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researcher

K. Koyama

4 papers hereh-index 61k citations15 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author1
  • middle author1

Across the 2 of 4 papers where every author was matched, so the position is known.

fields
  • astro-ph2
  • astro-ph.HE2
same name
  • K. Koyama — 235 papers, h 74
  • K. Koyama — 176 papers, h 53
  • K. Koyama — 14 papers, h 5
  • K. Koyama — 12 papers, h 27
  • K. Koyama — 12 papers, h 3
  • K. Koyama — 11 papers

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

most citedASTRO-H White Paper - Young Supernova Remnants

3 citations · 6 across the 2 of their papers we have counts for

collaborators

4 papers

astro-ph.HE2014★ 3 cited

ASTRO-H White Paper - Plasma Diagnostic and Dynamics of the Galactic Center Region

K. Koyama, J. Kataoka, M. Nobukawa +16

The most characteristic high-energy phenomena in the Galactic center (GC) region is the presence of strong K-shell emission lines from highly ionized Si, S, Ar, Ca, Fe and Ni, whic…

astro-ph.HE2014★ 3 cited

ASTRO-H White Paper - Young Supernova Remnants

J. P. Hughes, S. Safi-Harb, A. Bamba +23

Thanks to the unprecedented spectral resolution and sensitivity of the Soft X-ray Spectrometer (SXS) to soft thermal X-ray emission, ASTRO-H will open a new discovery window for un…

astro-ph1997

A Possible Site of Cosmic Ray Acceleration in the Supernova Remnant IC 443

Jonathan W. Keohane, R. Petre, E. V. Gotthelf +2

We present evidence for shock acceleration of cosmic rays to high energies (about 10 TeV) in the supernova remnant IC 443. X-ray imaging spectroscopy with ASCA reveals two regions…

astro-ph1997

X-Ray Properties of Early Type Galaxies as Observed with ASCA

H. Matsumoto, K. Koyama, H. Awaki +3

We have systematically investigated the ASCA spectra of 12 early type galaxies. This paper presents the global spectral properties of these systems based on a larger sample than in…

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Not affiliated with arXiv. Researcher data from Semantic Scholar (ODC-BY) and OpenAlex.