{"id":"https://openalex.org/A5006870599","orcid":null,"observed_orcids":[],"display_name":"Tomotaka Nishikawa","raw_author_names":["Nishikawa, Tomotaka","Tomotaka Nishikawa"],"full_name":"NISHIKAWA, Tomotaka","works_count":2,"cited_by_count":0,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":0,"i10_index":0},"ids":{"openalex":"https://openalex.org/A5006870599","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I60134161","ror":"https://ror.org/04chrp450","display_name":"Nagoya University","country_code":"JP","type":"education","lineage":["https://openalex.org/I60134161"]},"years":[2026,2023]}],"last_known_institutions":[{"id":"https://openalex.org/I60134161","ror":"https://ror.org/04chrp450","display_name":"Nagoya University","country_code":"JP","type":"education","lineage":["https://openalex.org/I60134161"]}],"topics":[{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","count":2,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10818","display_name":"Astrophysics and Cosmic Phenomena","count":2,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11323","display_name":"Gamma-ray bursts and supernovae","count":2,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T11323","display_name":"Gamma-ray bursts and supernovae","value":7.8e-06,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10818","display_name":"Astrophysics and Cosmic Phenomena","value":5.5e-06,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","value":1.4e-06,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.942300021648407},{"id":"111309251","wikidata":"https://www.wikidata.org/wiki/Q11547","display_name":"Cosmic ray","score":0.8453999757766724},{"id":"127592171","wikidata":"https://www.wikidata.org/wiki/Q3937","display_name":"Supernova","score":0.8251707553863525},{"id":"17599544","wikidata":"https://www.wikidata.org/wiki/Q22247","display_name":"Gamma-ray burst","score":0.4413301646709442},{"id":"1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","score":0.35428518056869507}],"counts_by_year":[{"year":2023,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":0}],"display_name_alternatives":["Nishikawa, Tomotaka","Tomotaka Nishikawa"],"block_key":"t nishikawa","works_api_url":"https://api.openalex.org/works?filter=author.id:A5006870599","updated_date":"2026-10-15T12:44:11","created_date":"2023-07-28T00:00:00"}