arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1003.5258astro-ph.SR
收藏

耀斑对太阳总辐照度的影响

The effect of flares on total solar irradiance

Matthieu Kretzschmar, Thierry Dudok de Wit, Werner Schmutz, Sabri Mekaoui, Jean-François Hochedez, Steven Dewitte

摘要:

耀斑是发生在恒星大气中的强大能量释放。太阳耀斑是太阳系中最强烈的能量爆发,但在太阳总光度中却很难被注意到。因此,它们辐射的总能量1)在很大程度上仍然是未知的,2)被忽视为总太阳辐照度(TSI)变化的潜在贡献者,即在地球上接收的总太阳通量。在这里,我们报告的耀斑信号的检测在TSI即使是中度耀斑。我们发现,耀斑辐射的总能量超过软X射线辐射的两个数量级,在可见光区的重要贡献。这些结果对耀斑的物理学和我们恒星的可变性有影响。

英文摘要:

Flares are powerful energy releases occurring in stellar atmospheres. Solar flares, the most intense energy bursts in the solar system, are however hardly noticeable in the total solar luminosity. Consequently, the total amount of energy they radiate 1) remains largely unknown and 2) has been overlooked as a potential contributor to variations in the Total Solar Irradiance (TSI), i.e. the total solar flux received at Earth. Here, we report on the detection of the flare signal in the TSI even for moderate flares. We find that the total energy radiated by flares exceeds the soft X-ray emission by two orders of magnitude, with an important contribution in the visible domain. These results have implications for the physics of flares and the variability of our star.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑