English

Is the Symbiotic Recurrent Nova T CrB Late? Recent Photometric Evolution and Comparison with Past Pre-Outburst Behaviour

Solar and Stellar Astrophysics 2025-05-09 v2 High Energy Astrophysical Phenomena

Abstract

T CrB is a symbiotic recurrent nova that last erupted in 1946. Given its recurrence timescale of approximately 80 years, the next outburst is eagerly anticipated by the astronomical community. In this work, we analyse the optical light curves of T CrB, comparing recent photometric evolution with historical data to evaluate potential predictive indicators of nova eruptions. Although the "super-active" phases preceding both the 1946 and anticipated eruptions are strikingly similar, the subsequent photometric behaviour differs. We find that the decline in brightness observed in 2023, interpreted by some as a "pre-eruption dip", deviates from the deep minimum recorded prior to the 1946 event and does not reliably predict the eruption timing. Recent photometric and spectroscopic observations indicate that the system is returning to a high-accretion state. Given this, an eruption may be imminent, even without distinct precursors. While the next eruption of T CrB will be a major scientific event, its expected peak brightness of V2V \sim 2 mag highlights the importance of setting realistic public expectations for what will be a visually modest, yet astrophysically very significant, celestial event.

Keywords

Cite

@article{arxiv.2504.20592,
  title  = {Is the Symbiotic Recurrent Nova T CrB Late? Recent Photometric Evolution and Comparison with Past Pre-Outburst Behaviour},
  author = {Jaroslav Merc and Łukasz Wyrzykowski and Paul G. Beck and Przemysław J. Mikołajczyk and Krzysztof Kotysz and Paweł Zieliński and Staszek Zola and Sebastian Kurowski and Waldemar Ogłoza and Marek Drozdz and Charles Galdies and Franz-Josef Hambsch and Stephen M. Brincat and Barbara Joachimczyk and Mateusz Bronikowski and Jure Japelj and Matej Mihelcic and Josep Manel Carrasco and Umut Burgaz and Agnieszka Gurgul and Karolina Bąkowska and Piotr Hofbauer and Krzysztof Szyszka and Jan Golonka and Jan Kåre Trandem Qvam and Justas Zdanavičius and Erika Pakštienė and Marius Maskoliūnas and Vytautas Čepas and Uliana Pylypenko and Dawid Moździerski and Franky Dubois and Siegfried Vanaverbeke and Justyna M. Olszewska and Alexios Liakos and Milan Stojanović and Goran Damljanović and Adam Popowicz and Mateusz Marzec and Magdalena Badura and Bartosz Gil and Alicja Pucek and Aleksandra Kowalska and Mateusz Szklarz and Teimuraz Kvernadze and Andrea Reguitti and Supachai Awiphan and Michel Dennefeld and Kosmas Gazeas},
  journal= {arXiv preprint arXiv:2504.20592},
  year   = {2025}
}

Comments

8 pages, 4 figures; accepted in MNRAS Letters