{"id":"https://openalex.org/W7165035663","doi":"https://doi.org/10.48550/arxiv.2606.17284","title":"Shadow, Emission, and Strong-Field Lensing of Dilatonic Black Holes","display_name":"Shadow, Emission, and Strong-Field Lensing of Dilatonic Black Holes","publication_year":2026,"publication_date":"2026-06-15","ids":{"openalex":"https://openalex.org/W7165035663","doi":"https://doi.org/10.48550/arxiv.2606.17284"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2606.17284","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2606.17284","pdf_url":"https://arxiv.org/pdf/2606.17284","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2606.17284","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5040246301","display_name":"Kuantay Boshkayev","orcid":"https://orcid.org/0000-0002-1385-270X","observed_orcids":["https://orcid.org/0000-0002-1385-270X"]},"institutions":[{"id":"https://openalex.org/I185571130","display_name":"Al-Farabi Kazakh National University","ror":"https://ror.org/03q0vrn42","country_code":"KZ","type":"education","lineage":["https://openalex.org/I185571130"]}],"countries":["KZ"],"is_corresponding":false,"raw_author_name":"Boshkayev, Kuantay","raw_affiliation_strings":["Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and","institution_ids":["https://openalex.org/I185571130"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5007507326","display_name":"Ainur Urazalina","orcid":"https://orcid.org/0000-0002-4633-9558","observed_orcids":["https://orcid.org/0000-0002-4633-9558"]},"institutions":[{"id":"https://openalex.org/I185571130","display_name":"Al-Farabi Kazakh National University","ror":"https://ror.org/03q0vrn42","country_code":"KZ","type":"education","lineage":["https://openalex.org/I185571130"]}],"countries":["KZ"],"is_corresponding":false,"raw_author_name":"Urazalina, Ainur","raw_affiliation_strings":["Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and","institution_ids":["https://openalex.org/I185571130"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138858395","display_name":"Aidana Kurmanbek","orcid":"https://orcid.org/0009-0001-8542-7390","observed_orcids":["https://orcid.org/0009-0001-8542-7390"]},"institutions":[{"id":"https://openalex.org/I185571130","display_name":"Al-Farabi Kazakh National University","ror":"https://ror.org/03q0vrn42","country_code":"KZ","type":"education","lineage":["https://openalex.org/I185571130"]}],"countries":["KZ"],"is_corresponding":false,"raw_author_name":"Kurmanbek, Aidana","raw_affiliation_strings":["Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and","institution_ids":["https://openalex.org/I185571130"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010025843","display_name":"Manas Khassanov","orcid":"https://orcid.org/0000-0001-9857-0658","observed_orcids":["https://orcid.org/0000-0001-9857-0658"]},"institutions":[{"id":"https://openalex.org/I185571130","display_name":"Al-Farabi Kazakh National University","ror":"https://ror.org/03q0vrn42","country_code":"KZ","type":"education","lineage":["https://openalex.org/I185571130"]}],"countries":["KZ"],"is_corresponding":false,"raw_author_name":"Khassanov, Manas","raw_affiliation_strings":["Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Experimental and Theoretical Physics , Al-Farabi Kazakh National University , Almaty , 050040 , Kazakhstan and","institution_ids":["https://openalex.org/I185571130"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5014712189","display_name":"Daniya Utepova","orcid":"https://orcid.org/0000-0002-9871-1884","observed_orcids":["https://orcid.org/0000-0002-9871-1884"]},"institutions":[{"id":"https://openalex.org/I4210128045","display_name":"Abai Kazakh National Pedagogical University","ror":"https://ror.org/02bvvhn54","country_code":"KZ","type":"education","lineage":["https://openalex.org/I4210128045"]}],"countries":["KZ"],"is_corresponding":false,"raw_author_name":"Utepova, Daniya","raw_affiliation_strings":["Abai Kazakh National Pedagogical University , Almaty , 050010 , Kazakhstan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Abai Kazakh National Pedagogical University , Almaty , 050010 , Kazakhstan","institution_ids":["https://openalex.org/I4210128045"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10744","display_name":"Astrophysical Phenomena and Observations","score":0.7056000232696533,"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/T10744","display_name":"Astrophysical Phenomena and Observations","score":0.7056000232696533,"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/T10025","display_name":"Black Holes and Theoretical Physics","score":0.27250000834465027,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"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/T10463","display_name":"Pulsars and Gravitational Waves Research","score":0.004999999888241291,"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/dilaton-black-holes","display_name":"dilaton black holes","score":0.9879999756813049},{"id":"https://openalex.org/keywords/black-hole-shadow","display_name":"black hole shadow","score":0.8009999990463257},{"id":"https://openalex.org/keywords/photon-sphere","display_name":"photon sphere","score":0.7289999723434448},{"id":"https://openalex.org/keywords/critical-impact-parameter","display_name":"critical impact parameter","score":0.8980000019073486},{"id":"https://openalex.org/keywords/m87","display_name":"M87","score":0.7929999828338623},{"id":"https://openalex.org/keywords/sgr-a","display_name":"Sgr A*","score":0.9539999961853027},{"id":"https://openalex.org/keywords/deflection-angle","display_name":"deflection angle","score":0.7369999885559082},{"id":"https://openalex.org/keywords/geometric-optics","display_name":"geometrical optics","score":0.5019999742507935},{"id":"https://openalex.org/keywords/high-frequency-emission","display_name":"high-frequency emission","score":0.5019999742507935},{"id":"https://openalex.org/keywords/black-hole-mass-estimation","display_name":"black hole mass estimation","score":0.4699999988079071}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8865000009536743},{"id":"https://openalex.org/C159317903","wikidata":"https://www.wikidata.org/wiki/Q3198","display_name":"Photon","level":2,"score":0.5489000082015991},{"id":"https://openalex.org/C117797892","wikidata":"https://www.wikidata.org/wiki/Q286363","display_name":"Shadow (psychology)","level":2,"score":0.5378000140190125},{"id":"https://openalex.org/C2777391479","wikidata":"https://www.wikidata.org/wiki/Q5178040","display_name":"Coupling parameter","level":2,"score":0.48339998722076416},{"id":"https://openalex.org/C178635117","wikidata":"https://www.wikidata.org/wiki/Q747499","display_name":"RADIUS","level":2,"score":0.4763000011444092},{"id":"https://openalex.org/C39927690","wikidata":"https://www.wikidata.org/wiki/Q11197","display_name":"Logarithm","level":2,"score":0.4666000008583069},{"id":"https://openalex.org/C175757954","wikidata":"https://www.wikidata.org/wiki/Q2361910","display_name":"Photon sphere","level":5,"score":0.46050000190734863},{"id":"https://openalex.org/C3079626","wikidata":"https://www.wikidata.org/wiki/Q234881","display_name":"Quantum electrodynamics","level":1,"score":0.45419999957084656},{"id":"https://openalex.org/C2781355719","wikidata":"https://www.wikidata.org/wiki/Q2080698","display_name":"Deflection (physics)","level":2,"score":0.40119999647140503},{"id":"https://openalex.org/C2991746120","wikidata":"https://www.wikidata.org/wiki/Q210028","display_name":"Deflection angle","level":2,"score":0.3758000135421753},{"id":"https://openalex.org/C131584629","wikidata":"https://www.wikidata.org/wiki/Q4308705","display_name":"Coupling (piping)","level":2,"score":0.3610999882221222},{"id":"https://openalex.org/C90167683","wikidata":"https://www.wikidata.org/wiki/Q903040","display_name":"Impact parameter","level":2,"score":0.34689998626708984},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.3409000039100647},{"id":"https://openalex.org/C188082385","wikidata":"https://www.wikidata.org/wiki/Q73792","display_name":"Charge (physics)","level":2,"score":0.2946999967098236},{"id":"https://openalex.org/C2778785133","wikidata":"https://www.wikidata.org/wiki/Q25303639","display_name":"Photon energy","level":3,"score":0.2912999987602234},{"id":"https://openalex.org/C57691317","wikidata":"https://www.wikidata.org/wiki/Q1289248","display_name":"Scalar (mathematics)","level":2,"score":0.28439998626708984},{"id":"https://openalex.org/C172790937","wikidata":"https://www.wikidata.org/wiki/Q18343","display_name":"Dark energy","level":3,"score":0.2743000090122223},{"id":"https://openalex.org/C73586568","wikidata":"https://www.wikidata.org/wiki/Q2600211","display_name":"Parameter space","level":2,"score":0.2702000141143799},{"id":"https://openalex.org/C46244369","wikidata":"https://www.wikidata.org/wiki/Q193709","display_name":"Rayleigh scattering","level":2,"score":0.26829999685287476},{"id":"https://openalex.org/C56764","wikidata":"https://www.wikidata.org/wiki/Q2998314","display_name":"Observational cosmology","level":4,"score":0.2660999894142151},{"id":"https://openalex.org/C117647685","wikidata":"https://www.wikidata.org/wiki/Q4241349","display_name":"Critical radius","level":3,"score":0.25029999017715454}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2606.17284","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2606.17284","pdf_url":"https://arxiv.org/pdf/2606.17284","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2606.17284","doi":"https://doi.org/10.48550/arxiv.2606.17284","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2606.17284","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2606.17284","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2606.17284","pdf_url":"https://arxiv.org/pdf/2606.17284","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7165035663.pdf","grobid_xml":"https://content.openalex.org/works/W7165035663.grobid-xml"},"referenced_works_count":26,"referenced_works":["https://openalex.org/W1500315098","https://openalex.org/W1583386027","https://openalex.org/W1969876157","https://openalex.org/W1994258568","https://openalex.org/W2010293149","https://openalex.org/W2013658388","https://openalex.org/W2017440622","https://openalex.org/W2037544814","https://openalex.org/W2071611651","https://openalex.org/W2079320049","https://openalex.org/W2081233700","https://openalex.org/W2083885738","https://openalex.org/W2600882545","https://openalex.org/W2779301413","https://openalex.org/W2936349953","https://openalex.org/W2964272950","https://openalex.org/W2995560533","https://openalex.org/W3117515744","https://openalex.org/W3161457974","https://openalex.org/W4280589633","https://openalex.org/W4310152974","https://openalex.org/W4388961630","https://openalex.org/W4407794306","https://openalex.org/W4413867078","https://openalex.org/W4416949285","https://openalex.org/W7165156519"],"related_works":["https://openalex.org/W4205203711","https://openalex.org/W4416949285","https://openalex.org/W4413413896","https://openalex.org/W7165156519","https://openalex.org/W2023913114","https://openalex.org/W4417453654","https://openalex.org/W4408909742","https://openalex.org/W3202194077","https://openalex.org/W7223377735","https://openalex.org/W1969876157"],"abstract_inverted_index":{"We":[0,43,76,106],"study":[1],"the":[2,34,38,50,69,80,87,91,97,109,115,120,127,131,135,141],"shadow":[3,25,54],"and":[4,24,29,37,53,74,103,118],"strong-field":[5,136],"optical":[6],"properties":[7],"of":[8,33,130,140],"a":[9,58],"static,":[10],"spherically":[11],"symmetric":[12],"dyon-like":[13],"dilatonic":[14,39],"black":[15],"hole.":[16],"The":[17,62],"photon":[18,51],"sphere":[19,52],"radius,":[20],"critical":[21],"impact":[22],"parameter,":[23],"radius":[26],"are":[27,144],"obtained":[28,142],"analyzed":[30],"in":[31,114,134],"terms":[32],"charge":[35],"$Q$":[36],"coupling":[40],"parameter":[41],"$a$.":[42],"show":[44,78],"that":[45,79],"increasing":[46],"these":[47],"parameters":[48],"decreases":[49],"radii,":[55],"leading":[56,121],"to":[57],"smaller":[59],"apparent":[60],"shadow.":[61],"predicted":[63],"angular":[64],"diameter":[65],"is":[66],"compared":[67],"with":[68],"observational":[70],"data":[71,83],"for":[72,93],"M87$^{*}$":[73],"SgrA$^{*}$.":[75],"explicitly":[77],"Sgr":[81],"A*":[82],"do":[84],"not":[85],"constrain":[86],"model":[88],"parameters,":[89],"whereas":[90],"results":[92],"M87*":[94],"depend":[95],"on":[96],"adopted":[98],"mass":[99],"estimates":[100],"from":[101],"stellar":[102],"gas":[104],"dynamics.":[105],"also":[107],"estimate":[108],"high-frequency":[110],"energy":[111],"emission":[112],"rate":[113],"geometric-optics":[116],"approximation":[117],"derive":[119],"Bozza":[122],"coefficient":[123],"$\\bar{a}$,":[124],"which":[125],"characterizes":[126],"logarithmic":[128],"behavior":[129],"deflection":[132],"angle":[133],"regime.":[137],"Astrophysical":[138],"implication":[139],"outcomes":[143],"discussed.":[145]},"counts_by_year":[],"updated_date":"2026-11-08T12:12:28.789561","created_date":"2026-06-18T00:00:00"}