A New Activity Cycle of V1413 Aql

V1413 Aql is an anomalous classical symbiotic star that has remained in an active state almost continuously. After failing to return to quiescence following the 2020 outburst, it underwent a new flare in 2025. We present an analysis of new photometric and spectroscopic observations, which provide estimates for the binary components at different stages of activity: Lcool=1700L⊙, Rcool=130R⊙; Lhot=800L⊙, Rhot=28R⊙ during minimum; Lhot=7000L⊙, Rhot=64R⊙ at the 2025 maximum. The significant increase in the luminosity of the hot component during the 2025 outburst deviates from the typical behavior observed in classical symbiotic stars, where outbursts are generally attributed to a redistribution of spectral energy rather than intrinsic changes in luminosity.

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Publication Details

Journal
Galaxies
Published
2025-08-04
DOI
https://doi.org/10.3390/galaxies13040086
Primary Topic
Stellar, planetary, and galactic studies
Type
article
Field-Weighted Citation Impact
0.00

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article

A New Activity Cycle of V1413 Aql

N. A. Maslennikova, Natalia Ikonnikova, А. М. Татарников, М. А. Бурлак et al.
Galaxies
Stellar, planetary, and galactic studies
article

A New Activity Cycle of V1413 Aql

N. A. Maslennikova, Natalia Ikonnikova, А. М. Татарников, М. А. Бурлак, A. Belinski, А. В. Додин, G. E. Nikishev, Anna Tatarnikova
article en

Abstract

V1413 Aql is an anomalous classical symbiotic star that has remained in an active state almost continuously. After failing to return to quiescence following the 2020 outburst, it underwent a new flare in 2025. We present an analysis of new photometric and spectroscopic observations, which provide estimates for the binary components at different stages of activity: Lcool=1700L⊙, Rcool=130R⊙; Lhot=800L⊙, Rhot=28R⊙ during minimum; Lhot=7000L⊙, Rhot=64R⊙ at the 2025 maximum. The significant increase in the luminosity of the hot component during the 2025 outburst deviates from the typical behavior observed in classical symbiotic stars, where outbursts are generally attributed to a redistribution of spectral energy rather than intrinsic changes in luminosity.

GalaxiesVol. 13(4)
Lomonosov Moscow State University (RU)
National Aeronautics and Space Administration, Russian Science Foundation, Lomonosov Moscow State University
Affordable and clean energy
Openalex Percentile: Top 85%
Stellar, planetary, and galactic studies
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A New Activity Cycle of V1413 Aql — N. A. Maslennikova, Natalia Ikonnikova, et al. · Galaxies (2025) | TGRS Research Map | TGRS