Weak-gravitational lensing analysis of subhalos in galaxy clusters for revealing its mass function and statistical properties

• Project/Area Number: 26800097
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Hiroshima University
• Principal Investigator: Okabe Nobuhiro 広島大学, 理学研究科, 助教 (00436073)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 光赤外天文学 / 弱い重力レンズ効果 / 銀河団 / 暗黒物質 / 宇宙論 / X線天文学 / 光赤外線天文学 / 光学赤外線天文学

Outline of Final Research Achievements

Galaxy clusters are the largest object in the universe. High mass density and clumpy structure, namely subhalos, exist in galaxy clusters. The subhalo masses can be measured by weak-gravitational lensing analysis, and physical properties for hot gas in clusters are by X-ray observations. Our studies based on this funding reveals the following main results. 1) X-ray follow-up observation discovered hot gas associated with subhalos previously discovered by weak-lensing analysis and found a stripping feature. 2) Mass profile for dark subhalo associated with a giant, central elliptical galaxy and the entire region are measured by joint weak-lensing and stellar kinematics analysis. 3) Giant synchrotron radio emission traces the projected mass distribution for one merging cluster.

Research Products

• [Int'l Joint Research] University of Birmingham(英国)
• [Int'l Joint Research] Degli studi di Roma Tor Vergata(Italy)
• [Int'l Joint Research] Univ. of Arizona(米国)
• [Int'l Joint Research] ASIAA(Tiawan)
• [Int'l Joint Research] Univ. of Bonn(Germany)
• [Int'l Joint Research]
• [Int'l Joint Research] University of Birmingham/Durham University(英国)
• [Int'l Joint Research] degli Studi di Roma `Tor Vergata'(Italy)
• [Int'l Joint Research] University of Victoria(Canada)
• [Int'l Joint Research] University of Arizona/The Johns Hopkins University/University of Michigan(米国)
• [Int'l Joint Research] Max-Planck-Institut Astrophysik,/University Bonn(Germany)
• [Int'l Joint Research]
• [Journal Article] LoCuSS: Weak-lensing mass calibration of galaxy clusters (2016)
  • Author(s): Nobuhiro Okabe and Graham P. Smith
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 461 Issue: 4 Pages: 3794-3821
  • DOI: 10.1093/mnras/stw1539
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] LoCuSS: exploring the selection of faint blue background galaxies for cluster weak-lensing (2016)
  • Author(s): Ziparo, Felicia; Smith, Graham P.; Okabe, Nobuhiro; Haines, Chris P.; Pereira, Maria J.; Egami, Eiichi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 463 Issue: 4 Pages: 4004-4018
  • DOI: 10.1093/mnras/stw2192
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] X-ray observations of a subhalo associated with the NGC 4839 group infalling toward the Coma cluster (2016)
  • Author(s): Toru SASAKI, Kyoko MATSUSHITA, Kosuke SATO, and Nobuhiro OKABE
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 5 Pages: 1-15
  • DOI: 10.1093/pasj/psw078
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] BUDHIES - III: the fate of H I and the quenching of galaxies in evolving environments (2016)
  • Author(s): Jaffe, Yara L.; Verheijen, Marc A. W.; Haines, Chris P.; Yoon, Hyein; Cybulski, Ryan; Montero-Castano, Maria; Smith, Rory; Chung, Aeree; Deshev, Boris Z.; Fernandez, Ximena; van Gorkom, Jacqueline; Poggianti, Bianca M.; Yun, Min S.; Finoguenov, Alexis; Smith, Graham P.; Okabe, Nobuhiro
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 461 Issue: 2 Pages: 1202-1221
  • DOI: 10.1093/mnras/stw984
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Central Mass Profiles of the Nearby Cool-core Galaxy Clusters Hydra A and A478 (2016)
  • Author(s): N. Okabe, K. Umetsu, T. Tamura, Y. Fujita, M. Takizawa, K. Matsushita, Y. Fukazawa, T. Futamase, M. Kawaharada, S. Miyazaki, Y. Mochizuki, K. Nakazawa, T. Ohashi, N. Ota, T. Sasaki, K. Sato, & S. I. Tam
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 456 Issue: 4 Pages: 4475-4487
  • DOI: 10.1093/mnras/stv2916
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] LoCuSS: Testing hydrostatic equilibrium in galaxy clusters (2016)
  • Author(s): G.P. Smith, P. Mazzotta, N. Okabe, F. Ziparo, S.L. Mulroy, A. Babul, A. Finoguenov, I.G. McCarthu, H. Bourdin, A.E. Evard, T. Futamase, C.P. Haines, M. Jauzac, D.P. Marrone, R. Martin, P.E. May
  • Journal Title: Monthly Notrices of Royal Astronomical Society Volume: 2016 Issue: 1 Pages: L74-L78
  • DOI: 10.1093/mnrasl/slv175
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three-dimensional Multi-probe Analysis of the Galaxy Cluster A1689 (2015)
  • Author(s): Umetsu, Keiichi; Sereno, Mauro; Medezinski, Elinor; Nonino, Mario; Mroczkowski, Tony; Diego, Jose M.; Ettori, Stefano; Okabe, Nobuhiro; Broadhurst, Tom; Lemze, Doron
  • Journal Title: The Astrophysical Journal Volume: 806, Issue 2 Issue: 2 Pages: 207-207
  • DOI: 10.1088/0004-637x/806/2/207
  • NAID: 120006554909
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Detection of universality of dark matter profile from Subaru weak lensing measurements of 50 massive clusters (2015)
  • Author(s): H. Niikura, M. Takada et al.
  • Journal Title: Publ. Atron. Soc. Japan Volume: 67 Issue: 6
  • DOI: 10.1093/pasj/psv090
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Suzaku Observations of Subhalos in the Coma Cluster (2015)
  • Author(s): Sasaki, Toru; Matsushita, Kyoko; Sato, Kosuke; Okabe, Nobuhiro
  • Journal Title: The Astrophysical Journal Volume: 806, Issue 1 Issue: 1 Pages: 123-123
  • DOI: 10.1088/0004-637x/806/1/123
  • NAID: 120006554908
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] LoCuSS: The Slow Quenching of Star Formation in Cluster Galaxies and the Need for Pre-processing (2015)
  • Author(s): Haines, C. P.; Pereira, M. J.; Smith, G. P.; Egami, E.; Babul, A.; Finoguenov, A.; Ziparo, F.; McGee, S. L.; Rawle, T. D.; Okabe, N.; Moran, S. M.
  • Journal Title: The Astrophysical Journal Volume: 806,Issue 1 Issue: 1 Pages: 101-101
  • DOI: 10.1088/0004-637x/806/1/101
  • NAID: 120006554907
  • Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Testing a generalized cubic Galileon gravity model with the Coma Cluster (2015)
  • Author(s): Ayumu Terukina, Kazuhiro Yamamoto, Nobuhiro Okabe, Kyoko Matsushita, Toru Sasaki
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: Issue 10 Issue: 10 Pages: 064-064
  • DOI: 10.1088/1475-7516/2015/10/064
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Frontier Fields: Subaru Weak-Lensing Analysis of the Merging Galaxy Cluster A2744 (2015)
  • Author(s): Medezinski, Elinor; Umetsu, Keiichi; Okabe, Nobuhiro; Nonino, Mario; Molnar, Sandor; Massey, Richard; Dupke, Renato; Merten, Julian
  • Journal Title: The Astrophysical Journal Volume: 817,Issue 1 Issue: 1 Pages: 24-24
  • DOI: 10.3847/0004-637x/817/1/24
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Radio Relics Tracing the Projected Mass Distribution in CIZA J2242.8+5301 (2015)
  • Author(s): N. Okabe, H. Akamatsu, J. Kakuwa, Y. Fujita, Y.-Y. Zhang, M. Tanaka, & K. Umetsu
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Issue: 6 Pages: 114-114
  • DOI: 10.1093/pasj/psv085
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Universal profiles of the intracluster medium from Suzaku X-ray and Subaru weak-lensing observations (2014)
  • Author(s): N. Okabe, K. Uetsu, T. Tamura, Y. Fujita, M. Takizawa, Y.-Y. Zhang, K. Matsushita, T. Hamana, Y. Fukazawa, Yasushi, T. Futamase, M. Kawaharada, S. Miyazaki, Y. Mochizuki, K. Nakazawa, T. Ohashi, N. Ota, T. Sasaki, K. Sato, S. Tam
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 66 Issue: 5 Pages: 99-99
  • DOI: 10.1093/pasj/psu075
  • Peer Reviewed / Open Access
• [Journal Article] Star formation in the massive cluster merger Abell 2744 (2014)
  • Author(s): Rawle, T. D.; Altieri, B.; Egami, E.; Perez-Gonzalez,P. G.; Richard, J.; Santos, J. S.; Valtchanov, I.; Walth, G.; Bouy, H.; Haines, C. P.; Okabe, N.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 442,Issue 1 Issue: 1 Pages: 196-206
  • DOI: 10.1093/mnras/stu868
  • Peer Reviewed
• [Journal Article] LoCuSS: hydrostatic mass measurements of the high-LX cluster sample - cross-calibration of Chandra and XMM-Newton (2014)
  • Author(s): Martino, Rossella; Mazzotta, Pasquale; Bourdin, Herve; Smith, Graham P.; Bartalucci, Iacopo; Marrone, Daniel P.; Finoguenov, Alexis; Okabe, Nobuhiro
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 443,Issue 3 Issue: 3 Pages: 2342-2360
  • DOI: 10.1093/mnras/stu1267
  • Peer Reviewed
• [Journal Article] LoCuSS: the near-infrared luminosity and weak-lensing mass scaling relation of galaxy clusters (2014)
  • Author(s): Mulroy, Sarah L.; Smith, Graham P.; Haines, Chris P.; Marrone, Daniel P.; Okabe, Nobuhiro; Pereira, Maria J.; Egami, Eiichi; Babul, Arif; Finoguenov, Alexis; Martino, Rossella
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 443,Issue 4, Issue: 4 Pages: 3309-3317
  • DOI: 10.1093/mnras/stu1387
  • Peer Reviewed
• [Journal Article] Shapley Supercluster Survey: Galaxy evolution from filaments to cluster cores (2014)
  • Author(s): Merluzzi, P.; Busarello, G.; Haines, C. P.; Mercurio, A.; Okabe, N.; Pimbblet, K. J.; Dopita, M. A.; Grado, A.; Limatola, L.; Bourdin, H.; Mazzotta, P.; Capaccioli, M.; Napolitano, N. R.; Schipani, P.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 446,Issue 1 Issue: 1 Pages: 803-822
  • DOI: 10.1093/mnras/stu2085
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Can we use Weak Lensing to Measure Total Mass Profiles of Galaxies on 20 kiloparsec Scales? (2014)
  • Author(s): Kobayashi, Masato I. N.; Leauthaud, Alexie; More, Surhud; Okabe, Nobuhiro; Laigle, Clotilde; Rhodes, Jason; Takeuchi, Tsutomu T.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 449,Issue 2 Issue: 2 Pages: 2128-2143
  • DOI: 10.1093/mnras/stv424
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Subaru/HSCサーベイ領域にある重量級銀河団のX線観測による質量推定 II (2017)
  • Author(s): 宮岡敬太、岡部信広、北口貴雄、深沢泰司 、大栗真宗、HSC Cluster Members
  • Organizer: 日本天文学会 2017年 春季年会
  • Place of Presentation: 九州大学、日本
• [Presentation] NECSUS : Subaru/HSC Weak-lensing Analysis of Very Nearby Galaxy Clusters (2016)
  • Author(s): Nobuhiro Okabe
  • Organizer: The 6th Subaru International Conference, "Panoramas of the Evolving Cosmos"
  • Place of Presentation: Hiroshima, Japan
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] X-ray mass measurement of massive galaxy clusters in the HSC SSP survey region (2016)
  • Author(s): Keita Miyaoka, Nobuhiro Okabe, Takao Kitaguchi, Yasushi Fukazawa, Masamune Oguri and HSC Cluster members
  • Organizer: The 6th Subaru International Conference, "Panoramas of the Evolving Cosmos"
  • Place of Presentation: Hiroshima, Japan
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] LoCuSS & NECSUS : Cluster Weak-lensing Studies (2016)
  • Author(s): 岡部信広
  • Organizer: 第５回観測的宇宙論ワークショップ
  • Place of Presentation: 広島大学、日本
  • Year and Date: 2016-11-24
  • Invited
• [Presentation] LoCuSS: Weak-lensing mass calibration of galaxy clusters (2016)
  • Author(s): 岡部信広 & G.P. Smith
  • Organizer: 日本天文学会 2016年 秋季年会
  • Place of Presentation: 愛媛大学、日本
  • Year and Date: 2016-09-14
• [Presentation] Subaru/HSCサーベイ領域にある重量級銀河団のX線観測による質量推定 (2016)
  • Author(s): 宮岡敬太、岡部信広、北口貴雄、深沢泰司 、大栗真宗、HSC Cluster Members
  • Organizer: 日本天文学会 2016年 秋季年会
  • Place of Presentation: 愛媛大学、日本
  • Year and Date: 2016-09-14
• [Presentation] Joint X-ray and Subaru/HSC Weak-lensing Analysis of Very Nearby Galaxy Clusters (2016)
  • Author(s): Nobuhiro Okabe
  • Organizer: Hot spots in the XMM sky: Cosmology from X-ray to Radio
  • Place of Presentation: Mykonos Island, Greece
  • Year and Date: 2016-06-15
  • Int'l Joint Research
• [Presentation] Subaru Weak-lensing Mass Measurements for Galaxy Clusters (2015)
  • Author(s): Nobuhiro Okabe
  • Organizer: Astroparticle View of Galaxy Clusters
  • Place of Presentation: Hiroshima Univ., Japan.
  • Year and Date: 2015-03-24 – 2015-03-26
  • Invited
• [Presentation] A Comparison of Weak-lensing and X-ray masses of Galaxy Clusters (2014)
  • Author(s): Nobuhiro Okabe
  • Organizer: The X-ray Universe 2014
  • Place of Presentation: Trinity College Dublin, Ireland
  • Year and Date: 2014-06-16 – 2014-06-19
  • Invited
• [Remarks] Nobuhiro Okabe's Homepage
  • URL: http://theo.phys.sci.hiroshima-u.ac.jp/~okabe/
• [Remarks] Nobuhiro Okabe's Homepage
  • URL: http://theo.phys.sci.hiroshima-u.ac.jp/~okabe/pub-e.html
• [Remarks] Nobuhiro Okabe:publication
  • URL: http://theo.phys.sci.hiroshima-u.ac.jp/~okabe/pub-e.html
• [Remarks] "The X-ray Universe 2014" Symposium
  • URL: http://xrayuniverse.esa.int/
• [Remarks] Astroparticle View of Galaxy Clusters
  • URL: http://www-heaf.hepl.hiroshima-u.ac.jp/cluster1503/