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，其图像被前景星系团的引力放大。通过仔细研究遥远星系的放大倍数，他们将了解前景星团的质量分布。这个星系是独一无二的，因为该星系中的一颗恒星已经被放大到足以在数十亿光年的距离处看到。通过观察这颗恒星的亮度变化，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与透镜星系图像的表面亮度空间变化，以确定最准确的透镜质量分布图簇。通过使用大型双筒望远镜获得单颗高放大恒星的 3 年光变曲线，他们将能够测量微透镜光波动，从而可用于约束前景星团中星团内恒星的质量函数。这将有助于对最初的群众职能施加限制。该奖项反映了 NSF 的法定使命，并且通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

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: 2023-05
• 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;et al
• 通讯作者: et al

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: 2021-11
• 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;et al
• 通讯作者: et al

A magnified compact galaxy at redshift 9.51 with strong nebular emission lines

红移 9.51 的放大致密星系，具有强星云发射线

• DOI: 10.1126/science.adf5307
• 发表时间: 2022-10-27
• 期刊: Science
• 影响因子: 56.9
• 作者: H. Williams;P. Kelly;Wenlei Chen;G. Brammer;A. Zitrin;T. Treu;C. Scarlata;A. Koekemoer;M. Oguri;Yu;J. Diego;M. Nonino;J. Hjorth;D. Langeroodi;T. Broadhurst;N. Rogers;I. Pérez;R. Foley;S. Jha;A. Filippenko;L. Strolger;J. Pierel;F. Poidevin;Lilan Yang
• 通讯作者: Lilan Yang

JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results

JWST 珍珠。

• DOI: 10.3847/1538-3881/aca163
• 发表时间: 2022-12
• 期刊: The Astronomical Journal
• 作者: Windhorst, Rogier A.;Cohen, Seth H.;Jansen, Rolf A.;Summers, Jake;Tompkins, Scott;Conselice, Christopher J.;Driver, Simon P.;Yan, Haojing;Coe, Dan;Frye, Brenda;et al
• 通讯作者: et al

A search for transients in the Reionization Lensing Cluster Survey (RELICS): three new supernovae

在再电离透镜团巡天 (RELICS) 中寻找瞬变：三颗新超新星

• DOI: 10.1093/mnras/stad1238
• 发表时间: 2023-04
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Golubchik, Miriam;Zitrin, Adi;Pierel, Justin;Furtak, Lukas J.;Meena, Ashish K.;Graur, Or;Kelly, Patrick L.;Coe, Dan;Andrade;Asif, Maor;et al
• 通讯作者: et al