US-France Cooperative Research: Radio Observations of FlareStars

该奖项将支持科罗拉多大学的George Dulk博士和法国Meudon巴黎天文台的Alain Lecacheux博士在射电天文学方面的合作研究。研究人员提议对两颗耀斑恒星的射电观测进行联合分析，这些观测是使用新的宽带高分辨率法国射电光谱仪在Meudon进行的。被称为耀斑的能量的快速释放经常发生在太阳和某些类别的恒星上，特别是“耀斑恒星”。能量释放的方式在很大程度上是未知的，甚至储存能量的位置也仍然存在争议。拟议研究的主要目的是研究少数活动耀斑恒星上耀斑的射电辐射的时间和光谱特性，将其与太阳耀斑的特性进行比较，并推断耀斑体积中的发射机制和条件。该项目将受益于美国和法国集团的互补技能。杜尔克博士在天体物理等离子体物理学以及太阳和恒星射电辐射的观测、解释和理论方面拥有丰富的经验。巴黎天文台的这个小组在太阳和行星射电辐射的理论和观测方面拥有丰富的专业知识。拟议中的项目将增加关于恒星火焰特征的有价值的新信息，并可能对恒星火焰和太阳火焰中的能量释放机制产生新的见解。

This award will support collaborative research in radio astronomy between Dr. George Dulk, University of Colorado and Dr. Alain Lecacheux, Observatory of Paris, Meudon, France. The investigators propose to perform a joint analysis of radio observations of two flare stars made using the new wide-band, high resolution French radio spectrometer at Meudon. Rapid releases of energy called flares occur frequently on the Sun and on certain classes of stars, particularly "flare stars". The manner by which the energy is released is largely unknown, and even the location of the stored energy remains controversial. The main objective of the proposed research is to study the temporal and spectral properties of the radio radiation of flares on a small number of active flare stars, to compare them with the properties of solar flares, and to infer the emission mechanisms and the conditions in the flaring volume. The project will benefit from the complementary skills of the US and French groups. Dr. Dulk has considerable experience in astrophysical plasma physics, as well as in the observation, interpretation and theory of solar and stellar radio emissions. The group at the Observatory of Paris has significant expertise in the theory and observation of solar and planetary radio emissions. The proposed project will add valuable new information on the character of stellar fires and may yield new insight into the mechanism of energy release in stellar and solar flames.