The Intracluster Mass Function from Brown Dwarfs to Stellar-Mass Black Holes from the Microlensing Fluctuations of an Extremely Magnified Star

极度放大恒星微透镜涨落中从褐矮星到恒星质量黑洞的星团内质量函数

• 批准号: 1908823
• 负责人: Patrick Kelly
• 金额: $ 43.22万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1908823&HistoricalAwards=false
• 关键词: Intracluster; Mass; Function; Brown; Dwarfs

This project will take advantage of the gravitational bending of light to observe a very distant galaxy whose image is being magnified by the gravity of a cluster of galaxies in the foreground. By carefully studying the magnification of the distant galaxy they will learn about the mass distribution in the foreground cluster. This galaxy is unique because one star in that galaxy has been magnified enough to be seen at a distance of billions of lightyears. By observing changes in brightness of this star, they will learn about the masses of stars in the foreground cluster of galaxies. The project will also develop several exhibits for he Bell Museum at the University of Minnesota-Twin Cities.The project will compare different lens mass models with the surface brightness spatial variations across the lensed galaxy images to determine the most accurate mass distribution map of the lensing cluster. By obtaining a 3-year light curve for the single, highly magnified star, using the Large Binocular Telescope, they will be able to measure microlensing light fluctuations that can be used to constrain the mass function of the intracluster stars in the foreground cluster. This will help place constraints on the initial mass function.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.

该项目将利用光的引力弯曲来观察一个非常遥远的星系，其图像被前景中星系团的引力放大。通过仔细研究遥远星系的放大率，他们将了解前景星系团的质量分布。这个星系是独一无二的，因为该星系中的一颗星星被放大到足以在数十亿光年的距离被看到。通过观察这颗星星亮度的变化，他们将了解前景星系团中恒星的质量。该项目还将为明尼苏达大学双城分校的贝尔博物馆开发几个展品，该项目将比较不同的透镜质量模型和透镜星系图像的表面亮度空间变化，以确定透镜星系团最准确的质量分布图。通过使用大型双筒望远镜获得单个高度放大的星星的3年光变曲线，他们将能够测量微透镜光波动，这些微透镜光波动可用于限制前景星团中星团内恒星的质量函数。这个奖项反映了NSF的法定使命，并被认为是值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估的支持。

项目成果

Constraints on the Hubble constant from supernova Refsdal’s reappearance

超新星雷夫斯达尔再现对哈勃常数的限制

• DOI: 10.1126/science.abh1322
• 发表时间: 2023
• 期刊: Science
• 影响因子: 56.9
• 作者: Kelly, Patrick L.;Rodney, Steven;Treu, Tommaso;Oguri, Masamune;Chen, Wenlei;Zitrin, Adi;Birrer, Simon;Bonvin, Vivien;Dessart, Luc;Diego, Jose M.
• 通讯作者: Diego, Jose M.

BUFFALO/Flashlights: Constraints on the abundance of lensed supergiant stars in the Spock galaxy at redshift 1

BUFFALO/手电筒：红移 1 处斯波克星系中透镜状超巨星丰度的限制

• DOI: 10.1051/0004-6361/202346761
• 发表时间: 2024
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Diego, Jose M.;Li, Sung Kei;Meena, Ashish K.;Niemiec, Anna;Acebron, Ana;Jauzac, Mathilde;Struble, Mitchell F.;Amruth, Alfred;Broadhurst, Tom J.;Cerny, Catherine
• 通讯作者: Cerny, Catherine

Shock cooling of a red-supergiant supernova at redshift 3 in lensed images

• DOI: 10.1038/s41586-022-05252-5
• 发表时间: 2022-11
• 期刊: Nature
• 影响因子: 64.8
• 作者: Wenlei Chen;P. Kelly;M. Oguri;T. Broadhurst;J. Diego;N. Emami;A. Filippenko;T. Treu;A. Zitrin-A

Cosmological constraints from gas mass fractions of massive, relaxed galaxy clusters

来自大质量松弛星系团气体质量分数的宇宙学约束

• DOI: 10.1093/mnras/stab3390
• 发表时间: 2021
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Mantz, Adam B.;Morris, R. Glenn;Allen, Steven W.;Canning, Rebecca E. A.;Baumont, Lucie;Benson, Bradford;Bleem, Lindsey E.;Ehlert, Steven R.;Floyd, Benjamin;Herbonnet, Ricardo
• 通讯作者: Herbonnet, Ricardo

The Magnificent Five Images of Supernova Refsdal: Time Delay and Magnification Measurements

超新星雷夫斯达尔的壮丽五幅图像：时间延迟和放大倍率测量

• DOI: 10.3847/1538-4357/ac4ccb
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Kelly, Patrick L.;Rodney, Steven;Treu, Tommaso;Birrer, Simon;Bonvin, Vivien;Dessart, Luc;Foley, Ryan J.;Filippenko, Alexei V.;Gilman, Daniel;Jha, Saurabh
• 通讯作者: Jha, Saurabh