{"id":"https://openalex.org/W14416384","doi":null,"title":"Time-Dependent Dynamics of a Planar Galaxy Model","display_name":"Time-Dependent Dynamics of a Planar Galaxy Model","publication_year":1990,"publication_date":"1990-08-15","ids":{"openalex":"https://openalex.org/W14416384","mag":"14416384"},"language":"en","primary_location":{"id":"pmh:oai:eprints.iisc.ac.in:34925","doi":null,"is_oa":false,"landing_page_url":"http://eprints.iisc.ac.in/34925/1/Time.pdf","pdf_url":"http://eprints.iisc.ac.in/34925/1/Time.pdf","source":{"id":"https://openalex.org/S4377196309","display_name":"NOT FOUND REPOSITORY (Indian Institute of Science Bangalore)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I59270414","host_organization_name":"Indian Institute of Science Bangalore","host_organization_lineage":["https://openalex.org/I59270414"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"","raw_type":"Journal Article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":null,"display_name":"S. Sridhar","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"S. Sridhar","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5087513200","display_name":"Rajaram Nityananda","orcid":"https://orcid.org/0000-0002-7910-6363","observed_orcids":["https://orcid.org/0000-0002-7910-6363"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Rajaram Nityananda","raw_affiliation_strings":[],"raw_orcid":"https://orcid.org/0000-0002-7910-6363","affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.8484,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.73701012,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"245","issue":"4","first_page":"713","last_page":"719"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.9800000190734863,"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":0.9800000190734863,"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":0.01590000092983246,"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":0.001500000013038516,"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/collisionless-stellar-systems","display_name":"collisionless stellar systems","score":0.7940000295639038},{"id":"https://openalex.org/keywords/harmonic-potential","display_name":"harmonic potential","score":0.7229999899864197},{"id":"https://openalex.org/keywords/conserved-quantities","display_name":"first integrals","score":0.6830000281333923},{"id":"https://openalex.org/keywords/phase-space-volume","display_name":"phase space volume","score":0.5460000038146973},{"id":"https://openalex.org/keywords/tidal-encounters","display_name":"tidal encounters","score":0.8379999995231628},{"id":"https://openalex.org/keywords/angular-momentum-transport","display_name":"angular momentum transport","score":0.7850000262260437},{"id":"https://openalex.org/keywords/energy-transfer","display_name":"energy transfer","score":0.9950000047683716},{"id":"https://openalex.org/keywords/impulse-approximation","display_name":"impulse approximation","score":0.5289999842643738},{"id":"https://openalex.org/keywords/quadrupole-moment","display_name":"quadrupole moment","score":0.7360000014305115}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9314968585968018},{"id":"https://openalex.org/C155675718","wikidata":"https://www.wikidata.org/wiki/Q161254","display_name":"Angular momentum","level":2,"score":0.7555191516876221},{"id":"https://openalex.org/C151342819","wikidata":"https://www.wikidata.org/wiki/Q62542","display_name":"Phase space","level":2,"score":0.7089956998825073},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.5512831211090088},{"id":"https://openalex.org/C57489055","wikidata":"https://www.wikidata.org/wiki/Q190046","display_name":"Ellipsoid","level":2,"score":0.505024254322052},{"id":"https://openalex.org/C134786449","wikidata":"https://www.wikidata.org/wiki/Q3391255","display_name":"Planar","level":2,"score":0.50006103515625},{"id":"https://openalex.org/C70836080","wikidata":"https://www.wikidata.org/wiki/Q837940","display_name":"Impulse (physics)","level":2,"score":0.48337167501449585},{"id":"https://openalex.org/C39984356","wikidata":"https://www.wikidata.org/wiki/Q2121987","display_name":"Quadrupole","level":2,"score":0.46746161580085754},{"id":"https://openalex.org/C45193367","wikidata":"https://www.wikidata.org/wiki/Q1141095","display_name":"Total angular momentum quantum number","level":3,"score":0.4412466883659363},{"id":"https://openalex.org/C56181872","wikidata":"https://www.wikidata.org/wiki/Q4010521","display_name":"Specific relative angular momentum","level":5,"score":0.4261322319507599},{"id":"https://openalex.org/C10238366","wikidata":"https://www.wikidata.org/wiki/Q165618","display_name":"Moment of inertia","level":2,"score":0.4166964888572693},{"id":"https://openalex.org/C20782240","wikidata":"https://www.wikidata.org/wiki/Q3272968","display_name":"Angular momentum coupling","level":4,"score":0.25666385889053345},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.15035563707351685},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.09365895390510559},{"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/C121684516","wikidata":"https://www.wikidata.org/wiki/Q7600677","display_name":"Computer graphics (images)","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:eprints.iisc.ac.in:34925","doi":null,"is_oa":false,"landing_page_url":"http://eprints.iisc.ac.in/34925/1/Time.pdf","pdf_url":"http://eprints.iisc.ac.in/34925/1/Time.pdf","source":{"id":"https://openalex.org/S4377196309","display_name":"NOT FOUND REPOSITORY (Indian Institute of Science Bangalore)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I59270414","host_organization_name":"Indian Institute of Science Bangalore","host_organization_lineage":["https://openalex.org/I59270414"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"","raw_type":"Journal Article"},{"id":"mag:14416384","doi":null,"is_oa":false,"landing_page_url":"http://dspace.rri.res.in/handle/2289/1511","pdf_url":null,"source":{"id":"https://openalex.org/S195663288","display_name":"Monthly Notices of the Royal Astronomical Society","issn_l":"0035-8711","issn":["0035-8711","1365-2966","1365-8711"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-2","ki-jl-1","norway-1","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311648","host_organization_name":"Oxford University Press","host_organization_lineage":["https://openalex.org/P4310311648","https://openalex.org/P4310311647"],"host_organization_lineage_names":["Oxford University Press","University of Oxford"],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"Monthly Notices of the Royal Astronomical Society","raw_type":null}],"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/W2017186502","https://openalex.org/W3134929998","https://openalex.org/W2050304883","https://openalex.org/W4229631896","https://openalex.org/W7053188563","https://openalex.org/W6987328686","https://openalex.org/W1984146192","https://openalex.org/W2076145995","https://openalex.org/W2219230317","https://openalex.org/W2066720980"],"abstract_inverted_index":{"Time-dependent":[0],"models":[1],"of":[2,82,85,89,108,132,134,154,162],"collisionless":[3],"stellar":[4],"systems":[5,42],"with":[6,166],"harmonic":[7],"potentials":[8],"allowing":[9],"for":[10,58,158],"an":[11,159],"essentially":[12],"exact":[13],"analytic":[14],"description":[15],"have":[16],"recently":[17],"been":[18],"described.":[19],"These":[20,75],"include":[21],"oscillating":[22],"spheres":[23],"and":[24,66,128,140],"spheroids.":[25],"This":[26],"paper":[27,104],"extends":[28],"the":[29,41,59,80,86,94,99,106,125,130,135,152,155,163],"analysis":[30],"to":[31,37,56,113,122,148],"time-dependent":[32],"elliptic":[33],"discs.":[34],"Although":[35],"restricted":[36],"two":[38,69],"space":[39,53,91],"dimensions,":[40],"are":[43],"richer":[44],"in":[45],"that":[46],"their":[47],"parameters":[48],"form":[49],"a":[50,114],"10-dimensional":[51],"phase":[52,90],"(in":[54],"contrast":[55],"six":[57],"earlier":[60],"models).":[61],"Apart":[62],"from":[63],"total":[64],"energy":[65,139],"angular":[67],"momentum,":[68],"additional":[70],"conserved":[71,100],"quantities":[72],"emerge":[73],"naturally.":[74],"can":[76],"be":[77],"chosen":[78],"as":[79,151],"areas":[81],"extremal":[83],"sections":[84],"ellipsoidal":[87],"region":[88],"occupied":[92],"by":[93],"system":[95,137],"(their":[96],"product":[97],"gives":[98],"volume).":[101],"The":[102,143],"present":[103],"describes":[105],"construction":[107],"these":[109],"models.":[110],"An":[111],"application":[112],"tidal":[115],"encounter":[116,156],"is":[117,146],"given":[118],"which":[119],"allows":[120],"one":[121],"go":[123],"beyond":[124],"impulse":[126],"approximation":[127],"demonstrates":[129],"effects":[131],"rotation":[133],"perturbed":[136,164],"on":[138],"angular-momentum":[141,144],"transfer.":[142],"transfer":[145],"shown":[147],"scale":[149],"inversely":[150],"cube":[153],"velocity":[157],"initial":[160],"configuration":[161],"galaxy":[165],"zero":[167],"quadrupole":[168],"moment.":[169]},"counts_by_year":[],"updated_date":"2026-09-29T14:09:16.559479","created_date":"2016-06-24T00:00:00"}
