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Individual sheet: HD190603
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Spectral type(s): B1.5Ia
Multiplicity:
Undetermined, lack of dedicated study
Period(s): undetermined
Orbital solution: no
Ref: Benaglia (2010)
Comments:
It is most probably a transition object on the way to a LBV-like phase (Clark et al. 2012). Its almost flat spectral index is most likely explained by optically thin thermal thermal radio emission, as in the case of other evolved/transition massive stars.