Three Stages in Evolution of the Object Th4-4

Lyudmila Kondratyeva; Eduard Denissyuk; Saule Shomshekova; Inna Reva; Gauhar Aimanova; Maxim Krugov

doi:10.3390/galaxies13010005

Galaxies (Jan 2025)

Three Stages in Evolution of the Object Th4-4

Lyudmila Kondratyeva,
Eduard Denissyuk,
Saule Shomshekova,
Inna Reva,
Gauhar Aimanova,
Maxim Krugov

Affiliations

Lyudmila Kondratyeva: Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
Eduard Denissyuk: Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
Saule Shomshekova: Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
Inna Reva: Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
Gauhar Aimanova: Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
Maxim Krugov: Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan

DOI: https://doi.org/10.3390/galaxies13010005
Journal volume & issue: Vol. 13, no. 1
p. 5

Abstract

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The results of observations of the object Th4-4 in 1970–2024 showed that during this period the object went through several stages, when its characteristics corresponded to different classes of objects: Be star, symbiotic star and planetary nebula. Currently, the object appears to be a low-excitation planetary nebula.

Published in Galaxies

ISSN: 2075-4434 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Astronomy
Website: http://www.mdpi.com/journal/galaxies

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