Spectroscopic and Photometric Study of the Asymptotic Giant Branch Star T Cephei

Volume 51 number 2 (2023)

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David Boyd

West Challow Observatory, OX12 9TX, UK; davidboyd@orion.me.uk

Abstract

Spectroscopy and photometry of the Asymptotic Giant Branch star T Cephei were recorded concurrently on 36 nights during its 387-day pulsation cycle in 2022. Photometry was used to calibrate all spectra in absolute flux. We report on the variation of B and V magnitudes, B–V color index, spectral type, effective temperature, and Balmer emission line flux during one complete pulsation cycle.