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dc.contributor.authorMathew, B-
dc.contributor.authorManoj, P-
dc.contributor.authorNarang, Mayank-
dc.contributor.authorBanerjee, D. P. K-
dc.contributor.authorPratheeksha Nayak-
dc.contributor.authorMuneer, S-
dc.contributor.authorVig, S-
dc.contributor.authorKumar, S. P-
dc.contributor.authorPaul, K. T-
dc.contributor.authorMaheswar, G-
dc.identifier.citationThe Astrophysical Journal, Vol. 857, No. 1, 30en_US
dc.descriptionRestricted Accessen_US
dc.description.abstractWe have investigated the role of a few prominent excitation mechanisms viz. collisional excitation, recombination, continuum fluorescence, and Lyman beta fluorescence on the O i line spectra in Herbig Ae/Be stars. The aim is to understand which of them is the central mechanism that explains the observed O i line strengths. The study is based on an analysis of the observed optical spectra of 62 Herbig Ae/Be stars and near-infrared spectra of 17 Herbig Ae/Be stars. The strong correlation observed between the line fluxes of O i λ8446 and O i λ11287, as well as a high positive correlation between the line strengths of O i λ8446 and Hα suggest that Lyman beta fluorescence is the dominant excitation mechanism for the formation of O i emission lines in Herbig Ae/Be stars. Furthermore, from an analysis of the emission line fluxes of O i λλ7774, 8446, and comparing the line ratios with those predicted by theoretical models, we assessed the contribution of collisional excitation in the formation of O i emission lines.en_US
dc.publisherIOP Publishingen_US
dc.rights© The American Astronomical Society-
dc.subjectCircumstellar matteren_US
dc.subjectInfrared: starsen_US
dc.subjectStars: pre-main sequenceen_US
dc.subjectStars: variables: T Tauri, Herbig Ae/Been_US
dc.subjectTechniques: spectroscopicen_US
dc.titleExcitation Mechanism of O i Lines in Herbig Ae/Be Starsen_US
Appears in Collections:IIAP Publications

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