{"id":"https://openalex.org/W2139734495","doi":"https://doi.org/10.1051/0004-6361:20011017","title":"Research NoteTh4-4: A Be star which has turned into a planetary nebula within 30 years","display_name":"Research NoteTh4-4: A Be star which has turned into a planetary nebula within 30 years","publication_year":2001,"publication_date":"2001-09-01","ids":{"openalex":"https://openalex.org/W2139734495","doi":"https://doi.org/10.1051/0004-6361:20011017","mag":"2139734495"},"language":"en","primary_location":{"id":"doi:10.1051/0004-6361:20011017","doi":"https://doi.org/10.1051/0004-6361:20011017","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361:20011017","pdf_url":"https://www.aanda.org/articles/aa/pdf/2001/36/aa1016.pdf","source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-3","ki-jl-2","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319748","host_organization_name":"EDP Sciences","host_organization_lineage":["https://openalex.org/P4310319748","https://openalex.org/P4310319982"],"host_organization_lineage_names":["EDP Sciences","Science Press"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy & Astrophysics","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://www.aanda.org/articles/aa/pdf/2001/36/aa1016.pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5042309929","display_name":"L. N. Kondratyeva","orcid":"https://orcid.org/0000-0002-6302-2851","observed_orcids":["https://orcid.org/0000-0002-6302-2851"]},"institutions":[{"id":"https://openalex.org/I2801153214","display_name":"Fesenkov Astrophysical Institute","ror":"https://ror.org/02737yq40","country_code":"KZ","type":"facility","lineage":["https://openalex.org/I2801153214"]}],"countries":["KZ"],"is_corresponding":true,"raw_author_name":"L. N. Kondratyeva","raw_affiliation_strings":["Fesenkov Astrophysical Institute, Kazakhstan, Isaak Newton Institute of Chile, Kazakhstan Branch, 480020 Almaty Observatory, Kazakhstan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Fesenkov Astrophysical Institute, Kazakhstan, Isaak Newton Institute of Chile, Kazakhstan Branch, 480020 Almaty Observatory, Kazakhstan","institution_ids":["https://openalex.org/I2801153214"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5042309929"],"corresponding_institution_ids":["https://openalex.org/I2801153214"],"apc_list":{"value":1650,"currency":"EUR","value_usd":1865},"apc_paid":null,"fwci":0.4748,"has_fulltext":true,"cited_by_count":4,"citation_normalized_percentile":{"value":0.66763352,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":93},"biblio":{"volume":"376","issue":"3","first_page":"978","last_page":"981"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.9994999766349792,"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/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.9994999766349792,"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","score":9.999999747378752e-05,"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/T10477","display_name":"Astrophysics and Star Formation Studies","score":9.999999747378752e-05,"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/be-stars","display_name":"Be stars","score":0.8420000076293945},{"id":"https://openalex.org/keywords/planetary-nebulae","display_name":"planetary nebulae","score":0.925000011920929},{"id":"https://openalex.org/keywords/stellar-evolution","display_name":"stellar evolution","score":0.5839999914169312},{"id":"https://openalex.org/keywords/optical-spectra","display_name":"optical spectra","score":0.40400001406669617},{"id":"https://openalex.org/keywords/o-iii-emission","display_name":"[O III] emission","score":0.9010000228881836},{"id":"https://openalex.org/keywords/circumstellar-envelopes","display_name":"circumstellar envelopes","score":0.8149999976158142},{"id":"https://openalex.org/keywords/effective-temperature","display_name":"effective temperature","score":0.8429999947547913}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9350445866584778},{"id":"https://openalex.org/C95373548","wikidata":"https://www.wikidata.org/wiki/Q13632","display_name":"Planetary nebula","level":3,"score":0.8340343236923218},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.8066802024841309},{"id":"https://openalex.org/C2779496878","wikidata":"https://www.wikidata.org/wiki/Q42372","display_name":"Nebula","level":3,"score":0.6537970304489136},{"id":"https://openalex.org/C2780897414","wikidata":"https://www.wikidata.org/wiki/Q7600592","display_name":"Star (game theory)","level":2,"score":0.6296945810317993},{"id":"https://openalex.org/C96141758","wikidata":"https://www.wikidata.org/wiki/Q216817","display_name":"Emission spectrum","level":3,"score":0.6202597618103027},{"id":"https://openalex.org/C97818539","wikidata":"https://www.wikidata.org/wiki/Q202265","display_name":"Emission nebula","level":4,"score":0.6129424571990967},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.58710116147995},{"id":"https://openalex.org/C13565188","wikidata":"https://www.wikidata.org/wiki/Q854050","display_name":"Effective temperature","level":3,"score":0.5388310551643372},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.5167304873466492},{"id":"https://openalex.org/C3020018894","wikidata":"https://www.wikidata.org/wiki/Q76299","display_name":"Optical spectra","level":3,"score":0.4860730469226837},{"id":"https://openalex.org/C65155139","wikidata":"https://www.wikidata.org/wiki/Q5380912","display_name":"Envelope (radar)","level":3,"score":0.4756609797477722},{"id":"https://openalex.org/C170084019","wikidata":"https://www.wikidata.org/wiki/Q2035809","display_name":"Protoplanetary nebula","level":4,"score":0.4263906478881836},{"id":"https://openalex.org/C2776368116","wikidata":"https://www.wikidata.org/wiki/Q1086143","display_name":"Circumstellar envelope","level":3,"score":0.423573762178421},{"id":"https://openalex.org/C6293838","wikidata":"https://www.wikidata.org/wiki/Q2722426","display_name":"Bipolar nebula","level":5,"score":0.4176673889160156},{"id":"https://openalex.org/C150846664","wikidata":"https://www.wikidata.org/wiki/Q7602306","display_name":"Stars","level":2,"score":0.38572439551353455},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1051/0004-6361:20011017","doi":"https://doi.org/10.1051/0004-6361:20011017","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361:20011017","pdf_url":"https://www.aanda.org/articles/aa/pdf/2001/36/aa1016.pdf","source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-3","ki-jl-2","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319748","host_organization_name":"EDP Sciences","host_organization_lineage":["https://openalex.org/P4310319748","https://openalex.org/P4310319982"],"host_organization_lineage_names":["EDP Sciences","Science Press"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy & Astrophysics","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1051/0004-6361:20011017","doi":"https://doi.org/10.1051/0004-6361:20011017","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361:20011017","pdf_url":"https://www.aanda.org/articles/aa/pdf/2001/36/aa1016.pdf","source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-3","ki-jl-2","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319748","host_organization_name":"EDP Sciences","host_organization_lineage":["https://openalex.org/P4310319748","https://openalex.org/P4310319982"],"host_organization_lineage_names":["EDP Sciences","Science Press"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy & Astrophysics","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2139734495.pdf","grobid_xml":"https://content.openalex.org/works/W2139734495.grobid-xml"},"referenced_works_count":9,"referenced_works":["https://openalex.org/W1617827352","https://openalex.org/W1629432247","https://openalex.org/W1652571115","https://openalex.org/W1663643978","https://openalex.org/W1965720272","https://openalex.org/W1975905524","https://openalex.org/W1991156189","https://openalex.org/W2146394902","https://openalex.org/W3021840914"],"related_works":["https://openalex.org/W4406150860","https://openalex.org/W3000036725","https://openalex.org/W3163322029","https://openalex.org/W1624382728","https://openalex.org/W3029064525","https://openalex.org/W4409733025","https://openalex.org/W4255672658","https://openalex.org/W1981080067","https://openalex.org/W334893142","https://openalex.org/W3153774211"],"abstract_inverted_index":{"The":[0,67],"first":[1],"optical":[2,52],"spectra":[3],"of":[4,46,54,61,69,81],"Th4-4,":[5],"obtained":[6],"by":[7],"the":[8,26,41,44,51,70,78,82,97],"author":[9],"in":[10,40],"1970,":[11],"showed":[12],"strong":[13],"continuum":[14],"and":[15,77],"broad":[16],"HI":[17],"emission":[18,37],"lines.":[19],"In":[20],"other":[21],"words,":[22],"at":[23],"this":[24],"time":[25],"object":[27,71],"looked":[28],"like":[29],"a":[30,47,62],"Be":[31],"star.":[32],"Some":[33],"years":[34],"later,":[35],"[OIII]":[36],"lines":[38],"appeared":[39],"spectrum":[42,53],"indicating":[43],"existence":[45],"gaseous":[48],"envelope.":[49],"Today":[50],"Th4-4":[55],"is":[56],"quite":[57],"similar":[58],"to":[59,75,92],"that":[60],"moderate":[63],"excitation":[64],"planetary":[65],"nebula.":[66],"magnitude":[68],"has":[72,85],"dropped":[73],"from":[74,87],",":[76],"effective":[79],"temperature":[80],"central":[83],"star":[84],"increased":[86],"22":[88],"000":[89,94],"K":[90,95],"up":[91],"40":[93],"within":[96],"last":[98],"30":[99],"years.":[100]},"counts_by_year":[{"year":2025,"cited_by_count":1}],"updated_date":"2026-11-13T13:42:25.865203","created_date":"2016-06-24T00:00:00"}