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The peculiar bursting nature of CP Pup

The peculiar bursting nature of CP Pup
The peculiar bursting nature of CP Pup

The classical nova CP Puppis has been observed to have particularly puzzling and peculiar properties. In particular, this classical nova displays occasional bursts in its long-term ASAS-SN light curve. Here, we report on five sectors of TESS data displaying two of these rapid bursts, lasting ∼1 d. Based on the estimated lower energy limits of the bursts, we discuss whether the bursts may be examples of micronovae resulting from localized thermonuclear explosion. Furthermore, its orbital period remains uncertain, with several inconsistent periodic signals appearing in spectroscopic and photometric observations at various wavelengths. Although we cannot unambiguously unravel the physical origin of the signals, the previously suggested nature of CP Puppis as a long orbital period system may be a viable explanation. The recurrence time of the bursts in CP Puppis, together with the unexplained variable modulations make it a prime candidate for intense monitoring.

astro-ph.HE, astro-ph.SR, cataclysmic variables, accretion, accretion discs – novae
0035-8711
664-672
Veresvarska, M.
a4766578-49e7-48a9-95f2-19d8562aa1de
Scaringi, S.
88701970-a1b9-41fe-bf55-886716ee3374
Hagen, S.
60c90fd0-4e79-4685-9ab8-3e26e9e2c642
Martino, D. De
c3d03657-f125-47d4-a6ae-080a5560a9f6
Done, C.
1d119e0e-6315-42bc-8b91-41699d1e50bd
Ilkiewicz, K.
0791e0ee-eaf2-4fa6-8156-a65a5a58672c
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Littlefield, C.
5844d5fc-231e-44dd-ab6f-ace3c7f92db7
Veresvarska, M.
a4766578-49e7-48a9-95f2-19d8562aa1de
Scaringi, S.
88701970-a1b9-41fe-bf55-886716ee3374
Hagen, S.
60c90fd0-4e79-4685-9ab8-3e26e9e2c642
Martino, D. De
c3d03657-f125-47d4-a6ae-080a5560a9f6
Done, C.
1d119e0e-6315-42bc-8b91-41699d1e50bd
Ilkiewicz, K.
0791e0ee-eaf2-4fa6-8156-a65a5a58672c
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Littlefield, C.
5844d5fc-231e-44dd-ab6f-ace3c7f92db7

Veresvarska, M., Scaringi, S., Hagen, S., Martino, D. De, Done, C., Ilkiewicz, K., Knigge, C. and Littlefield, C. (2024) The peculiar bursting nature of CP Pup. Monthly Notices Of The Royal Astronomical Society, 529 (1), 664-672. (doi:10.1093/mnras/stae573).

Record type: Article

Abstract

The classical nova CP Puppis has been observed to have particularly puzzling and peculiar properties. In particular, this classical nova displays occasional bursts in its long-term ASAS-SN light curve. Here, we report on five sectors of TESS data displaying two of these rapid bursts, lasting ∼1 d. Based on the estimated lower energy limits of the bursts, we discuss whether the bursts may be examples of micronovae resulting from localized thermonuclear explosion. Furthermore, its orbital period remains uncertain, with several inconsistent periodic signals appearing in spectroscopic and photometric observations at various wavelengths. Although we cannot unambiguously unravel the physical origin of the signals, the previously suggested nature of CP Puppis as a long orbital period system may be a viable explanation. The recurrence time of the bursts in CP Puppis, together with the unexplained variable modulations make it a prime candidate for intense monitoring.

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Accepted/In Press date: 21 February 2024
e-pub ahead of print date: 22 February 2024
Published date: 1 March 2024
Additional Information: Publisher Copyright: © 2024 The Author(s).
Keywords: astro-ph.HE, astro-ph.SR, cataclysmic variables, accretion, accretion discs – novae

Identifiers

Local EPrints ID: 488867
URI: http://eprints.soton.ac.uk/id/eprint/488867
ISSN: 0035-8711
PURE UUID: 5f14d16b-b8d3-4c39-90a1-bb4002b16c9c

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Date deposited: 09 Apr 2024 09:48
Last modified: 24 May 2024 16:52

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Contributors

Author: M. Veresvarska
Author: S. Scaringi
Author: S. Hagen
Author: D. De Martino
Author: C. Done
Author: K. Ilkiewicz
Author: C. Knigge
Author: C. Littlefield

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