{"id":"https://openalex.org/W7220739824","doi":"https://doi.org/10.48550/arxiv.2610.06525","title":"Collisional excitation of SiC$_6$ by helium: cross sections, rate coefficients, and astrophysical implications","display_name":"Collisional excitation of SiC$_6$ by helium: cross sections, rate coefficients, and astrophysical implications","publication_year":2026,"publication_date":"2026-10-05","ids":{"openalex":"https://openalex.org/W7220739824","doi":"https://doi.org/10.48550/arxiv.2610.06525"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2610.06525","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2610.06525","pdf_url":"https://arxiv.org/pdf/2610.06525","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":null,"license_id":null,"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/2610.06525","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5128171650","display_name":"Liman Tian","orcid":"https://orcid.org/0009-0009-3771-8263","observed_orcids":["https://orcid.org/0009-0009-3771-8263"]},"institutions":[{"id":"https://openalex.org/I1284762954","display_name":"Zhejiang A & F University","ror":"https://ror.org/02vj4rn06","country_code":"CN","type":"education","lineage":["https://openalex.org/I1284762954"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Tian, Liman","raw_affiliation_strings":["College of Optical , Mechanical and Electrical Engineering ( College of Intelligent Equipment Engineering) , Zhejiang A & F University , Hangzhou 311300 , People's Republic of China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"College of Optical , Mechanical and Electrical Engineering ( College of Intelligent Equipment Engineering) , Zhejiang A & F University , Hangzhou 311300 , People's Republic of China","institution_ids":["https://openalex.org/I1284762954"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063775731","display_name":"Ziyu Xiang","orcid":"https://orcid.org/0000-0002-3954-7631","observed_orcids":["https://orcid.org/0000-0002-3954-7631"]},"institutions":[{"id":"https://openalex.org/I1284762954","display_name":"Zhejiang A & F University","ror":"https://ror.org/02vj4rn06","country_code":"CN","type":"education","lineage":["https://openalex.org/I1284762954"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xiang, Ziyu","raw_affiliation_strings":["College of Optical , Mechanical and Electrical Engineering ( College of Intelligent Equipment Engineering) , Zhejiang A & F University , Hangzhou 311300 , People's Republic of China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"College of Optical , Mechanical and Electrical Engineering ( College of Intelligent Equipment Engineering) , Zhejiang A & F University , Hangzhou 311300 , People's Republic of China","institution_ids":["https://openalex.org/I1284762954"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5137253489","display_name":"Chuangang Ning","orcid":"https://orcid.org/0000-0002-3158-1253","observed_orcids":["https://orcid.org/0000-0002-3158-1253"]},"institutions":[{"id":"https://openalex.org/I99065089","display_name":"Tsinghua University","ror":"https://ror.org/03cve4549","country_code":"CN","type":"education","lineage":["https://openalex.org/I99065089"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Ning, Chuangang","raw_affiliation_strings":["Department of Physics , Tsinghua University , Beijing 100084 , People's Republic of China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , Tsinghua University , Beijing 100084 , People's Republic of China","institution_ids":["https://openalex.org/I99065089"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5138176708","display_name":"\u9648\u5c0f\u6797","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1284762954","display_name":"Zhejiang A & F University","ror":"https://ror.org/02vj4rn06","country_code":"CN","type":"education","lineage":["https://openalex.org/I1284762954"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Chen, Xiaolin","raw_affiliation_strings":["College of Optical , Mechanical and Electrical Engineering ( College of Intelligent Equipment Engineering) , Zhejiang A & F University , Hangzhou 311300 , People's Republic of China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"College of Optical , Mechanical and Electrical Engineering ( College of Intelligent Equipment Engineering) , Zhejiang A & F University , Hangzhou 311300 , People's Republic of China","institution_ids":["https://openalex.org/I1284762954"]}]}],"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/T10477","display_name":"Astrophysics and Star Formation Studies","score":0.8246999979019165,"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":0.8246999979019165,"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/T12967","display_name":"Molecular Spectroscopy and Structure","score":0.049800001084804535,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10002","display_name":"Advanced Chemical Physics Studies","score":0.03449999913573265,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"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/helium-collisions","display_name":"helium collisions","score":0.6230000257492065},{"id":"https://openalex.org/keywords/rotational-transitions","display_name":"rotational transitions","score":0.6489999890327454},{"id":"https://openalex.org/keywords/potential-energy-surface","display_name":"potential energy surface","score":0.7509999871253967},{"id":"https://openalex.org/keywords/irc-10216","display_name":"IRC+10216","score":0.8460000157356262},{"id":"https://openalex.org/keywords/brightness-temperature","display_name":"brightness temperature","score":0.4560000002384186},{"id":"https://openalex.org/keywords/astrochemistry","display_name":"astrochemistry","score":0.4410000145435333}],"concepts":[{"id":"https://openalex.org/C83581075","wikidata":"https://www.wikidata.org/wiki/Q1361503","display_name":"Excitation","level":2,"score":0.7175999879837036},{"id":"https://openalex.org/C184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","level":1,"score":0.6873999834060669},{"id":"https://openalex.org/C65155139","wikidata":"https://www.wikidata.org/wiki/Q5380912","display_name":"Envelope (radar)","level":3,"score":0.579800009727478},{"id":"https://openalex.org/C169146920","wikidata":"https://www.wikidata.org/wiki/Q2140940","display_name":"Rotational energy","level":2,"score":0.47699999809265137},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.46630001068115234},{"id":"https://openalex.org/C186647298","wikidata":"https://www.wikidata.org/wiki/Q2074917","display_name":"Inelastic collision","level":3,"score":0.43619999289512634},{"id":"https://openalex.org/C16951817","wikidata":"https://www.wikidata.org/wiki/Q7370327","display_name":"Rotational temperature","level":3,"score":0.42579999566078186},{"id":"https://openalex.org/C142199849","wikidata":"https://www.wikidata.org/wiki/Q3027672","display_name":"Inelastic scattering","level":3,"score":0.3869999945163727},{"id":"https://openalex.org/C204530211","wikidata":"https://www.wikidata.org/wiki/Q752823","display_name":"Thermal","level":2,"score":0.3709000051021576},{"id":"https://openalex.org/C191486275","wikidata":"https://www.wikidata.org/wiki/Q210028","display_name":"Scattering","level":2,"score":0.3671000003814697},{"id":"https://openalex.org/C84114770","wikidata":"https://www.wikidata.org/wiki/Q46344","display_name":"Quantum","level":2,"score":0.364300012588501},{"id":"https://openalex.org/C2781219984","wikidata":"https://www.wikidata.org/wiki/Q1043814","display_name":"Collisional excitation","level":4,"score":0.34360000491142273},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.34279999136924744},{"id":"https://openalex.org/C181500209","wikidata":"https://www.wikidata.org/wiki/Q215328","display_name":"Excited state","level":2,"score":0.32030001282691956},{"id":"https://openalex.org/C75303097","wikidata":"https://www.wikidata.org/wiki/Q7370325","display_name":"Rotational partition function","level":4,"score":0.30709999799728394},{"id":"https://openalex.org/C125245961","wikidata":"https://www.wikidata.org/wiki/Q221656","display_name":"Brightness","level":2,"score":0.3068999946117401},{"id":"https://openalex.org/C139210041","wikidata":"https://www.wikidata.org/wiki/Q2145840","display_name":"Resonance (particle physics)","level":2,"score":0.30379998683929443},{"id":"https://openalex.org/C111167017","wikidata":"https://www.wikidata.org/wiki/Q3997523","display_name":"Rotational transition","level":3,"score":0.30250000953674316},{"id":"https://openalex.org/C125277925","wikidata":"https://www.wikidata.org/wiki/Q2572687","display_name":"Potential energy surface","level":3,"score":0.29829999804496765},{"id":"https://openalex.org/C186370098","wikidata":"https://www.wikidata.org/wiki/Q442787","display_name":"Energy (signal processing)","level":2,"score":0.2824999988079071},{"id":"https://openalex.org/C49304495","wikidata":"https://www.wikidata.org/wiki/Q49393","display_name":"Projectile","level":2,"score":0.28220000863075256},{"id":"https://openalex.org/C84551667","wikidata":"https://www.wikidata.org/wiki/Q155640","display_name":"Potential energy","level":2,"score":0.2782999873161316},{"id":"https://openalex.org/C30475298","wikidata":"https://www.wikidata.org/wiki/Q909554","display_name":"Computational physics","level":1,"score":0.2637999951839447},{"id":"https://openalex.org/C96141758","wikidata":"https://www.wikidata.org/wiki/Q216817","display_name":"Emission spectrum","level":3,"score":0.25850000977516174}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2610.06525","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2610.06525","pdf_url":"https://arxiv.org/pdf/2610.06525","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":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2610.06525","doi":"https://doi.org/10.48550/arxiv.2610.06525","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2610.06525","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:2610.06525","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2610.06525","pdf_url":"https://arxiv.org/pdf/2610.06525","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":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7220739824.pdf","grobid_xml":"https://content.openalex.org/works/W7220739824.grobid-xml"},"referenced_works_count":35,"referenced_works":["https://openalex.org/W1668503314","https://openalex.org/W1845598228","https://openalex.org/W1966982093","https://openalex.org/W1984268956","https://openalex.org/W1990625030","https://openalex.org/W2000193505","https://openalex.org/W2002854348","https://openalex.org/W2007168050","https://openalex.org/W2025401061","https://openalex.org/W2032039788","https://openalex.org/W2062861231","https://openalex.org/W2064139519","https://openalex.org/W2064637466","https://openalex.org/W2069676995","https://openalex.org/W2072333809","https://openalex.org/W2072553895","https://openalex.org/W2101788307","https://openalex.org/W2114067747","https://openalex.org/W2131186501","https://openalex.org/W2148941593","https://openalex.org/W2293117269","https://openalex.org/W2757506591","https://openalex.org/W2794422790","https://openalex.org/W2901864449","https://openalex.org/W3016269451","https://openalex.org/W3084447916","https://openalex.org/W4309601861","https://openalex.org/W4392968890","https://openalex.org/W4407803217","https://openalex.org/W4412531304","https://openalex.org/W4413011380","https://openalex.org/W4416816581","https://openalex.org/W7160499428","https://openalex.org/W7205016042","https://openalex.org/W7206214365"],"related_works":["https://openalex.org/W7160862628","https://openalex.org/W7160499428","https://openalex.org/W4392968890","https://openalex.org/W4416816581","https://openalex.org/W4415731992","https://openalex.org/W4413761179","https://openalex.org/W4380884382","https://openalex.org/W2763747018","https://openalex.org/W2944553991","https://openalex.org/W2811045084"],"abstract_inverted_index":{"Rotational":[0],"transitions":[1,133,152],"of":[2,94,108,142,149,165,183,195,208,213],"SiC$_6$":[3,16,29],"with":[4,17,203,217],"$j=26$--$40$":[5],"have":[6],"been":[7],"detected":[8],"in":[9],"IRC+10216,":[10],"but":[11],"collisional":[12],"rate":[13,26,84,100,168],"coefficients":[14,27,85,101,169],"for":[15,28,55,66,111,130,146,154,173],"He":[18],"or":[19],"H$_2$":[20],"were":[21,53,71,80],"previously":[22],"unavailable.":[23],"We":[24,161],"present":[25],"rotational":[30,57,87],"excitation":[31,126],"by":[32,103,117],"He,":[33],"calculated":[34],"using":[35],"a":[36,106,193],"two-dimensional":[37],"potential":[38],"energy":[39],"surface":[40],"(PES)":[41],"at":[42],"the":[43,47,60,131,140,143,150,166,177,184,204,211],"RCCSD(T)-F12":[44],"level":[45],"under":[46],"rigid-rotor":[48],"approximation.":[49],"Close-coupling":[50],"(CC)":[51],"calculations":[52,157],"performed":[54],"low":[56],"levels,":[58],"while":[59],"coupled-states":[61],"(CS)":[62],"method":[63,145],"was":[64],"used":[65],"higher":[67],"levels.":[68],"Convergence":[69],"tests":[70],"conducted,":[72],"and":[73,75,92,98,120,127,175,197],"CC":[74,97,156],"CS":[76,83,99,144],"scattering":[77],"cross":[78],"sections":[79],"compared.":[81],"The":[82,199],"cover":[86],"levels":[88],"up":[89,104],"to":[90,105,170],"$j=40$":[91],"temperatures":[93,129],"3--60\\,K.":[95],"Although":[96],"differ":[102],"factor":[107],"$\\sim":[109],"2$":[110],"some":[112],"transitions,":[113],"particularly":[114],"those":[115,172],"affected":[116],"weak":[118],"coupling":[119],"resonances,":[121],"they":[122],"yield":[123],"nearly":[124],"identical":[125],"brightness":[128],"high-$j$":[132,151],"examined,":[134],"including":[135],"$19\\rightarrow18$.":[136],"These":[137],"results":[138],"support":[139],"reliability":[141],"non-LTE":[147,215],"modelling":[148,216],"considered,":[153],"which":[155],"are":[158],"computationally":[159],"impractical.":[160],"use":[162],"reduced-mass":[163],"scaling":[164],"SiC$_6$--He":[167],"estimate":[171,207],"SiC$_6$--H$_2$":[174],"model":[176],"observed":[178,185],"transitions.":[179],"A":[180],"$\u03c7^2$":[181],"analysis":[182],"line":[186],"fluxes,":[187],"excluding":[188],"heavily":[189],"blended":[190],"features,":[191],"yields":[192],"best-fitting":[194],"$n(\\mathrm{H_2})=4.33\\times10^5$\\,cm$^{-3}$":[196],"$N(\\mathrm{SiC_6})=8.11\\times10^{11}$\\,cm$^{-2}$.":[198],"latter":[200],"agrees":[201],"excellently":[202],"previous":[205],"observational":[206,218],"$(7.9\\pm1.5)\\times10^{11}$\\,cm$^{-2}$,":[209],"supporting":[210],"consistency":[212],"our":[214],"constraints.":[219]},"counts_by_year":[],"updated_date":"2026-11-08T12:12:28.789561","created_date":"2026-10-07T00:00:00"}
