CH Cygni in 2004 – II: Nebular spectrum features |
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| Institution: | 1. School of Innovation, Design and Engineering, Malardalen University, Sweden;3. Hanken School of Economics, Helsinki, Finland;4. SAVEGGY AB, Ideon Innovation, Ideon Science Park, Lund, Sweden;5. Division of Marketing and Strategy, School of Business Society and Engineering, Malardalen University, Sweden;6. Department of Management and Operations, Bartley Hall Rm 2067, 800 Lancaster Avenue, Villanova, PA 19085, USA |
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| Abstract: | We report in a series on the spectra of CH Cygni obtained in October 2004 in this paper. The spectra showed emission lines of H I, O I], O III], N II], Ne III] and Fe II: most of them became stronger than those obtained in April 2004. In order to retrieve the intrinsic emission profile, we removed the underlying M-type spectrum and telluric lines of O2 from the spectra. Then, we deconvoluted the resulting Hα and O III] profiles into several Gaussian functions. Radial velocities of all lines observed in October 2004 were measured.Results are compared with those in April 2004, and are discussed by way of an accretion disk and a circumstellar model. |
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