Halo assembly bias systematics in interpreting cosmic acceleration

• Project Area: Why does the Universe accelerate? - Exhaustive study and challenge for the future -
• Project/Area Number: 16H01089
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: MORE Surhud 東京大学, カブリ数物連携宇宙研究機構, 准教授 (00646044)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: Splashback radius / Galaxy cluster / Assembly bias / Optical Astronomy / Theoretical Astronomy / Stimulating / puzzling

Outline of Annual Research Achievements

The main goal of the project was to explore halo assembly bias and the edges of galaxy clusters in observations - called the splashback radius of the galaxy clusters. I have explored systematics with optical galaxy cluster detections after some of the reports of such systematics present in real galaxy cluster catalogs. Since no credible mock galaxy cluster catalogs existed to investigate this, I have worked on making such mock catalogs possible. I have found that due to optical cluster finding systematics, it is quite difficult to establish the presence of halo assembly bias in observations, and such systematics could also plague the inferred locations of the splashback radius. In FY 2017, I have further explored the detection of splashback radius using galaxy cluster samples detected using Xrays (ROSAT) or in the Sunyaev Zeldovich effect (Planck) instead of using the optically selected galaxy clusters. We made use of the PanStarrs galaxy catalog to perform galaxy cluster-galaxy cross-correlations. We have detected the splashback radius of galaxy clusters even when using this sample. We are in the process of comparison of these detected splashback radius with the expectation from cosmological simulations. In FY 2017, I have also worked on the Hyper Suprime Cam Survey weak lensing analysis. I have worked on establishing a pipeline to compute the galaxy galaxy weak lensing signal, to compute covariances for the measurements using mock galaxy catalogs, and establishing systematic requirements for galaxy shear catalogs, as well as estimating photometric redshift biases.

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Carnegie Mellon University/Princeton University/Harvard University(米国)
• [Int'l Joint Research] ETH(Switzerland)
• [Int'l Joint Research] CEA-Saclay/Laboratory of Astrophysics/Laboratory of Astrophysics at Marseille(France)
• [Int'l Joint Research] University of Padova(Italy)
• [Int'l Joint Research] Max Planck Isnsityte for Astrophysics(Germany)
• [Int'l Joint Research]
• [Journal Article] Constraints on the Mass?Richness Relation from the Abundance and Weak Lensing of SDSS Clusters (2018)
  • Author(s): Murata Ryoma、Nishimichi Takahiro、Takada Masahiro、Miyatake Hironao、Shirasaki Masato、More Surhud、Takahashi Ryuichi、Osato Ken
  • Journal Title: The Astrophysical Journal Volume: 854 Issue: 2 Pages: 120-120
  • DOI: 10.3847/1538-4357/aaaab8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A large sample of shear-selected clusters from the Hyper Suprime-Cam Subaru Strategic Program S16A Wide field mass maps (2018)
  • Author(s): Miyazaki Satoshi、Oguri Masamune、Hamana Takashi、Shirasaki Masato、Koike Michitaro、Komiyama Yutaka、Umetsu Keiichi、Utsumi Yousuke、Okabe Nobuhiro、More Surhud、Medezinski Elinor、Lin Yen-Ting、Miyatake Hironao、Murayama Hitoshi、Ota Naomi、Mitsuishi Ikuyuki
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1
  • DOI: 10.1093/pasj/psx120
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First results on the cluster galaxy population from the Subaru Hyper Suprime-Cam survey. II. Faint end color?magnitude diagrams and radial profiles of red and blue galaxies at 0.1?<?z?<?1.1 (2017)
  • Author(s): Nishizawa Atsushi J、Oguri Masamune、Oogi Taira、More Surhud、Nishimichi Takahiro、Nagashima Masahiro、Lin Yen-Ting、Mandelbaum Rachel、Takada Masahiro、Bahcall Neta、Coupon Jean、Huang Song、Jian Hung-Yu、Komiyama Yutaka、Leauthaud Alexie、Lin Lihwai、Miyatake Hironao、Miyazaki Satoshi、Tanaka Masayuki
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-17
  • DOI: 10.1093/pasj/psx106
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The first-year shear catalog of the Subaru Hyper Suprime-Cam Subaru Strategic Program Survey (2017)
  • Author(s): Mandelbaum Rachel、Miyatake Hironao、Hamana Takashi、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-43
  • DOI: 10.1093/pasj/psx130
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Splashback Radius of Halos from Particle Dynamics. II. Dependence on Mass, Accretion Rate, Redshift, and Cosmology (2017)
  • Author(s): Diemer Benedikt、Mansfield Philip、Kravtsov Andrey V.、More Surhud
  • Journal Title: The Astrophysical Journal Volume: 843, Issue 2 Issue: 2 Pages: 140-140
  • DOI: 10.3847/1538-4357/aa79ab
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The FMOS-COSMOS Survey of Star-forming Galaxies at Z ~1.6. V: Properties of Dark Matter Halos Containing Hα Emitting Galaxies (2017)
  • Author(s): Kashino Daichi、More Surhud、Silverman John D.、Daddi Emanuele、Renzini Alvio、Sanders David B.、Rodighiero Giulia、Puglisi Annagrazia、Kajisawa Masaru、Valentino Francesco、Kartaltepe Jeyhan S.、F?vre Olivier Le、Nagao Tohru、Arimoto Nobuo、Sugiyama Naoshi
  • Journal Title: The Astrophysical Journal Volume: 843, Issue 2 Issue: 2 Pages: 138-138
  • DOI: 10.3847/1538-4357/aa789d
  • NAID: 120006352184
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Testing gravity on large scales by combining weak lensing with galaxy clustering using CFHTLenS and BOSS CMASS (2017)
  • Author(s): Alam, S., Miyatake, H., More, S., Ho, S. and Mandelbaum, R.
  • Journal Title: MNRAS Volume: 465 Issue: 4 Pages: 4853-4865
  • DOI: 10.1093/mnras/stw3056
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A new quadruple gravitational lens from the Hyper Suprime-Cam Survey: the puzzle of HSC J115252+004733 (2017)
  • Author(s): More, A., More, S. (8th author in 19 authors) et. al
  • Journal Title: MNRAS Volume: 465 Issue: 2 Pages: 2411-2419
  • DOI: 10.1093/mnras/stw2924
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Interpreting the Strongly Lensed Supernova iPTF16geu: Time Delay Predictions, Microlensing, and Lensing Rates (2017)
  • Author(s): More, A., Suyu, S.H., Ogur, M., More, S. and Lee, C.-H.
  • Journal Title: Astrophysical Journal Letters Volume: 835 Issue: 2 Pages: L25-L25
  • DOI: 10.3847/2041-8213/835/2/l25
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detection of the Splashback Radius and Halo Assembly Bias of Massive Galaxy Clusters (2016)
  • Author(s): S. More, H. Miyatake, M. Takada et al. (13 co-authors)
  • Journal Title: The Astrophysical Journal Volume: 825 Issue: 1 Pages: 39-39
  • DOI: 10.3847/0004-637x/825/1/39
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at z~1.4 (2016)
  • Author(s): T. Okumura, et al. (including R. Takahashi, the 21th in 25 co-authors)
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 3 Pages: 38-38
  • DOI: 10.1093/pasj/psw029
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Strong bimodality in the host halo mass of central galaxies from galaxy-galaxy lensing (2016)
  • Author(s): Mandelbaum, R., Wang, W., Zu, Y., White, S., Henriques, B. and More, S.
  • Journal Title: MNRAS Volume: 457 Issue: 3 Pages: 3200-3218
  • DOI: 10.1093/mnras/stw188
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] EVOLUTION OF STELLAR-TO-HALO MASS RATIO AT z=0-7 IDENTIFIED BY CLUSTERING ANALYSIS WITH THE HUBBLE LEGACY IMAGING AND EARLY SUBARU/HYPER SUPRIME-CAM SURVEY DATA (2016)
  • Author(s): Harikane, Ouchi et al.
  • Journal Title: The Astrophysical Journal Volume: 821 Issue: 2 Pages: 123-145
  • DOI: 10.3847/0004-637x/821/2/123
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Assembly bias and splashback radius on cluster scales: observational status (2017)
  • Author(s): Surhud More
  • Organizer: Quantifying and Understanding the Galaxy-Halo Connection
  • Int'l Joint Research / Invited
• [Presentation] The edges of dark matter halos: theory and observations (2017)
  • Author(s): Surhud More
  • Organizer: Galaxy evolution across cosmic time
  • Int'l Joint Research / Invited
• [Presentation] Splashback radius of galaxy clusters: theory and observations (2017)
  • Author(s): Surhud More
  • Organizer: Conference on Self-interacting dark matter
  • Int'l Joint Research / Invited
• [Presentation] Cosmological constraints from Galaxy clustering and galaxy galaxy lensing (2017)
  • Author(s): Surhud More
  • Organizer: Post-Planck cosmology: Enigma, Challenges and Visions
  • Int'l Joint Research / Invited
• [Presentation] Systematics in photometric redshifts: tests using weak lensing (2017)
  • Author(s): Surhud More
  • Organizer: HSC Weak lensing internal workshop
  • Place of Presentation: Princeton University, Princeton (USA)
  • Int'l Joint Research
• [Presentation] Assembly bias and Splashback radius of Galaxy clusters Conference: From theory to Lensing: Century of Gravitational lensing applications (2016)
  • Author(s): Surhud More
  • Organizer: A Century of Gravitational Lensing: from Theory to Applications
  • Place of Presentation: Leiden University, Leiden（Netherlands）
  • Int'l Joint Research