{"id":"https://openalex.org/W29092641","doi":"https://doi.org/10.1086/157339","title":"The structure of NGC 7027","display_name":"The structure of NGC 7027","publication_year":1979,"publication_date":"1979-09-01","ids":{"openalex":"https://openalex.org/W29092641","doi":"https://doi.org/10.1086/157339","mag":"29092641"},"language":"en","primary_location":{"id":"doi:10.1086/157339","doi":"https://doi.org/10.1086/157339","is_oa":false,"landing_page_url":"https://doi.org/10.1086/157339","pdf_url":null,"source":{"id":"https://openalex.org/S1980519","display_name":"The Astrophysical Journal","issn_l":"0004-637X","issn":["0004-637X","1538-4357"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-1","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astrophysical Journal","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5113462083","display_name":"Paul D. Atherton","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"P. D. Atherton","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5068071498","display_name":"Thomas R. Hicks","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"T. R. Hicks","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":null,"display_name":"G. J. Robinson","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"G. J. Robinson","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5068575502","display_name":"J. P. Phillips","orcid":"https://orcid.org/0000-0001-6530-699X","observed_orcids":["https://orcid.org/0000-0001-6530-699X","https://orcid.org/0000-0003-2341-0451"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. P. Phillips","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5035970927","display_name":"Newrick K. Reay","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"N. K. Reay","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5109554712","display_name":"S. P. Worswick","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"S. P. Worswick","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":4499,"currency":"USD","value_usd":4499},"apc_paid":null,"fwci":2.9636,"has_fulltext":false,"cited_by_count":34,"citation_normalized_percentile":{"value":0.89274623,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"232","issue":null,"first_page":"786","last_page":"786"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10477","display_name":"Astrophysics and Star Formation Studies","score":0.4839000105857849,"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"}},"topics":[{"id":"https://openalex.org/T10477","display_name":"Astrophysics and Star Formation Studies","score":0.4839000105857849,"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","score":0.40700000524520874,"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/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.08739999681711197,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/ngc-7027","display_name":"NGC 7027","score":1.0},{"id":"https://openalex.org/keywords/h-ii-regions","display_name":"H II regions","score":0.8209999799728394},{"id":"https://openalex.org/keywords/reflection-nebula","display_name":"reflection nebulae","score":0.9279999732971191},{"id":"https://openalex.org/keywords/nebular-structure","display_name":"nebular structure","score":0.47200000286102295}],"concepts":[{"id":"https://openalex.org/C95373548","wikidata":"https://www.wikidata.org/wiki/Q13632","display_name":"Planetary nebula","level":3,"score":0.9047911167144775},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8482133746147156},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.7289260625839233},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.5343301296234131},{"id":"https://openalex.org/C198352243","wikidata":"https://www.wikidata.org/wiki/Q37105","display_name":"Line (geometry)","level":2,"score":0.5054576396942139},{"id":"https://openalex.org/C2779496878","wikidata":"https://www.wikidata.org/wiki/Q42372","display_name":"Nebula","level":3,"score":0.4693302512168884},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.46193113923072815},{"id":"https://openalex.org/C40833965","wikidata":"https://www.wikidata.org/wiki/Q6901438","display_name":"Monochromatic color","level":2,"score":0.4561353325843811},{"id":"https://openalex.org/C184665706","wikidata":"https://www.wikidata.org/wiki/Q186310","display_name":"Halo","level":3,"score":0.43286392092704773},{"id":"https://openalex.org/C150846664","wikidata":"https://www.wikidata.org/wiki/Q7602306","display_name":"Stars","level":2,"score":0.3053891658782959},{"id":"https://openalex.org/C98444146","wikidata":"https://www.wikidata.org/wiki/Q318","display_name":"Galaxy","level":2,"score":0.19221976399421692},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0907345712184906},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1086/157339","doi":"https://doi.org/10.1086/157339","is_oa":false,"landing_page_url":"https://doi.org/10.1086/157339","pdf_url":null,"source":{"id":"https://openalex.org/S1980519","display_name":"The Astrophysical Journal","issn_l":"0004-637X","issn":["0004-637X","1538-4357"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-1","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astrophysical Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2055895850","https://openalex.org/W2087694398","https://openalex.org/W116029726","https://openalex.org/W1548223169","https://openalex.org/W4232704267","https://openalex.org/W2016380395","https://openalex.org/W3093282274","https://openalex.org/W2087887943","https://openalex.org/W2009730052","https://openalex.org/W2081164209"],"abstract_inverted_index":{"Monochromatic":[0],"electronographic":[1],"data":[2,14,30],"for":[3,15,37],"NGC":[4,43],"7027":[5,44],"at":[6],"nine":[7],"different":[8],"wavelengths":[9],"are":[10,22],"presented.":[11,24],"High-resolution":[12],"spectrometric":[13],"the":[16,26,38,52,66],"forbidden":[17],"O":[18],"III":[19],"5007-A":[20],"line":[21],"also":[23],"On":[25],"basis":[27],"of":[28,42],"these":[29],"and":[31,47,56],"existing":[32],"radio":[33],"data,":[34],"a":[35,62],"model":[36],"H":[39,67],"II":[40,68],"region":[41],"is":[45,49,79],"specified,":[46],"it":[48],"proposed":[50],"that":[51],"long-wave":[53],"infrared":[54],"excess":[55],"extended":[57],"optical":[58],"halo":[59],"originate":[60],"in":[61],"reflection":[63],"nebula":[64],"surrounding":[65],"region.":[69],"A":[70],"central":[71],"star":[72],"effective":[73],"temperature":[74],"greater":[75],"than":[76],"200,000":[77],"K":[78],"deduced.":[80]},"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2017,"cited_by_count":1}],"updated_date":"2026-10-17T09:40:24.721904","created_date":"2016-06-24T00:00:00"}
