N. Fabas
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View article: Science cases for a visible interferometer
Science cases for a visible interferometer Open
High spatial resolution is the key for the understanding various astrophysical phenomena. But even with the future E-ELT, single dish instruments are limited to a spatial resolution of about 4 mas in the visible. For the closest objects wi…
View article: Discovery of a complex linearly polarized spectrum of Betelgeuse dominated by depolarization of the continuum
Discovery of a complex linearly polarized spectrum of Betelgeuse dominated by depolarization of the continuum Open
Context. Betelgeuse is an M supergiant that harbors spots and giant granules at its surface and presents linear polarization of its continuum. Aims. We have previously discovered linear polarization signatures associated with individual li…
View article: A helium P-Cygni profile in RR Lyrae stars?
A helium P-Cygni profile in RR Lyrae stars? Open
\n Context. Until 2006, helium emission lines had never been observed in RR Lyrae stars. For the first time, a pre-maximum helium emission in 11 RRab stars was observed during rising light (around the pulsation phase 0.92) and the reappear…