Next-Generation Supernova Cosmology

下一代超新星宇宙学

• 批准号: 1815935
• 负责人: Ryan Foley
• 金额: $ 49.6万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1815935&HistoricalAwards=false
• 关键词: Next; Generation; Supernova; Cosmology

Type Ia supernovae (SNe Ia) are an excellent cosmological probe, and observations of SNe Ia are particularly good at constraining the current cosmic expansion rate and the nature of dark energy. This project will address the following questions: What is the expansion history of the Universe and what is driving the accelerated expansion? Is "dark energy" a cosmological constant, something more exotic, or do we need to re-evaluate our model of gravity? Is the "tension" between local and distant measurements of the Hubble constant caused by systematic errors, or does it point to new physics? As part of this research, training will be provided to several graduate students and 12 community-college students in observational techniques. Outreach will be undertaken through public lectures and the press, and the principle investigator will work with underrepresented students to transition from two-year colleges to four-year programs. The team will perform two low-redshift SNe Ia surveys to (1) reduce the largest source of systematic uncertainty in SN cosmology, the photometric calibration of the low-redshift SN sample, (2) further reduce other systematics related to dust reddening and SN physics, (3) cross-calibrate two of the world's best photometric systems on which 1250 cosmologically useful low-redshift SNe Ia will be observed, (4) produce the first sample of SNe Ia ranging from 0 z 0.8 observed with a single telescopic system, (5) obtain spectra of hundreds of SNe Ia, (6) examine potential distance improvements using spectral data, and (7) produce the tightest constraints on the nature of dark energy and current expansion rate of the Universe.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.

Ia型超新星（SNe Ia）是一个很好的宇宙学探测器，对SNe Ia的观测特别适合于限制当前的宇宙膨胀率和暗能量的性质。该项目将解决以下问题：宇宙的膨胀历史是什么，是什么推动了加速膨胀？“暗能量”是一个宇宙常数，更奇特的东西，还是我们需要重新评估我们的引力模型？哈勃常数的本地和远程测量之间的“张力”是由系统误差引起的，还是指向新的物理学？ 作为这项研究的一部分，将向几名研究生和12名社区学院学生提供观察技术方面的培训。 将通过公开讲座和新闻媒体进行宣传，主要调查员将与代表性不足的学生合作，从两年制大学过渡到四年制课程。 该团队将进行两次低红移超新星Ia巡天，以（1）减少SN宇宙学中系统不确定性的最大来源，即低红移SN样本的光度校准，（2）进一步减少与尘埃红化和SN物理学相关的其他系统，（3）交叉校准两个世界上最好的光度系统，在这些系统上将观测到1250个宇宙学有用的低红移超新星Ia，（4）产生用单个望远镜系统观测到的范围从0到0.8的Ia型超新星的第一个样本，（5）获得数百个Ia型超新星的光谱，（6）使用光谱数据检查潜在的距离改进，（七）对暗能量的性质和宇宙目前的膨胀率产生最严格的限制。这个奖项反映了NSF的法定使命，并被认为是值得的。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来提供支持。

项目成果

First cosmological results using Type Ia supernovae from the Dark Energy Survey: measurement of the Hubble constant

• DOI: 10.1093/mnras/stz978
• 发表时间: 2018-11
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: E. MacAulay;R. Nichol;David Bacon;D. Brout;T. Davis;B. Zhang;B. Bassett;D. Scolnic;A. Moller-A

The Circumstellar Environments of Double-peaked, Calcium-strong Transients 2021gno and 2021inl

• DOI: 10.3847/1538-4357/ac67dc
• 发表时间: 2022-03
• 期刊: The Astrophysical Journal
• 作者: W. Jacobson-Galán;P. Venkatraman;R. Margutti;D. Khatami;G. Terreran;R. Foley;R. Angulo;C. Angus;K. Auchettl;P. Blanchard;A. Bobrick;J. Bright;D. Brout;K. Chambers;C. Couch;D. Coulter;K. Clever;K. Davis;T. D. de Boer;L. DeMarchi;S. Dodd;D. Jones;J. Johnson;C. Kilpatrick;N. Khetan;Z. Lai;D. Langeroodi;C.-C. Lin-C.;E. Magnier;D. Milisavljevic;H. Perets;J. Pierel;J. Raymond;S. Rest;A. Rest;R. Ridden-Harper;K. Shen;M. Siebert;C. Smith;Kirsty Taggart;S. Tinyanont;F. Valdes;V. Villar;Q. Wang;S. Yadavalli;Y. Zenati;A. Zenteno

Significant luminosity differences of two twin Type Ia supernovae

两颗孪生 Ia 型超新星的显着光度差异

• DOI: 10.1093/mnras/stz3324
• 发表时间: 2019
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Foley, Ryan J.;Hoffmann, Samantha L.;Macri, Lucas M.;Riess, Adam G.;Brown, Peter J.;Filippenko, Alexei V.;Graham, Melissa L.;Milne, Peter A.
• 通讯作者: Milne, Peter A.

First cosmology results using type Ia supernovae from the Dark Energy Survey: the effect of host galaxy properties on supernova luminosity

• DOI: 10.1093/mnras/staa946
• 发表时间: 2020-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: M. Smith;M. Sullivan;P. Wiseman;R. Kessler;D. Scolnic;D. Brout;C. D'Andrea;T. Davis;R. Foley;C. Frohmaier;L. Galbany;R. Gupta;C. Guti'errez;S. Hinton;L. Kelsey;C. Lidman;E. MacAulay;A. Moller;R. Nichol;P. Nugent;A. Palmese;M. Pursiainen;M. Sako;R. Thomas;B. Tucker;D. Carollo;G. Lewis;N. E. Sommer;T. Abbott;M. Aguena;S. Allam;S. Ávila;E. Bertin;S. Bhargava;D. Brooks;E. Buckley-Geer;D. Burke;A. Rosell;M. Kind;M. Costanzi;L. Costa;J. Vicente;S. Desai;H. Diehl;P. Doel;T. Eifler;S. Everett;B. Flaugher;P. Fosalba;J. Frieman;J. Garc'ia-Bellido;E. Gaztañaga;K. Glazebrook;D. Gruen;R. Gruendl;J. Gschwend;G. Gutiérrez;W. Hartley;D. Hollowood;K. Honscheid;D. James;E. Krause;K. Kuehn;N. Kuropatkin;M. Lima;N. MacCrann;M. Maia;J. Marshall;P. Martini;Peter Melchior;F. Menanteau;R. Miquel;F. Paz-Chinch'on;A. Plazas;A. Romer;A. Roodman;E. Rykoff;E. Sánchez;V. Scarpine;M. Schubnell;S. Serrano;I. Sevilla-Noarbe;E. Suchyta;M. Swanson;G. Tarlé;D. Thomas;D. Tucker;T. Varga;A. R. W. T. D. E. S. Collaboration

SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances

• DOI: 10.3847/1538-4357/ac30d8
• 发表时间: 2021-04
• 期刊: The Astrophysical Journal
• 作者: W. Kenworthy;D. Jones;M. Dai;R. Kessler;D. Scolnic;D. Brout;M. Siebert;J. Pierel;K. Dettman-K.-Det