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The OBAFGKM spectral class sequence, Johannes D. Clausen

The OBAFGKM spectral class sequence

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The OBAFGKM spectral class sequence, Johannes D. Clausen

The OBAFGKM spectral class sequence

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Description

Spectra of 7 bright stars covering the OBAFGKM spectral type sequence.

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The seven spectra were captured using the super-simple slitless spectrograph setup shown below consisting of a 135 mm Samyang prime lens, a Paton Hawksley 100 lines/mm 35x24 mm aperture diffraction grating slide placed in front of the lens (objective grating configuration), and a ZWO ASI290MM mini camera. The spectra were analyzed using the RSpec software package and are shown corrected for the instrument response, highlighting the shift in intensity from blue to red going from high to low stellar surface temperature. Selected major absorption lines are indicated.

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The individual spectra with detailed annotation can be found here: https://groups.io/g/RSpec-Astronomy/topic/objective_grating/88473066

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The OBAFGKM spectral class sequence, Johannes D. Clausen

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Spectroscopy
Samyang 135 f/2