{"id":"https://openalex.org/W1970248503","doi":"https://doi.org/10.1086/173292","title":"Hubble Space Telescope Imaging of the Narrow-Line Region of NGC 4151","display_name":"Hubble Space Telescope Imaging of the Narrow-Line Region of NGC 4151","publication_year":1993,"publication_date":"1993-11-01","ids":{"openalex":"https://openalex.org/W1970248503","doi":"https://doi.org/10.1086/173292","mag":"1970248503"},"language":"en","primary_location":{"id":"doi:10.1086/173292","doi":"https://doi.org/10.1086/173292","is_oa":false,"landing_page_url":"https://doi.org/10.1086/173292","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","is_traditional":true,"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/A5017782002","display_name":"I. N. Evans","orcid":"https://orcid.org/0000-0003-0494-743X","observed_orcids":["https://orcid.org/0000-0003-0494-743X"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"I. N. Evans","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5077798165","display_name":"Zlatan I. Tsvetanov","orcid":"https://orcid.org/0000-0001-6177-6767","observed_orcids":["https://orcid.org/0000-0001-6177-6767"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Z. Tsvetanov","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5090292864","display_name":"Gerard A. Kriss","orcid":"https://orcid.org/0000-0002-2180-8266","observed_orcids":["https://orcid.org/0000-0002-2180-8266"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"G. A. Kriss","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083572056","display_name":"H. C. Ford","orcid":"https://orcid.org/0000-0001-8505-9535","observed_orcids":["https://orcid.org/0000-0001-8505-9535"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. C. Ford","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5038653240","display_name":"S. Caganoff","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"S. Caganoff","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5054552302","display_name":"Anuradha P. Koratkar","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"A. P. Koratkar","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":9.3839,"has_fulltext":false,"cited_by_count":105,"citation_normalized_percentile":{"value":0.97791836,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":97},"biblio":{"volume":"417","issue":null,"first_page":"82","last_page":"82"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.9789999723434448,"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/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.9789999723434448,"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/T10744","display_name":"Astrophysical Phenomena and Observations","score":0.017000000923871994,"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":0.0010000000474974513,"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-4151","display_name":"NGC 4151","score":1.0},{"id":"https://openalex.org/keywords/narrow-line-region","display_name":"narrow-line region","score":0.9879999756813049},{"id":"https://openalex.org/keywords/active-galactic-nuclei","display_name":"active galactic nuclei","score":0.800000011920929},{"id":"https://openalex.org/keywords/o-iii-5007-emission","display_name":"[O III] 5007 emission","score":0.8500000238418579},{"id":"https://openalex.org/keywords/h-alpha-emission","display_name":"H-alpha emission","score":0.6209999918937683},{"id":"https://openalex.org/keywords/broad-line-region","display_name":"broad-line region","score":0.7839999794960022},{"id":"https://openalex.org/keywords/molecular-torus","display_name":"molecular torus","score":0.843999981880188},{"id":"https://openalex.org/keywords/unified-model","display_name":"unified model","score":0.7400000095367432},{"id":"https://openalex.org/keywords/column-density","display_name":"column density","score":0.6520000100135803}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9220729470252991},{"id":"https://openalex.org/C26141928","wikidata":"https://www.wikidata.org/wiki/Q2030382","display_name":"Doubly ionized oxygen","level":4,"score":0.7013208866119385},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.6685886979103088},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.610245943069458},{"id":"https://openalex.org/C198352243","wikidata":"https://www.wikidata.org/wiki/Q37105","display_name":"Line (geometry)","level":2,"score":0.4912680983543396},{"id":"https://openalex.org/C2780928442","wikidata":"https://www.wikidata.org/wiki/Q6553027","display_name":"Line-of-sight","level":2,"score":0.42791447043418884},{"id":"https://openalex.org/C96141758","wikidata":"https://www.wikidata.org/wiki/Q216817","display_name":"Emission spectrum","level":3,"score":0.4002648591995239},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.1473465859889984},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1086/173292","doi":"https://doi.org/10.1086/173292","is_oa":false,"landing_page_url":"https://doi.org/10.1086/173292","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":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W168001643","https://openalex.org/W2065502572","https://openalex.org/W2057049705","https://openalex.org/W3010408013","https://openalex.org/W2990354734","https://openalex.org/W2011927288","https://openalex.org/W2016731423","https://openalex.org/W1977737065","https://openalex.org/W2118827411","https://openalex.org/W2079855974"],"abstract_inverted_index":{"We":[0,115,188],"have":[1],"used":[2],"the":[3,7,29,37,59,99,107,110,123,133,158,162,174,178,208,214],"Planetary":[4],"Camera":[5],"aboard":[6],"Hubble":[8],"Space":[9],"Telescope":[10],"to":[11,176,185],"obtain":[12],"high":[13],"spatial":[14],"resolution":[15],"[O":[16,54,100],"III]":[17,55,101],"\u03bb5007":[18,56,102],"and":[19,87,151,212],"H\u03b1":[20,38],"\u03bb6563":[21,39],"+":[22,40],"[N":[23,41],"II]":[24,42],"\u03bb\u03bb6548,":[25,43],"6583":[26,44],"images":[27],"of":[28,31,36,65,85,98,109,122,130,139,161],"nucleus":[30],"NGC":[32],"4151.":[33],"Almost":[34],"all":[35],"emission":[45,103],"arises":[46],"from":[47,117,207,213],"an":[48],"unresolved":[49],"nuclear":[50,111,179],"point":[51,79],"source.":[52,114],"The":[53,95,136],"image":[57],"resolves":[58],"narrow-line":[60,124],"region":[61,125],"into":[62],"a":[63,70,77,81,88,120,140,146,152,167],"number":[64],"emission-line":[66],"clouds":[67],"distributed":[68],"in":[69],"biconical":[71,153],"structure":[72],"with":[73,76,106,197,203],"apices":[74],"coincident":[75],"central":[78,147],"source,":[80],"projected":[82,89],"opening":[83],"angle":[84,97],"75\u00b0\u00b110\u00b0,":[86],"axis":[90],"oriented":[91],"along":[92],"P.A.":[93],"60\u00b0/240\u00b0\u00b15\u00b0.":[94],"position":[96],"is":[104],"aligned":[105],"extension":[108],"VLBI":[112],"radio":[113],"infer":[116],"these":[118],"data":[119,199],"geometry":[121,155],"that":[126,157,165,194],"places":[127],"our":[128,198],"line":[129],"sight":[131],"outside":[132],"ionization":[134,154],"cones.":[135],"simultaneous":[137],"presence":[138],"nearly":[141],"unobscured":[142],"UV/":[143],"optical":[144],"continuum,":[145],"pointlike":[148],"broad-line":[149],"region,":[150],"argues":[156],"simplest":[159],"version":[160],"unified":[163],"model":[164],"invokes":[166],"very":[168],"optically":[169],"thick":[170],"molecular":[171],"torus":[172],"surrounding":[173],"BLR":[175],"collimate":[177],"ionizing":[180],"radiation":[181],"does":[182],"not":[183],"apply":[184],"this":[186],"object.":[187],"consider":[189],"several":[190],"alternative":[191],"collimation":[192],"mechanisms":[193],"are":[195],"compatible":[196],"as":[200,202],"well":[201],"column":[204],"densities":[205],"inferred":[206],"UV":[209],"absorption":[210],"lines":[211],"X-ray":[215],"spectrum.":[216]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":4},{"year":2023,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":3},{"year":2016,"cited_by_count":2},{"year":2014,"cited_by_count":2},{"year":2013,"cited_by_count":2}],"updated_date":"2026-11-12T12:28:57.059296","created_date":"2016-06-24T00:00:00"}