Be stars

Be stars

Be stars Recommended equipment : Lhires III, eShel, Lisa, Alpy Time : one evening to a life time ! Abstract Classical Be stars are non supergiant B-type stars that exhibit or have exhibit emission lines over the photospheric spectrum. This article review common...
Beta Aurigae spectroscopic binary

Beta Aurigae spectroscopic binary

Beta Aurigae spectroscopic binary Recommended equipment : Lhires III, eShel Time : several observing nights Summary Grâce à la haute résolution du Lhires III, il est possible de séparer de nombreuses étoiles binaires spectroscopiques. Ces étoiles, qui...
Measure star temperature

Measure star temperature

Measure star temperature Recommended equipment : Lhires III, eShel, Lisa, Alpy, Star Analyser Time : 4h French philosopher Auguste Compte (1798-1857) became very famous when he wrote in 1835 about stars: “… we will never know, by any mean, chemical...
Spectral classification (high resolution)

Spectral classification (high resolution)

Spectral classification (high resolution) Recommended equipment : Lhires III, eShel Durée : 1 night Introduction Low resolution spectroscopy allows to classify stars and measure their effective temperature. But this method is limited and hgih resolution spectroscopy...
Solar spectrum (visual)

Solar spectrum (visual)

Solar spectrum (visual) Recommended equipment: Lhires III, Lhires Lite Time: 1h It works every time: anyone watching the solar spectra in hig resolution enjoy it -it is magical! and it’s easy: you just have to direct the Lhires III, without a telescope, directly...