{\displaystyle 2}) W/cm2/Hzで設定した.
- ブラックボディの発生源に対するシステムの反応は,主に300〜360ミクロンであった.
結論:
- 初期調査では,星間粒または他の局所的な源からの有意な遠赤外線熱放射線は検出されなかった.
- 月は,この機器で検出可能な遠赤外線放射の主要な源です.
- この研究は,将来の淡い宇宙源の探査のための重要な上限を設定しています.
関連する概念動画
01:09Infrared (IR) Spectroscopy: Overview
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Different compounds display unique properties due to their...
01:25IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
01:19IR Spectrum
When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0% (complete...
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0% (complete...
01:13Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...
01:11Applications of IR Spectroscopy: Overview
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
01:24IR Spectroscopy: Molecular Vibration Overview
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...