Long term UBV RI photometric and spectral monitoring of nova KT Eri during 2009-2023

2024/11/28 by S. Yu. Shugarov, Shugarov, S. Yu., P. Golysheva +5
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysical Phenomena and Observations #FOS: Physical sciences #Gamma-ray bursts and supernovae #Solar and Stellar Astrophysics (astro-ph.SR)

paper · pdf · doi:10.48550/arxiv.2411.19348

openalex publication_date 2024/11/28 · openalex created_date 2024/12/05 · openalex updated_date 2026/07/28

Abstract

We present a status report of our intensive and long-term UBV RI photometric monitoring of nova KT Eri since its outbust in 2009. The old-nova in quiescence is characterized by very high excitation conditions (HeII 4686 being constantly the strongest emission line in optical spectra) and a complex-pattern photometric variability of one mag amplitude in which multi-periodicities (from hours to years) are mixed with chaotic activity of similar amplitude. Mean color and brightness levels are the same for pre- and post- outburst quiescence.

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