pith. sign in

Katsuji Koyama

Identifiers

  • name variant Katsuji Koyama 0.60 · backfill

Papers (112)

  1. Comment on "An X-ray chimney extending hundreds of parsecs above and below the Galactic Centre" (2019, Nature, 567, 34) astro-ph.GA · 2019 · author #2
  2. X-ray Observation of a Magnetized Hot Gas Outflow in the Galactic Center Region astro-ph.GA · 2019 · author #2
  3. X-ray spectra of Sgr A East and diffuse X-ray background near the Galactic center astro-ph.HE · 2019 · author #6
  4. New Scenario of plasma evolution in IC 443 astro-ph.HE · 2018 · author #5
  5. Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector astro-ph.HE · 2018 · author #75
  6. Origin of the low-temperature plasma in the Galactic center X-ray emission astro-ph.HE · 2018 · author #6
  7. Discovery of recombining plasma from the faintest GeV SNR HB 21 and a possible scenario of the cosmic ray escaping from SNR shocks astro-ph.HE · 2018 · author #7
  8. Hitomi X-ray Observation of the Pulsar Wind Nebula G21.5$-$0.9 astro-ph.HE · 2018 · author #75
  9. Evidence for a neutral iron line generated by MeV protons from supernova remnants interacting with molecular clouds astro-ph.HE · 2018 · author #3
  10. Discovery of 6.4 keV line and soft X-ray emissions from G323.7$-$1.0 with Suzaku astro-ph.HE · 2017 · author #7
  11. Temperature Structure in the Perseus Cluster Core Observed with Hitomi astro-ph.HE · 2017 · author #77
  12. Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi astro-ph.HE · 2017 · author #76
  13. Hitomi Observations of the LMC SNR N132D: Highly Redshifted X-ray Emission from Iron Ejecta astro-ph.HE · 2017 · author #75
  14. Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi astro-ph.HE · 2017 · author #75
  15. Hitomi Observation of Radio Galaxy NGC 1275: The First X-ray Microcalorimeter Spectroscopy of Fe-K{\alpha} Line Emission from an Active Galactic Nucleus astro-ph.HE · 2017 · author #75
  16. Atmospheric gas dynamics in the Perseus cluster observed with Hitomi astro-ph.HE · 2017 · author #78
  17. Measurements of resonant scattering in the Perseus cluster core with Hitomi SXS astro-ph.HE · 2017 · author #74
  18. Diffuse X-Ray Sky in the Galactic Center astro-ph.HE · 2017 · author #1
  19. Search for Thermal X-ray Features from the Crab nebula with Hitomi Soft X-ray Spectrometer astro-ph.HE · 2017 · author #74
  20. Origin of the Galactic Diffuse X-ray Emission: Iron K-shell Line Diagnostics astro-ph.HE · 2017 · author #5
  21. Hitomi constraints on the 3.5 keV line in the Perseus galaxy cluster astro-ph.HE · 2016 · author #85
  22. The Quiescent Intracluster Medium in the Core of the Perseus Cluster astro-ph.GA · 2016 · author #84
  23. Scale heights and equivalent widths of the iron K-shell lines in the Galactic diffuse X-ray emission astro-ph.HE · 2016 · author #5
  24. Search for a Non-equilibrium Plasma in the Merging Galaxy Cluster Abell 754 astro-ph.HE · 2016 · author #6
  25. Suzaku spectra of a Type II Supernova Remnant Kes 79 astro-ph.HE · 2015 · author #2
  26. Number Density Distribution of Near-Infrared Sources on a Sub-Degree Scale in the Galactic Center: Comparison with the Fe XXV Ka Line at 6.7 keV astro-ph.GA · 2015 · author #7
  27. Suzaku study on the Ejecta of the Supernova Remnant G272.2$-$3.2 astro-ph.HE · 2015 · author #2
  28. Evidence for Thermal X-Ray Line Emission from the Synchrotron-Dominated Supernova Remnant RX J1713.7-3946 astro-ph.HE · 2015 · author #6
  29. Kepler's Supernova: An Overluminous Type Ia Event Interacting with a Massive Circumstellar Medium at a Very Late Phase astro-ph.HE · 2015 · author #5
  30. N49: the first robust discovery of a recombining plasma in an extra galactic supernova remnant astro-ph.HE · 2015 · author #2
  31. A Chandrasekhar Mass Progenitor for the Type Ia Supernova Remnant 3C 397 from The Enhanced Abundances of Nickel and Manganese astro-ph.HE · 2015 · author #11
  32. The ASTRO-H X-ray Astronomy Satellite astro-ph.IM · 2014 · author #98
  33. Global Distribution of Ionizing and Recombining Plasmas in the Supernova Remnant G290.1$-$0.8 astro-ph.HE · 2014 · author #2
  34. Discovery of Recombining Plasma in the Supernova Remnant 3C 391 astro-ph.HE · 2014 · author #2
  35. X-ray Filament with a Strong 6.7 keV Line in the Galactic Center Region astro-ph.HE · 2014 · author #6
  36. Discovery of an Overlapping Cluster in Abell 1674 Field with Suzaku astro-ph.HE · 2014 · author #8
  37. Abundances in the Ejecta of Core Collapse Supernova Remnants, G350.1-0.3 and G349.7+0.2 astro-ph.HE · 2014 · author #8
  38. Discovery of Enhanced Radiative Recombination Continua of He-like Iron and Calcium from IC 443 and Its Implications astro-ph.HE · 2014 · author #4
  39. Suzaku Discovery of Fe K-Shell Line from the O-Rich SNR G292.0+1.8 astro-ph.HE · 2014 · author #2
  40. X-Ray Emission from the Galactic Supernova Remnant G12.0-0.1 astro-ph.HE · 2013 · author #3
  41. Suzaku observations of the type 2 QSO in the central galaxy of the Phoenix cluster astro-ph.CO · 2013 · author #5
  42. Thermal and Non-thermal X-Rays from the Galactic Supernova Remnant G348.5+0.1 astro-ph.HE · 2013 · author #4
  43. X-Ray Observation of the Galactic Supernova Remnant G355.6-0.0 with Suzaku astro-ph.HE · 2013 · author #4
  44. Asymmetric Ejecta Distribution in SN 1006 astro-ph.HE · 2013 · author #3
  45. Non-Thermal Radio and Gamma-Ray Emission from a Supernova Remnant by the Blast Wave Breaking Out of the Circumstellar Matter astro-ph.HE · 2013 · author #3
  46. X-ray Echo from the Sagittarius C Complex and 500-year Activity History of Sagittarius A* astro-ph.GA · 2012 · author #5
  47. The ASTRO-H X-ray Observatory astro-ph.IM · 2012 · author #88
  48. The K-shell Line Distribution of Heavy Elements along the Galactic Plane Observed with Suzaku astro-ph.HE · 2012 · author #4
  49. Evidence for Recombining Plasma in the Supernova Remnant G346.6-0.2 astro-ph.HE · 2012 · author #3
  50. Recombining Plasma and Hard X-ray Filament in the Mixed-Morphology Supernova Remnant W44 astro-ph.HE · 2012 · author #2
  51. X-Ray Observations of the Supernova Remnant W28 with Suzaku --- I. Spectral Study of the Recombining Plasma astro-ph.HE · 2012 · author #2
  52. Suzaku View of the Supernova Remnant RCW 86: X-Ray Studies of Newly-Discovered Fe-Rich Ejecta astro-ph.HE · 2012 · author #2
  53. Evolution of Supernova Remnants Expanding out of the Dense Circumstellar Matter into the Rarefied Interstellar Medium astro-ph.HE · 2011 · author #3
  54. New Evidence for High Activity of the Super-Massive Black Hole in our Galaxy astro-ph.HE · 2011 · author #4
  55. Global Distribution of Fe K alpha Lines in the Galactic Center Region Observed with the Suzaku Satellite astro-ph.HE · 2011 · author #4
  56. Suzaku Discovery of Twin Thermal Plasma from the Tornado Nebula astro-ph.HE · 2011 · author #3
  57. No X-Ray Excess from the HESS J1741-302 Region except a New Intermediate Polar Candidate astro-ph.HE · 2011 · author #2
  58. K-shell Emission of Neutral Iron Line from Sgr B2 Excited by Subrelativistic Protons astro-ph.GA · 2011 · author #3
  59. X-Ray Spectrum of a Peculiar Supernova Remnant G359.1-0.5 astro-ph.HE · 2011 · author #2
  60. The ASTRO-H Mission astro-ph.IM · 2010 · author #75
  61. Suzaku Observations of the Great Annihilator and the Surrounding Diffuse Emissions astro-ph.HE · 2010 · author #4
  62. Discovery of K-Shell Emission Lines of Neutral Atoms in the Galactic Center Region astro-ph.HE · 2010 · author #2
  63. Suzaku Discovery of the Strong Radiative Recombination Continuum of Iron from the Supernova Remnant W49B astro-ph.HE · 2009 · author #2
  64. Discovery of Strong Radiative Recombination Continua from The Supernova Remnant IC 443 with Suzaku astro-ph.HE · 2009 · author #3
  65. A Super Bubble Candidate in the Galactic Center and a Local Enhancement G359.77-0.09 astro-ph.HE · 2009 · author #5
  66. An X-Ray Face-on View of the Sgr B Molecular Clouds Observed with Suzaku astro-ph.GA · 2009 · author #2
  67. Suzaku Observation Adjacent to the South End of the Radio Arc astro-ph.GA · 2009 · author #2
  68. A New Supernova Remnant Candidate and an Associated Outflow in the Sagittarius C Region astro-ph.GA · 2009 · author #5
  69. X-Ray Reflection Nebulae with Large Equivalent Widths of Neutral Iron Ka Line in the Sgr C Region astro-ph · 2008 · author #5
  70. New CTI Correction Method for the Spaced-Row Charge Injection of the Suzaku X-Ray Imaging Spectrometer astro-ph · 2008 · author #5
  71. Iron Emission Lines on the Galactic Ridge Observed with Suzaku astro-ph · 2008 · author #4
  72. Energy-Scale Calibration of the Suzaku X-Ray Imaging Spectrometer Using the Checker Flag Charge Injection Technique in Orbit astro-ph · 2008 · author #5
  73. Timing and Spectral Study of AX J1745.6-2901 with Suzaku astro-ph · 2008 · author #6
  74. Suzaku Observation of 30Dor C: A Supernova Remnant with the Largest Non-Thermal Shell astro-ph · 2008 · author #3
  75. Discoveries of 3 K-shell Lines of Iron and a Coherent Pulsation of 593-sec from SAX J1748.2-2808 astro-ph · 2008 · author #2
  76. X-Ray Emission from Supernova Remnants Observed in the ASCA Galactic Plane Survey astro-ph · 2008 · author #3
  77. X-Ray Observations of the Sagittarius D HII Region toward the Galactic Center with Suzaku astro-ph · 2008 · author #3
  78. Spatial Distribution of the Galactic Center Diffuse X-Rays and the Spectra of the Brightest 6.4keV Clumps astro-ph · 2008 · author #1
  79. Time Variability of the Neutral Iron Lines from the Sgr B2 Region and its Implication of a Past Outburst of Sgr A$^*$ astro-ph · 2008 · author #2
  80. Suzaku Spectroscopy of an X-Ray Reflection Nebula and a New Supernova Remnant Candidate in the Sgr B1 Region astro-ph · 2007 · author #8
  81. Suzaku X-Ray Spectroscopy of a Peculiar Hot Star in the Galactic Center Region astro-ph · 2007 · author #3
  82. Spectral Study of the Galactic Ridge X-ray Emission with Suzaku astro-ph · 2007 · author #4
  83. A Time-Variable X-Ray Echo: Indications of a Past Flare of the Galactic-Center Black Hole astro-ph · 2007 · author #1
  84. Suzaku Detection of an Intense X-Ray Flare from an A-type Star HD161084 astro-ph · 2007 · author #6
  85. Development of an n-channel CCD, CCD-NeXT1, for Soft X-ray Imager onboard the NeXT satellite astro-ph · 2007 · author #5
  86. Suzaku Observation of the RCW86 Northeastern Shell astro-ph · 2007 · author #2
  87. Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center astro-ph · 2007 · author #13
  88. Measuring the Broad-band X-Ray Spectrum from 400 eV to 40 keV in the Southwest Part of the Supernova Remnant RX J1713.7-3946 astro-ph · 2007 · author #12
  89. Suzaku Spectroscopy of the Extended X-Ray Emission in M17 astro-ph · 2007 · author #4
  90. X-Ray Spectroscopy of SN 1006 with Suzaku astro-ph · 2007 · author #2
  91. X-ray Spectral Study of the extended emission,'the Cap', located 11.6 kpc above the disk of M82 astro-ph · 2006 · author #5
  92. Discoveries of Diffuse Iron Line Sources from the Sgr B Region astro-ph · 2006 · author #1
  93. New X-ray views of the Galactic center observed with Suzaku astro-ph · 2006 · author #1
  94. Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission astro-ph · 2006 · author #1
  95. Chandra Observation of the Starburst Galaxy NGC 2146 astro-ph · 2004 · author #4
  96. XMM-Newton Observations of G32.45+0.1and G38.55+0.0: diffuse hard X-ray sources found with the ASCA Galactic Plane Survey astro-ph · 2004 · author #3
  97. X-ray Study of the Intermediate-Mass Young Stars Herbig Ae/Be Stars astro-ph · 2004 · author #3
  98. Chandra and ASCA Observations of the X-ray-brightest T-Tauri Stars in the Rho Ophiuchi Cloud astro-ph · 2002 · author #3
  99. Unusual diffuse X-ray source in the Galactic center region astro-ph · 2001 · author #3
  100. Chandra Observations of Embedded Young Stellar Objects astro-ph · 2001 · author #1
  101. X-Ray Observations on the Galactic Center Region astro-ph · 2001 · author #1
  102. X-ray source population of the Galactic center region obtained with ASCA astro-ph · 2001 · author #2
  103. A Diffuse X-Ray Source, AX J1843.8-0352: Association with the Radio Complex G28.6-0.1 and Identification of a New Supernova Remnant astro-ph · 2001 · author #3
  104. Discovery of X rays from Class 0 protostar candidates in OMC-3 astro-ph · 2001 · author #2
  105. ASCA Observations of the Twin Supernova Remnants in the Large Magellanic Cloud, DEM L316 astro-ph · 2000 · author #3
  106. Discovery of Non-Thermal X-Rays from the Shell of RCW86 astro-ph · 2000 · author #2
  107. Broad-Band X-Ray Study of a Transient Pulsar RX J0059.2-7138 astro-ph · 2000 · author #3
  108. Deep X-Ray Observations of Supernova Remnants G359.1-0.5 and G359.0-0.9 with ASCA astro-ph · 2000 · author #4
  109. A Study of the Populations of X-ray Sources in the Small Magellanic Cloud with ASCA astro-ph · 2000 · author #5
  110. Quasi-periodic X-ray Flares from the Protostar YLW15 astro-ph · 1999 · author #3
  111. Rotation and X-ray emission from protostars astro-ph · 1999 · author #4
  112. ICM masses in nearby and distant clusters of galaxies astro-ph · 1997 · author #3

Mentions

  • 1510.06832 #7 · backfill · confidence 0.70 Katsuji Koyama
  • 1510.05265 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1510.04025 #6 · backfill · confidence 0.70 Katsuji Koyama
  • 1506.03135 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 1505.07913 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1502.04255 #11 · backfill · confidence 0.70 Katsuji Koyama
  • 1412.1356 #98 · backfill · confidence 0.70 Katsuji Koyama
  • 1411.6809 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1409.6861 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1409.4520 #6 · backfill · confidence 0.70 Katsuji Koyama
  • 1406.3747 #8 · backfill · confidence 0.70 Katsuji Koyama
  • 1403.6898 #8 · backfill · confidence 0.70 Katsuji Koyama
  • 1403.5850 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1402.1633 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1309.7749 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1309.3672 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 1308.1755 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1306.1026 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1305.4489 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1303.6049 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1211.4529 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 1210.4378 #88 · backfill · confidence 0.70 Katsuji Koyama
  • 1209.0067 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1208.5560 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1208.0113 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1202.3125 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1202.1594 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1110.4948 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1109.1950 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1107.2808 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1107.0821 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1106.2861 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1104.4484 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 1103.0348 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 1010.4972 #75 · backfill · confidence 0.70 Katsuji Koyama
  • 1005.0056 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 1004.3891 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0910.3302 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0909.3848 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 0905.2725 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 0904.4550 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0903.1906 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0902.1308 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 0811.1830 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 0810.0873 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 0810.0317 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 0809.3665 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 0809.1278 #6 · backfill · confidence 0.70 Katsuji Koyama
  • 0808.3501 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 0805.3608 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0805.2232 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 0805.2079 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 0804.3309 #1 · backfill · confidence 0.70 Katsuji Koyama
  • 0803.1528 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0712.0877 #8 · backfill · confidence 0.70 Katsuji Koyama
  • 0712.0280 #3 · backfill · confidence 0.70 Katsuji Koyama
  • 0711.2962 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 0711.2853 #1 · backfill · confidence 0.70 Katsuji Koyama
  • 0711.1201 #6 · backfill · confidence 0.70 Katsuji Koyama
  • 0710.0785 #5 · backfill · confidence 0.70 Katsuji Koyama
  • 0709.3151 #2 · backfill · confidence 0.70 Katsuji Koyama
  • 0709.1580 #13 · backfill · confidence 0.70 Katsuji Koyama
  • 0708.2002 #12 · backfill · confidence 0.70 Katsuji Koyama
  • 0707.4074 #4 · backfill · confidence 0.70 Katsuji Koyama
  • 0706.4146 #2 · backfill · confidence 0.70 Katsuji Koyama

Frequent Coauthors