CCD images and long-slit spectroscopy of the ring nebula around θ Mus

We present the first digital CCD images and long-slit spectroscopy of the optical ring nebula around the Wolf-Rayet star θ Mus. The CCD images obtained through narrow-band filters centred at [O III] and Hα show that the nebula has a filamentary structure, similar to supernova remnants, mainly seen i...

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Guardado en:
Detalles Bibliográficos
Publicado: 1998
Materias:
ISM: bubbles
Stars: individual: HD 113904
Stars: Wolf-Rayet
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v297_n4_p1060_DeCastro
http://hdl.handle.net/20.500.12110/paper_00358711_v297_n4_p1060_DeCastro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00358711_v297_n4_p1060_DeCastro
record_format dspace
spelling paper:paper_00358711_v297_n4_p1060_DeCastro2023-06-08T15:01:16Z CCD images and long-slit spectroscopy of the ring nebula around θ Mus ISM: bubbles Stars: individual: HD 113904 Stars: Wolf-Rayet We present the first digital CCD images and long-slit spectroscopy of the optical ring nebula around the Wolf-Rayet star θ Mus. The CCD images obtained through narrow-band filters centred at [O III] and Hα show that the nebula has a filamentary structure, similar to supernova remnants, mainly seen in [O III]. A spatial detachment between [O III] and Ha images suggests excitation stratification, or multiple rings. An analysis of the physical conditions in the nebula was performed by means of long-slit CCD spectra. The spectral images show that the nebula is of low density and medium excitation. By means of quotients of recombination and collisional spectral line fluxes we determine that the principal excitation mechanism is photoionization. We have determined the electronic temperature and density, and chemical abundances for the oxygen at different sites within the nebula. Nebular chemical abundances are found to be similar to the Galactic ISM, indicating that the nebula is mainly composed of swept up material. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v297_n4_p1060_DeCastro http://hdl.handle.net/20.500.12110/paper_00358711_v297_n4_p1060_DeCastro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic ISM: bubbles
Stars: individual: HD 113904
Stars: Wolf-Rayet
spellingShingle ISM: bubbles
Stars: individual: HD 113904
Stars: Wolf-Rayet
CCD images and long-slit spectroscopy of the ring nebula around θ Mus
topic_facet ISM: bubbles
Stars: individual: HD 113904
Stars: Wolf-Rayet
description We present the first digital CCD images and long-slit spectroscopy of the optical ring nebula around the Wolf-Rayet star θ Mus. The CCD images obtained through narrow-band filters centred at [O III] and Hα show that the nebula has a filamentary structure, similar to supernova remnants, mainly seen in [O III]. A spatial detachment between [O III] and Ha images suggests excitation stratification, or multiple rings. An analysis of the physical conditions in the nebula was performed by means of long-slit CCD spectra. The spectral images show that the nebula is of low density and medium excitation. By means of quotients of recombination and collisional spectral line fluxes we determine that the principal excitation mechanism is photoionization. We have determined the electronic temperature and density, and chemical abundances for the oxygen at different sites within the nebula. Nebular chemical abundances are found to be similar to the Galactic ISM, indicating that the nebula is mainly composed of swept up material.
title CCD images and long-slit spectroscopy of the ring nebula around θ Mus
title_short CCD images and long-slit spectroscopy of the ring nebula around θ Mus
title_full CCD images and long-slit spectroscopy of the ring nebula around θ Mus
title_fullStr CCD images and long-slit spectroscopy of the ring nebula around θ Mus
title_full_unstemmed CCD images and long-slit spectroscopy of the ring nebula around θ Mus
title_sort ccd images and long-slit spectroscopy of the ring nebula around θ mus
publishDate 1998
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v297_n4_p1060_DeCastro
http://hdl.handle.net/20.500.12110/paper_00358711_v297_n4_p1060_DeCastro
_version_ 1768543599257976832

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