J/ApJ/704/964: Resource Record Summary

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Spectroscopic study of Of^+^ supergiants

Short name: J/ApJ/704/964 IVOA Identifier: ivo://CDS.VizieR/J/ApJ/704/964 DOI (Digital Object Identifier): 10.26093/cds/vizier.17040964 Publisher: CDS[+]ivo://CDS[Pub. ID] More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/704/964 VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2011 Dec 08 15:15:57Z
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Description

The transition from early Of stars to WN-type objects is poorly understood. O-type supergiants with emission lines (OIf^+^) are considered to be intermediate between these two classes. The scope of this paper is to investigate the spectral variability of three Of^+^ supergiants. We constituted spectral time series of unprecedented quality for our targets (~200 spectra in total), essentially in the blue domain, covering timescales from a few hours up to a few years. Temporal Variance Spectrum and Fourier analyses were performed in order to characterize their spectral variability.

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