{"id":"https://openalex.org/A5076204013","orcid":null,"observed_orcids":[],"display_name":"Fred Schaaf","raw_author_names":["F. Schaaf","Fred Schaaf","Fred Shaaf","Schaaf, Fred"],"full_name":"Fred Schaaf","works_count":719,"cited_by_count":29,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":2,"i10_index":0},"ids":{"openalex":"https://openalex.org/A5076204013","orcid":null,"observed_orcids":[]},"affiliations":[],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T12836","display_name":"History and Developments in Astronomy","count":623,"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/T10039","display_name":"Stellar, planetary, and galactic studies","count":519,"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/T12917","display_name":"Astronomy and Astrophysical Research","count":260,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"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/T13175","display_name":"Historical Astronomy and Related Studies","count":234,"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/T10325","display_name":"Astro and Planetary Science","count":201,"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/T13175","display_name":"Historical Astronomy and Related Studies","value":0.0018997,"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/T12836","display_name":"History and Developments in Astronomy","value":0.0014234,"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/T11963","display_name":"Impact of Light on Environment and Health","value":0.0007299,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12917","display_name":"Astronomy and Astrophysical Research","value":0.0004403,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"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/T10039","display_name":"Stellar, planetary, and galactic studies","value":0.0004402,"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":"87355193","wikidata":"https://www.wikidata.org/wiki/Q411","display_name":"Astrobiology","score":0.9096543192863464},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.8181923627853394},{"id":"1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","score":0.687758207321167},{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.5561568737030029},{"id":"205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","score":0.4744330942630768}],"counts_by_year":[{"year":1935,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1957,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1979,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1984,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1985,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1989,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1990,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1992,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":34,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":12,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":17,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":31,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":38,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":34,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":33,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":36,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":44,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":41,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":47,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":35,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":39,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":46,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":42,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":22,"oa_works_count":0,"cited_by_count":0},{"year":2013,"works_count":19,"oa_works_count":0,"cited_by_count":2},{"year":2014,"works_count":21,"oa_works_count":0,"cited_by_count":1},{"year":2015,"works_count":23,"oa_works_count":0,"cited_by_count":2},{"year":2016,"works_count":19,"oa_works_count":0,"cited_by_count":2},{"year":2017,"works_count":15,"oa_works_count":0,"cited_by_count":1},{"year":2018,"works_count":17,"oa_works_count":0,"cited_by_count":1},{"year":2019,"works_count":18,"oa_works_count":0,"cited_by_count":0},{"year":2020,"works_count":19,"oa_works_count":0,"cited_by_count":2},{"year":2021,"works_count":3,"oa_works_count":0,"cited_by_count":1},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":1}],"display_name_alternatives":["F. Schaaf","Fred Schaaf","Fred Shaaf","Schaaf, Fred"],"block_key":"f schaaf","works_api_url":"https://api.openalex.org/works?filter=author.id:A5076204013","updated_date":"2026-11-01T11:00:13","created_date":"2016-06-24T00:00:00"}