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S. Koyama

75 papers hereh-index 3111.7k citations108 works total

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

author position
  • first author3
  • middle author34
  • last author3

Across the 40 of 75 papers where every author was matched, so the position is known.

fields
  • astro-ph.HE44
  • astro-ph.GA16
  • astro-ph.IM13
  • gr-qc2
same name
  • S. Koyama — 32 papers, h 23
  • S. Koyama — 16 papers, h 13
  • S. Koyama — 15 papers, h 9
  • S. Koyama — 9 papers, h 14
  • S. Koyama — 9 papers, h 4
  • S. Koyama — 8 papers, h 3

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

activity
20122026
most citedFirst Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

1.9k citations · 14.4k across the 74 of their papers we have counts for

collaborators
Showing 2015Show all

3 papers · 1 filter

astro-ph.HE2015

The off-axis jet structure in Mrk 501 at mm-wavelengths

Shoko Koyama, Motoki Kino, Marcello Giroletti +10

We present results from 43 GHz (VLBA, six epochs from 2012.2 to 2013.2) and 86 GHz (GMVA, one epoch in 2012.4) observations toward the basis of the jet in the TeV Blazar Mrk 501. T…

astro-ph.HE2015★ 1 cited

X-ray measurement of electron and magnetic-field energy densities in the west lobe of the giant radio galaxy 3C 236

Naoki Isobe, Shoko Koyama

X-ray emission associated with the west lobe of the giant radio galaxy, 3C 236, was investigated with the Suzaku observatory, to evaluate the energetics in the lobe. After removing…

astro-ph.HE2015★ 6 cited

Probing Precise Location of Radio Core in TeV Blazar Mrk 501 with VERA at 43 GHz

S. Koyama, M. Kino, A. Doi +13

We investigate the position of the radio core in a blazar by multi-epoch astrometric observations at 43 GHz. Using the VLBI Exploration of Radio Astrometry (VERA), we have conducte…

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