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dc.contributor.author
Chang, Seok Jun
dc.contributor.author
Lee, Hee Won
dc.contributor.author
Ahn, Sang Hyeon
dc.contributor.author
Lee, Hogyu
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Angeloni, Rodolfo
dc.contributor.author
Palma, Tali
dc.contributor.author
Di Mille, Francesco
dc.date.available
2021-06-02T22:21:24Z
dc.date.issued
2018-02
dc.identifier.citation
Chang, Seok Jun; Lee, Hee Won; Ahn, Sang Hyeon; Lee, Hogyu; Angeloni, Rodolfo; et al.; Escape of resonantly scattered LYβ and Hα from hot and optically thick media; Korean Astronomical Society; Journal Of The Korean Astronomical Society; 51; 1; 2-2018; 5-16
dc.identifier.issn
1225-4614
dc.identifier.uri
http://hdl.handle.net/11336/133041
dc.description.abstract
We investigate the escape of Lyβ from emission nebulae with a significant population of excited hydrogen atoms in the level n = 2, rendering them optically thick in Hα. The transfer of Lyβ line photons in these optically thick regions is complicated by the presence of another scattering channel leading to re-emission of Hα, alternating their identities between Lyβ and Hα. In this work, we develop a Monte Carlo code to simulate the transfer of Lyβ line photons incorporating the scattering channel into Hα. Both Hα and Lyβ lines are formed through diffusion in frequency space, where a line photon enters the wing regime after a fairly large number of resonance scatterings with hydrogen atoms. Various line profiles of Hα and Lyβ emergent from our model nebulae are presented. It is argued that the electron temperature is a critical parameter which controls the flux ratio of emergent Lyβ and Hα. Specifically for T = 3×104 K and Hα line center optical depth τα = 10, the number flux ratio of emergent Lyβ and Hα is ∼ 49 percent, which is quite significant. We propose that the leaking Lyβ can be an interesting source for the formation of Hα wings observed in many symbiotic stars and active galactic nuclei. Similar broad Hα wings are also expected in Lyα emitting halos found in the early universe, which can be potentially probed by the James Webb Telescope in the future.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Korean Astronomical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
LINE: FORMATION
dc.subject
LINE: PROFILES
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RADIATIVE TRANSFER
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SCATTERING
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Escape of resonantly scattered LYβ and Hα from hot and optically thick media
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-06-02T12:15:08Z
dc.identifier.eissn
2288-890X
dc.journal.volume
51
dc.journal.number
1
dc.journal.pagination
5-16
dc.journal.pais
Corea del Sur
dc.description.fil
Fil: Chang, Seok Jun. Universidad de Sejong; Corea del Sur
dc.description.fil
Fil: Lee, Hee Won. Universidad de Sejong; Corea del Sur
dc.description.fil
Fil: Ahn, Sang Hyeon. Korea Astronomy And Space Science Institute; Corea del Sur
dc.description.fil
Fil: Lee, Hogyu. Korea Astronomy And Space Science Institute; Corea del Sur
dc.description.fil
Fil: Angeloni, Rodolfo. Universidad de La Serena; Chile
dc.description.fil
Fil: Palma, Tali. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Di Mille, Francesco. Observatorio Las Campanas; Chile
dc.journal.title
Journal Of The Korean Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://koreascience.or.kr/article/JAKO201809951099192.page
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5303/JKAS.2018.51.1.5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1802.03892
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