List of Papers

Towards Detection of Exoplanetary Rings Via Transit Photometry: Methodology and a Possible Candidate

Masataka Aizawa, Sho Uehara, Kento Masuda, Hajime Kawahara, Yasushi Suto AJ accepted, arXiv:1702.08252,

Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic

H. Akamatsu, M. Mizuno, N. Ota, Y.-Y. Zhang, R. J. van Weeren, H. Kawahara, Y. Fukazawa, J. S. Kaastra, M. Kawaharada, K. Nakazawa, T. Ohashi, H.J.A. Röttgering, M. Takizawa, J. Vink, F. Zandanel A&A accepted, arXiv:1612.03058,

Frequency Modulation of Directly Imaged Exoplanets: Geometric Effect as a Probe of Planetary Obliquity

Hajime Kawahara, ApJ 822, 112 (2016), arXiv:1603.02898,

Transiting Planet Candidates Beyond the Snow Line Detected by Visual Inspection of 7557 Kepler Objects of Interest

Sho Uehara, Hajime Kawahara, Kento Masuda, Shin’ya Yamada, Masataka Aizawa, ApJ, 822, 2 (2016), arXiv:1602.07848,

Suzaku Observations of the Galaxy Cluster 1RXS J0603.3+4214: Implications of Particle Acceleration Processes in Toothbrush Radio Relic

  1. Itahana, M. Takizawa, H. Akamatsu, T. Ohashi, Y. Ishisaki, H. Kawahara, R. J. Van Weeren, PASJ 67,113 (2015), arXiv:1508.05845,

Suzaku X-ray study of the double radio relic galaxy cluster CIZA J2242.8+5301

  1. Akamatsu, R. J. van Weeren, G. A. Ogrean, H. Kawahara, A. Stroe, D. Sobral, M. Hoeft, H. Röttgering, M. Brüggen, J. S. Kaastra, A&A 582, A87 (2015) arXiv:1507.02285,

Absolute Dimensions of a Flat Hierarchical Triple System KIC 6543674 from the Kepler Photometry

Kento Masuda, Sho Uehara, Hajime Kawahara, ApJL, 806, L37 (2015), arXiv:1506.01891,

Lifetime and Spectral Evolution of a Magma Ocean with a Steam Atmosphere: Its Detectability by Future direct Imaging

Keiko Hamano, Hajime Kawahara, Yutaka Abe, Masanori Onishi, George L. Hashimoto, ApJ, 806, 216 (2015), arXiv:1505.03552,

Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths

Yuichi Ito, Masahiro Ikoma, Hajime Kawahara, Hiroko Nagahara, Yui Kawashima, and Taishi Nakamoto, ApJ, 801, 144 (2014), arXiv:1501.05393,

Characterizing Earth-like Planets Using a Combination of High-Dispersion Spectroscopy and High-Contrast Instruments: Doppler-shifted Water and Oxygen Lines

Hajime Kawahara, Teruyuki Hirano arXiv:1409.5740,

Spectroscopic Coronagraphy for Planetary Radial Velocimetry of Exoplanets

Hajime Kawahara, Naoshi Murakami, Taro Matsuo, Takayuki Kotani, accepted for publication in ApJS, ApJS, 212, 27 (2014), arXiv:1404.5712, IOP

Exploring Hot Gas at Junctions of Galaxy Filaments with Suzaku

Ikuyuki Mitsuishi, Hajime Kawahara, Norio Sekiya, Shin Sasaki, Thierry Sousbie, Noriko Yamasaki, ApJ, 783, 137 (2014), arXiv:1311.5042, IOP

Starspots - Transit Depth Relation of the Evaporating Planet Candidate KIC 12557548b

Hajime Kawahara, Teruyuki Hirano, Kenji Kurosaki, Yuichi Ito, Masahiro Ikoma, ApJ Letters 776, L6 (2013), arXiv:1308.1585, IOP

Probing the extreme planetary atmosphere of WASP-12b

Mark Swain, Pieter Deroo, Giovanna Tinetti, Morgan Hollis, Marcell Tessenyi, Michael Line, Hajime Kawahara, Yuka Fujii, Adam Showman, Sergey Yurchenko, Icarus 225,432-445 (2013), arXiv:1205.4736, Icarus

Validity of Hydrostatic Equilibrium in Galaxy Clusters from Cosmological Hydrodynamical Simulations

Daichi Suto, Hajime Kawahara, Tetsu Kitayama, Shin Sasaki, Yasushi Suto, Renyue Cen, ApJ, 767, 79 (2013), arXiv:1302.5172

Systematic X-ray Analysis of Radio Relic Clusters with SUZAKU

Hiroki Akamatsu, Hajime Kawahara, PASJ, 65,16 (2013), ADS, PASJ

The Spin Effect on Planetary Radial Velocimetry of Exoplanets

Hajime Kawahara, ApJ Letters 760, L13 (2012), arXiv:1209.0101 , IOP

Can Ground-based Telescopes Detect The Oxygen 1.27 Micron Absorption Feature as a Biomarker in Exoplanets ?

Hajime Kawahara, Taro Matsuo, Michihiro Takami, Yuka Fujii, Takayuki Kotani, Naoshi Murakami, Motohide Tamura, Olivier Guyon, ApJ 758, 13 (2012), arXiv:1206.0558 , IOP

Mapping Earth-analogs from Photometric Variability: Spin-Orbit Tomography for Planets in Inclined Orbits

Yuka Fujii, Hajime Kawahara, ApJ, 755, 101 (2012), arXiv:1204.3504 , IOP

Mapping Clouds and Terrain of Earth-like Planets from Photometric Variability : Demonstration with Planets in Face-on Orbits

Hajime Kawahara, Yuka Fujii, ApJ Letters 739, L62 (2011), arXiv:1106.0136 , IOP

Colors of a Second Earth II: Effects of Clouds on Photometric Characterization of Earth-like Exoplanets

Yuka Fujii, Hajime Kawahara, Yasushi Suto, Satoru Fukuda, Teruyuki Nakajima, Timothy A. Livengood, Edwin L. Turner, ApJ,738,184 (2011), arXiv:1102.3625 , IOP

SUZAKU Observation of a New Merging Group of Galaxies at a Filamentary Junction

Hajime Kawahara, Hiroshi Yoshitake, Takahiro Nishimichi, Thierry Sousbie, ApJ Letters,727,L38 (2011), ADS, IOP

Studying the Warm-Hot Intergalactic Medium in Emission

Yoh Takei, Eugenio Ursino, Enzo Branchini, Takaya Ohashi, Hajime Kawahara, Kazuhisa Mitsuda, Luigi Piro, Alessandra Corsi, Lorenzo Amati, Jan-Willem den Herder, Massimiliano Galeazzi, Jelle Kaastra, Lauro Moscardini, Fabrizio Nicastro, Frits Paerels, Mauro Roncarelli, Matteo Viel, ApJ 734,91 (2011), arXiv:1011.2116 , IOP

The persistent cosmic web and its filamentary structure II: Illustrations

Thierry Sousbie,Christophe Pichon, Hajime Kawahara, MNRAS,414,384 (2011), ADS, MNRAS

Impact of Chandra calibration uncertainties on galaxy cluster temperatures: application to the Hubble Constant

Erik D. Reese, Hajime Kawahara, Tetsu Kitayama, Naomi Ota, Shin Sasaki, Yasushi Suto, ApJ,721,653 (2010), ADS, IOP

Global Mapping of Earth-like Exoplanets from Scattered Light Curves

Hajime Kawahara, Yuka Fujii, ApJ,720,1333 (2010), ADS, IOP

The axis ratio distribution of X-ray clusters observed by XMM-Newton

Hajime Kawahara, ApJ,719,1926 (2010), ADS, IOP

Colors of a Second Earth: Estimating the fractional areas of ocean, land, and vegetation of Earth-like exoplanets

Y. Fujii, H. Kawahara, Y. Suto, A. Taruya, S. Fukuda, T. Nakajima, E. L. Turner, ApJ,715,866 (2010), ADS, IOP

Inhomogeneity in Intracluster Medium and Its Cosmological Implications

Hajime Kawahara, Ph.D. thesis, The University of Tokyo, (2009) zenodo

Extracting Galaxy Cluster Gas Inhomogeneity from X-Ray Surface Brightness: A Statistical Approach and Application to Abell 3667

Hajime Kawahara, Erik D. Reese, Tetsu Kitayama, Shin Sasaki, Yasushi Suto, ApJ,687,936 (2008), ADS, IOP

Systematic Errors in the Hubble Constant Measurement from the Sunyaev-Zel’dovich Effect

Hajime Kawahara, Tetsu Kitayama, Shin Sasaki, Yasushi Suto, ApJ,674,11 (2008), ADS, IOP

X-Ray Study of Temperature and Abundance Profiles of the Cluster of Galaxies Abell 1060 with Suzaku

Kosuke Sato, Noriko Y. Yamasaki, Manabu Ishida, Yoshitaka Ishisaki, Takaya Ohashi, Hajime Kawahara, Takao Kitaguchi, Madoka Kawaharada, Motohide Kokubun, Kazuo Makishima, Naomi Ota, Kazuhiro Nakazawa, Takayuki Tamura, Kyoko Matsushita, Naomi Kawano, Yasushi Fukazawa, John P. Hughes, PASJ, 59,299 (2007), ADS

Radial Profile and Lognormal Fluctuations of the Intracluster Medium as the Origin of Systematic Bias in Spectroscopic Temperature

Hajime Kawahara, Yasushi Suto, Tetsu Kitayama, Shin Sasaki, Mamoru Shimizu, Elena Rasia, Klaus Dolag, ApJ, 659,257 (2007), ADS, IOP

Soft X-Ray Transmission Spectroscopy of a Warm/Hot Intergalactic Medium with XEUS

Hajime Kawahara, Kohji Yoshikawa, Shin Sasaki, Yasushi Suto, Nobuyuki Kawai, Kazuhisa Mitsuda, Takaya Ohashi, Noriko Yamasaki, PASJ,58,657 (2006), ADS