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researcher

S. Koyama

32 papers hereh-index 232.7k citations62 works total

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

author position
  • first author3
  • middle author16

Across the 19 of 32 papers where every author was matched, so the position is known.

fields
  • astro-ph.HE17
  • astro-ph.GA10
  • astro-ph.IM4
  • astro-ph.CO1
same name
  • S. Koyama — 75 papers, h 31
  • 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
20112023
most citedThe Quiescent Intracluster Medium in the Core of the Perseus Cluster

500 citations · 1.7k across the 32 of their papers we have counts for

collaborators
Showing 2023Show all

2 papers · 1 filter

astro-ph.GA2023

AGN number fraction in galaxy groups and clusters at z < 1.4 from the Subaru Hyper Suprime-Cam survey

Aoi Hashiguchi, Yoshiki Toba, Naomi Ota +20

One of the key questions on active galactic nuclei (AGN) in galaxy clusters is how AGN could affect the formation and evolution of member galaxies and galaxy clusters in the histor…

astro-ph.HE2023★ 8 cited

SN 2020uem: A Possible Thermonuclear Explosion within A Dense Circumstellar Medium (I) The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy

Kohki Uno, Keiichi Maeda, Takashi Nagao +18

We have performed intensive follow-up observations of a Type IIn/Ia-CSM SN (SN IIn/Ia-CSM), 2020uem, with photometry, spectroscopy, and polarimetry. In this paper, we report on the…

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