Theoretical Research on Intergalactic Gas as Dark Baryon

2011 Fiscal Year Final Research Report

• Project/Area Number: 20540235
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: SASAKI Shin 首都大学東京, 理工学研究科, 助教 (80262260)
• Project Period (FY): 2008 – 2011
• Keywords: 理論天文学

Research Abstract

Our bodies and stars consist of baryon(ordinary matter). Recent researches such as anisotropies of cosmic microwave background radiation and type Ia supernovae have revealed how much baryon there are in the universe, but most of it has not been observed yet. We studied the properties of this missing baryon being referred to as dark baryon with numerical simulations and analytic models. We also studied some special astronomical satellites to observe dark baryon.

Research Products

• [Journal Article] Impact of Chandra Calibration Uncertainties on Galaxy Cluster Temperatures : Application to the Hubble Constant (2010)
  • Author(s): E. D. Reese, H. Kawahara, T. Kitayama, N. Ota, S. Sasaki S. Sasaki
  • Journal Title: Astrophysical Journal Volume: vol.721 Pages: 653-669
  • Peer Reviewed
• [Journal Article] X-ray Temperature and Mass Measurements to the Virial Radius of Abell 1413 with Suzaku (2010)
  • Author(s): A. Hoshino, J. P. Henry, K. Sato, H. Akamatsu, W. Yokota, S. Sasaki, Y. Ishisaki, T. Ohashi, M. Bautz, Y. Fukazawa, N. Kawano, A. Furuzawa, K. Hayashida, T. Tawa, J. Hughes, M. Kokubun, and T. Tamura
  • Journal Title: Publication of Astronomical Society of Japan Volume: vol.62 Pages: 371-389
  • Peer Reviewed
• [Journal Article] EDGE : Explorer of diffuse emission and gamma-ray burst explosions (2009)
  • Author(s): L. Piro, J. W. den Herder, T. Ohashi, L. Amati, J. L. Atteia, S. Barthelmy, M. Barbera, D. Barret, S. Basso, M. Boer, S. Borgani, O. Boyarskiy, E. Branchini, G. Branduardi-Raymont, M. Briggs, G. Brunetti, C. Budtz-Jorgensen, D. Burrows, S. Campana, E. Car
  • Journal Title: Experimental Astronomy Volume: vol.23 Pages: 67-89
  • Peer Reviewed
• [Journal Article] Extracting Galaxy Cluster Gas Inhomogeneity from X-ray Surface Brightness : A Statistical Approach and Application to Abell 3667 (2008)
  • Author(s): H. Kawahara, E. Reese, T. Kitayama, S. Sasaki, and Y. Suto
  • Journal Title: Astrophysical Journal Volume: vol.687 Pages: 936-950
  • Peer Reviewed
• [Presentation] Clusters of galaxies as a tool to study cosmology (2011)
  • Author(s): Shin Sasaki
  • Organizer: Workshop on Chemical Evolution of the Universe
  • Place of Presentation: 東京
  • Year and Date: 2011-10-31
• [Presentation] 銀河団ガスの非一様性: Log-normal分布モデル (2008)
  • Author(s): 佐々木伸
  • Organizer: 高エネルギー宇宙物理学研究会
  • Place of Presentation: 京都
  • Year and Date: 2008-11-15