POLSTAR Survey: Magnetic Fields in Star Forming Filaments

POLSTAR 巡天：恒星形成细丝中的磁场

• 批准号: 2309536
• 负责人: Thushara Pillai
• 金额: $ 47.86万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-01-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309536&HistoricalAwards=false
• 关键词: POLSTAR; Survey; Magnetic; Fields; Star

Polarized thermal emission from spinning dust grains that align themselves with the magnetic field can be used to trace the magnetic field structure projected onto the plane of the sky. With powerful polarimeters on new facilities, the window to the polarized sky is just opening up now. This makes a systematic investigation into magnetic fields in galaxies a very timely project. This investigator created the POLSTAR survey of selected star forming regions in the Milky Way. Her team is combining existing images with new observations of the polarization properties of these objects. With POLSTAR, the team has capitalized on this technical progress to acquire a unique and comprehensive data set of polarized dust and line emission on several world class telescopes to develop a comprehensive vision of the magnetized dense interstellar medium. The investigator’s work aims to clarify how magnetic fields affect star formation in high-mass dense filamentary dark clouds and how the fields change when stars form. Through this award, a graduate student will be trained, and several high-school minority students will have the opportunity to work with astronomical data visualization and analysis tools. Using POLSTAR data investigators team will provide the most comprehensive multi-wavelength overview of the role of magnetic fields in forming high-mass dark clouds and stars within them. They seek to understand the evolution of a high-mass dark clouds and how magnetic fields change the star formation process. The magnetic fields are thought to slow down star formation and the team will measure the density threshold where the fields give way to gravity. Analysis of the multi-wavelength multi-scale polarization data will be crucial to constrain theories on how spinning dust grains align. In conjunction with mock observations using advanced simulations of clouds with different input magnetic field strengths, this project will provide images of the initial conditions for star-formation in an important sample of Milky Way Clouds.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

从旋转的粉尘晶粒与磁场对齐的旋转粉尘晶粒的偏振热发射可用于追踪投射到天空平面上的磁场结构。在新设施上有强大的偏光仪，偏光天空的窗户现在正开放。这使得在星系中对磁场的系统投资是一个非常及时的项目。该研究人员以银河系的方式对选定的恒星形成区域进行了POLSTAR调查。她的团队正在将现有图像与这些对象的两极分化属性的新观察结合在一起。借助Polstar，该团队已经利用了这一技术进度，以在几种世界一流的望远镜上获得独特而全面的数据集，以千极万化的灰尘和线排放，以开发磁化密集的星际介质的全面愿景。研究者的工作旨在阐明磁场如何影响高质量密集的丝状暗云以及恒星形成时磁场的变化。通过该奖项，将对研究生进行培训，几名高中生学生将有机会使用天文学数据可视化和分析工具。使用POLSTAR数据调查人员团队将提供最全面的多波长概述，以了解磁场在形成高质量乌云和恒星中的作用。他们试图了解高质量乌云的演变以及磁场如何改变恒星形成过程。磁场被认为会减慢恒星的形成，团队将测量磁场让位于重力的密度阈值。多波长多尺度极化数据的分析对于旋转尘埃谷物如何对齐的约束理论至关重要。结合使用具有不同输入磁场强度的云的高级模拟的模拟观察，该项目将提供最初的恒星形成条件的图像，以云的重要样本。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响审查的审查标准来通过评估来通过评估来支持的。

项目成果

Fragmentation of the High-mass “Starless” Core G10.21-0.31: A Coherent Evolutionary Picture for Star Formation

• DOI: 10.3847/1538-4357/acb211
• 发表时间: 2023-01
• 期刊: The Astrophysical Journal
• 作者: Wenyu Jiao;Ke Wang;T. Pillai;T. Baug;Siju Zhang;F. Xu

The distance to the Serpens South cluster from H 2 O masers

H 2 O脉泽到巨蛇南星团的距离

• DOI: 10.1051/0004-6361/202346369
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Ortiz-León, Gisela N.;Dzib, Sergio A.;Loinard, Laurent;Gong, Yan;Pillai, Thushara;Plunkett, Adele
• 通讯作者: Plunkett, Adele

The Haystack Telescope as an Astronomical Instrument

• DOI: 10.3390/galaxies11010009
• 发表时间: 2023-01
• 期刊: Galaxies
• 影响因子: 2.5
• 作者: J. Kauffmann;G. Rajagopalan;K. Akiyama;V. Fish;C. Lonsdale;L. Matthews;T. Pillai

Infall and outflow towards high-mass starless clump candidates

流入和流出大质量无星团簇候选者

• DOI: 10.1093/mnras/stad1073
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Pillai, T. G. S.;Urquhart, J. S.;Leurini, S.;Zhang, Q.;Traficante, A.;Colombo, D.;Wang, K.;Gomez, L.;Wyrowski, F.
• 通讯作者: Wyrowski, F.

CMZoom III: Spectral line data release

CMZoom III：谱线数据发布

• DOI: 10.1093/mnras/stad388
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Callanan, Daniel;Longmore, Steven N.;Battersby, Cara;Hatchfield, H. Perry;Walker, Daniel L.;Henshaw, Jonathan;Keto, Eric;Barnes, Ashley;Ginsburg, Adam;Kauffmann, Jens
• 通讯作者: Kauffmann, Jens