The role of magnetic fields during the birth and death of stars

磁场在恒星诞生和死亡过程中的作用

• 批准号: 104673125
• 负责人: Professor Dr. Wouter H.T. Vlemmings
• 金额: --
• 依托单位: Onsala Space Observatory
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/104673125?language=en
• 关键词: role; magnetic; fields; during; birth

The study of the birth and death of stars is of fundamental importance. Stars and planetary systems are formed through complex physical processes during the collapse of gas clouds. At the end of a stars life, outflows are the main source of heavy elements that are essential for the formation of stars, planets and life. One of the main Emmy Noether application: Magnetism during stellar evolution questions that remain about the formation and final evolution of stars concerns the role of magnetic fields. Only polarization observations at different spatial scales are able to measure the strength and structure of magnetic fields during these stages of stellar evolution. Because stars in these evolutionary phases are highly obscured by dusty envelopes, they are best probed through observations of molecules and dust at submillimeter (0.3-1 mm) and radio (1-20 cm) wavelengths. The proposed research group will use state of the art submillimeter and radio instruments to examine the role and origin of magnetic fields during star-formation and in the outflows from evolved stars. These observations will reveal the importance of magnetism in regulating the creation of protostellar disks and outflows, as well as in driving and shaping the mass-loss of evolved stars.

研究恒星的生与死是非常重要的。恒星和行星系统是在气体云坍缩过程中通过复杂的物理过程形成的。在恒星生命结束时，外流是重元素的主要来源，这些重元素对恒星、行星和生命的形成至关重要。其中一个主要的埃米诺特应用：在恒星演化过程中的磁性问题仍然是关于恒星的形成和最终演化的磁场的作用。只有在不同空间尺度上的偏振观测才能测量恒星演化这些阶段的磁场强度和结构。由于处于这些进化阶段的恒星被尘埃包层高度遮蔽，因此最好通过亚毫米（0.3-1毫米）和射电（1-20厘米）波长的分子和尘埃观测来探测它们。拟议中的研究小组将使用最先进的亚毫米波和无线电仪器来研究磁场在恒星形成过程中以及在演化恒星外流中的作用和起源。这些观测将揭示磁性在调节原恒星盘和外流的形成以及驱动和塑造演化恒星质量损失方面的重要性。

项目成果

Unexpectedly large mass loss during the thermal pulse cycle of the red giant star R Sculptoris

红巨星 R Sculptoris 的热脉冲周期中意外的大量质量损失

• DOI: 10.1038/nature11511
• 发表时间: 2012
• 期刊: Nature
• 影响因子: 64.8
• 作者: Maercker;Mohamed;Vlemmings;Ramstedt;Groenewegen;Humphreys;Kerschbaum;Lindqvist;Olofsson;Paladini;Wittkowski;de Gregorio-Monsalvo
• 通讯作者: de Gregorio-Monsalvo

Rotten Egg nebula: the magnetic field of a binary evolved star

臭鸡蛋星云：双星演化恒星的磁场

• DOI: 10.1051/0004-6361/201118303
• 发表时间: 2012
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: Leal-Ferreira;Vlemmings;Diamond;Kemball;Desmurs
• 通讯作者: Desmurs

EVN observations of 6.7 GHz methanol maser polarization in massive star-forming regions

• DOI: 10.1051/0004-6361/201321501
• 发表时间: 2013-06
• 期刊: Astronomy & Astrophysics
• 作者: G. Surcis;W. Vlemmings;H. V. Langevelde;B. H. Kramer;Luis Henry Quiroga-Nuñez

Polarization of thermal molecular lines in the envelope of IK Tauri

IK Tauri 包膜中热分子线的偏振

• DOI: 10.1051/0004-6361/201218897
• 发表时间: 2012
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: Vlemmings;Ramstedt;Maercker
• 通讯作者: Maercker