Symbiotic Star T CrB as an Extreme SU UMa–type Dwarf Nova

T CrB is a symbiotic recurrent nova that exhibits quiescent and active phases between its classical nova eruptions. The statistical properties of these active phases have been poorly studied thus far. Because of that their nature remained unknown. Here we study statistical properties of the active p...

Full description

Saved in:
Bibliographic Details
Published in:Astrophysical journal. Letters 2023-08, Vol.953 (1), p.L7
Main Authors: Iłkiewicz, Krystian, Mikołajewska, Joanna, Stoyanov, Kiril A.
Format: Article
Language:English
Subjects:
Classical novae
Dwarf novae
Novae
Orbits
Outbursts
Phases
SU Ursae Majoris stars
Symbiotic binary stars
Symbiotic stars
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:T CrB is a symbiotic recurrent nova that exhibits quiescent and active phases between its classical nova eruptions. The statistical properties of these active phases have been poorly studied thus far. Because of that their nature remained unknown. Here we study statistical properties of the active phases and show that they are consistent with outburst and superoutbursts observed in SU UMa–type dwarf novae. The recurrence time of these outbursts is consistent with theoretical predictions for similar systems. Moreover, the visual and X-ray evolution of the last active phase is consistent with a superoutburst. This suggests that T CrB is a dwarf nova with an extremely long orbital period, closely related to SU UMa dwarf novae. The similarities between the last superoutburst and the reported activity preceding the 1946 nova eruption may suggest that the next classical nova eruption in T CrB could be indeed soon expected.
ISSN:2041-8205
2041-8213
DOI:10.3847/2041-8213/ace9dc