Open AccessThe spectra of WC9 stars: evolution and dust formation★
Author(s) -
P. M. Williams,
P. A. Crowther,
K. A. van der Hucht
Publication year - 2015
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-8711
pISSN - 0035-8711
DOI - 10.1093/mnras/stv409
Subject(s) - physics , stars , astrophysics , spectral line , astronomy , stellar evolution
We present analyses of new optical spectra of three WC9 stars, WR 88, WR 92 and WR 103 to test the suggestion that they exemplify an evolutionary sequence amongst the WC9 stars. The spectrum of WR 88 shows conspicuous lines of N iii and N iv, leading to classification as a transitional WN8o/WC9 star. The three stars show a sequence of increasing O ii and O iii line strengths, confirming and extend...
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