Line formation regions of the UV spectrum of CI Cygni

<i>Aims.</i> They are the interpretation of the emission line formation regions in CI Cygni. <i>Methods.</i> They involve the examination of radial velocities and fluxes of ultraviolet emission lines at different epochs, deduced from archival IUE and GRHS/HST spectra. <i...

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Detalles Bibliográficos
Autores principales:	Mikolajewska, Joanna, Friedjung, Michael, Quiroga, Claudio Hugo Martín
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2006
Materias:	Ciencias Astronómicas Stars: binaries: symbiotic Stars: fundamental parameters Stars: mass-loss Stars: individual: CI Cyg Line: profiles
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/123576
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-123576
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas Stars: binaries: symbiotic Stars: fundamental parameters Stars: mass-loss Stars: individual: CI Cyg Line: profiles
spellingShingle	Ciencias Astronómicas Stars: binaries: symbiotic Stars: fundamental parameters Stars: mass-loss Stars: individual: CI Cyg Line: profiles Mikolajewska, Joanna Friedjung, Michael Quiroga, Claudio Hugo Martín Line formation regions of the UV spectrum of CI Cygni
topic_facet	Ciencias Astronómicas Stars: binaries: symbiotic Stars: fundamental parameters Stars: mass-loss Stars: individual: CI Cyg Line: profiles
description	<i>Aims.</i> They are the interpretation of the emission line formation regions in CI Cygni. <i>Methods.</i> They involve the examination of radial velocities and fluxes of ultraviolet emission lines at different epochs, deduced from archival IUE and GRHS/HST spectra. <i>Results.</i> The line fluxes give electron densities and were in addition used to calculate emission measures, suggesting line formation in regions rather smaller than the binary separation. Examination of the radial velocities led to us to find a systematic redshift of the high ionization resonance lines with respect to the intercombination, and He ii lines. Possible explanations of the redshift and the high resolution GHRS C iv profile are discussed. We favour that involving resonance line absorption by a circum-binary region most probably in an asymmetric wind interaction shell or in a wind from the accretion disk.
format	Articulo Articulo
author	Mikolajewska, Joanna Friedjung, Michael Quiroga, Claudio Hugo Martín
author_facet	Mikolajewska, Joanna Friedjung, Michael Quiroga, Claudio Hugo Martín
author_sort	Mikolajewska, Joanna
title	Line formation regions of the UV spectrum of CI Cygni
title_short	Line formation regions of the UV spectrum of CI Cygni
title_full	Line formation regions of the UV spectrum of CI Cygni
title_fullStr	Line formation regions of the UV spectrum of CI Cygni
title_full_unstemmed	Line formation regions of the UV spectrum of CI Cygni
title_sort	line formation regions of the uv spectrum of ci cygni
publishDate	2006
url	http://sedici.unlp.edu.ar/handle/10915/123576
work_keys_str_mv	AT mikolajewskajoanna lineformationregionsoftheuvspectrumofcicygni AT friedjungmichael lineformationregionsoftheuvspectrumofcicygni AT quirogaclaudiohugomartin lineformationregionsoftheuvspectrumofcicygni
bdutipo_str	Repositorios
_version_	1764820449809661953

Line formation regions of the UV spectrum of CI Cygni

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