関連する実験動画
Updated: Jun 28, 2026

10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
CoRoTは太陽のような振動と,太陽よりも熱い星の粒子を測定しています
Eric Michel1, Annie Baglin, Michel Auvergne
1Laboratoire d'Etudes Spatiales et d'Instrumentation Astrophysique (LESIA), Observatoire de Paris, CNRS (UMR 8109)-Université Paris 6 Pierre et Marie Curie-Université Paris 7 Denis Diderot, Place Jules Janssen, F-92195 Meudon, France. Eric.Michel@obspm.fr
まとめ
CoRoT衛星は,太陽よりも熱い恒星の星の振動と粒子を研究した. 振動振幅は高かったが,理論的な値以下で,恒星の外層に関する洞察を明らかにした.
科学分野:
- * 星の天体物理学とアステロ地震学.
- * 振動分析を通じて恒星の内部と外層を調査する.
背景:
- *ヘリオ地震学は太陽の振動を用いて,太陽の内部構造を調査する.
- *他の恒星の振動 (天体地震学) を研究することは,大きな課題を提示する.
- * CoRoT (コンベクション・ローテーション・アンド・プラネタリ・トランジット) ミッションは,これらの課題を克服することを目的とした.
研究 の 目的:
- * 太陽よりも熱いメインシーケンスの恒星における振動と恒星粒子を測定する.
- *これらの測定値を理論的な予測と比較する.
- * 恒星の振動を制御する非アディアバティックなプロセスを調査する.
主な方法:
- * CoRoT衛星のデータを活用した.
- * 測定された振動振幅と恒星の粒子のシグネチャー.
- * 太陽よりも熱い3つのメインシーケンス星を分析した.
主要な成果:
- *観測された振動振幅は,太陽値の約1.5倍です.
- * 測定された恒星の粒度量は太陽の3倍以上です.
- * 振動振幅が理論的な予測より約25%低いことが判明しました.
結論:
- * CoRoTのデータは,太陽よりも熱い星の内部について貴重な洞察を提供します.
- * 観測と理論の振幅の差異は,非アディアバティック性の測定を提供します.
- *この研究は,恒星の外層における振動過程の理解を深める.
関連する概念動画
Flame Photometry: Overview
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
Flame Photometry: Lab
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
Kepler's Second Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
Kepler's First Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
Kepler's Third Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
Emission Spectra
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.

