V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary
In 2019, the classical nova V1047 Cen experienced an unusual outburst, the nature of which has not yet been clearly determined. In this paper, we show that the 2019 V1047 Cen outburst is of Z And-type—a type that is characteristic of and has so far been observed only in symbiotic binaries. We suppor...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adc0f6 |
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| author | Augustin Skopal Natalia Shagatova |
| author_facet | Augustin Skopal Natalia Shagatova |
| author_sort | Augustin Skopal |
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| description | In 2019, the classical nova V1047 Cen experienced an unusual outburst, the nature of which has not yet been clearly determined. In this paper, we show that the 2019 V1047 Cen outburst is of Z And-type—a type that is characteristic of and has so far been observed only in symbiotic binaries. We support our claim by modeling the near-ultraviolet to near-infrared spectral energy distribution, which revealed a close similarity between the fundamental parameters and the mass-loss rate of the burning white dwarf (WD) during the 2019 V1047 Cen outburst and those measured during Z And-type outbursts in symbiotic stars. All parameters are in good agreement with the theoretical prediction when the accretion rate exceeds the stable burning limit for WDs with masses ≲0.7 M _⊙ . Our analysis showed that after a nova explosion, the Z And-type outburst can occur not only in symbiotic binaries, but also in short-period cataclysmic variables, when the accretion-powered system changes to a nuclear-powered one as a consequence of the donor’s reaction to the nova explosion. Such a development promotes the production of Type Ia supernovae. |
| format | Article |
| id | doaj-art-71bef64c2dde430fa42ea8fa5e069fd5 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| spelling | doaj-art-71bef64c2dde430fa42ea8fa5e069fd52025-08-20T02:17:33ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01983214810.3847/1538-4357/adc0f6V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova BinaryAugustin Skopal0https://orcid.org/0000-0002-8312-3326Natalia Shagatova1https://orcid.org/0000-0002-1218-8296Astronomical Institute , Slovak Academy of Sciences, 059 60 Tatranská Lomnica, SlovakiaAstronomical Institute , Slovak Academy of Sciences, 059 60 Tatranská Lomnica, SlovakiaIn 2019, the classical nova V1047 Cen experienced an unusual outburst, the nature of which has not yet been clearly determined. In this paper, we show that the 2019 V1047 Cen outburst is of Z And-type—a type that is characteristic of and has so far been observed only in symbiotic binaries. We support our claim by modeling the near-ultraviolet to near-infrared spectral energy distribution, which revealed a close similarity between the fundamental parameters and the mass-loss rate of the burning white dwarf (WD) during the 2019 V1047 Cen outburst and those measured during Z And-type outbursts in symbiotic stars. All parameters are in good agreement with the theoretical prediction when the accretion rate exceeds the stable burning limit for WDs with masses ≲0.7 M _⊙ . Our analysis showed that after a nova explosion, the Z And-type outburst can occur not only in symbiotic binaries, but also in short-period cataclysmic variables, when the accretion-powered system changes to a nuclear-powered one as a consequence of the donor’s reaction to the nova explosion. Such a development promotes the production of Type Ia supernovae.https://doi.org/10.3847/1538-4357/adc0f6Cataclysmic variable starsClassical novaeSymbiotic binary stars |
| spellingShingle | Augustin Skopal Natalia Shagatova V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary The Astrophysical Journal Cataclysmic variable stars Classical novae Symbiotic binary stars |
| title | V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary |
| title_full | V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary |
| title_fullStr | V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary |
| title_full_unstemmed | V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary |
| title_short | V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary |
| title_sort | v1047 cen the first z and type outburst observed in the classical nova binary |
| topic | Cataclysmic variable stars Classical novae Symbiotic binary stars |
| url | https://doi.org/10.3847/1538-4357/adc0f6 |
| work_keys_str_mv | AT augustinskopal v1047centhefirstzandtypeoutburstobservedintheclassicalnovabinary AT nataliashagatova v1047centhefirstzandtypeoutburstobservedintheclassicalnovabinary |