{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/probing-gravity-with-the-des-cmass-sample-and","title":"Probing gravity with the DES-CMASS sample and BOSS spectroscopy","arxiv_id":"2104.14515","date":"2021-04-29","proceeding":null,"authors":["S. Lee","E. M. Huff","A. Choi","J. Elvin-Poole","C. Hirata","K. Honscheid","N. MacCrann","A. J. Ross","M. A. Troxel","T. F. Eifler","H. Kong","A. Ferté","J. Blazek","D. Huterer","A. Amara","A. Campos","A. Chen","S. Dodelson","P. Lemos","C. D. Leonard","V. Miranda","J. Muir","M. Raveri","L. F. Secco","N. Weaverdyck","J. Zuntz","S. L. Bridle","C. Davis","J. DeRose","M. Gatti","J. Prat","M. M. Rau","S. Samuroff","C. Sánchez","P. Vielzeuf","M. Aguena","S. Allam","A. Amon","F. Andrade-Oliveira","G. M. Bernstein","E. Bertin","D. Brooks","D. L. Burke","A. Carnero Rosell","M. Carrasco Kind","J. Carretero","F. J. Castander","R. Cawthon","C. Conselice","M. Costanzi","L. N. da Costa","M. E. S. Pereira","J. De Vicente","S. Desai","H. T. Diehl","J. P. Dietrich","P. Doel","S. Everett","A. E. Evrard","I. Ferrero","P. Fosalba","J. Frieman","J. García-Bellido","E. Gaztanaga","D. W. Gerdes","T. Giannantonio","D. Gruen","R. A. Gruendl","J. Gschwend","G. Gutierrez","W. G. Hartley","S. R. Hinton","D. L. Hollowood","B. Hoyle","D. J. James","K. Kuehn","N. Kuropatkin","O. Lahav","M. Lima","M. A. G. Maia","M. March","J. L. Marshall","F. Menanteau","R. Miquel","J. J. Mohr","R. Morgan","A. Palmese","F. Paz-Chinchón","A. Pieres","A. A. Plazas Malagón","A. Roodman","E. Sanchez","V. Scarpine","M. Schubnell","S. Serrano","I. Sevilla-Noarbe","E. Sheldon","M. Smith","E. Suchyta","M. E. C. Swanson","G. Tarle","D. Thomas","C. To","T. N. Varga","J. Weller"],"abstract":"The DES-CMASS sample (DMASS) is designed to optimally combine the weak lensing measurements from the Dark Energy Survey (DES) and redshift-space distortions (RSD) probed by the CMASS galaxy sample from the Baryonic Oscillation Spectroscopic Survey (BOSS). In this paper, we demonstrate the feasibility of adopting DMASS as the equivalent of BOSS CMASS for a joint analysis of DES and BOSS in the framework of modified gravity. We utilize the angular clustering of the DMASS galaxies, cosmic shear of the DES METACALIBRATION sources, and cross-correlation of the two as data vectors. By jointly fitting the combination of the data with the RSD measurements from the BOSS CMASS sample and Planck data, we obtain the constraints on modified gravity parameters $\\mu_0 = -0.37^{+0.47}_{-0.45}$ and $\\Sigma_0 = 0.078^{+0.078}_{-0.082}$. We do not detect any significant deviation from General Relativity. Our constraints of modified gravity measured with DMASS are tighter than those with the DES Year 1 redMaGiC galaxy sample with the same external data sets by $29\\%$ for $\\mu_0$ and $21\\%$ for $\\Sigma_0$, and comparable to the published results of the DES Year 1 modified gravity analysis despite this work using fewer external data sets. This improvement is mainly because the galaxy bias parameter is shared and more tightly constrained by both CMASS and DMASS, effectively breaking the degeneracy between the galaxy bias and other cosmological parameters. Such an approach to optimally combine photometric and spectroscopic surveys using a photometric sample equivalent to a spectroscopic sample can be applied to combining future surveys having a limited overlap such as DESI and LSST.","url_abs":"https://arxiv.org/abs/2104.14515v2","url_pdf":"https://arxiv.org/pdf/2104.14515v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"probing-gravity-with-the-des-cmass-sample-and","repo_url":"https://github.com/sujeong-lee/DMASS-analysis-publish","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null},{"paper_slug":"probing-gravity-with-the-des-cmass-sample-and","repo_url":"https://github.com/sujeong-lee/DMASS-analysis-publish2","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null},{"paper_slug":"probing-gravity-with-the-des-cmass-sample-and","repo_url":"https://github.com/sujeong-lee/dmass_analysis","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}