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The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon?

The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon?
The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon?
We present a detailed study of the 2019 outburst of the cataclysmic variable V1047 Cen, which hosted a classical nova eruption in 2005. The peculiar outburst occurred 14 years after the classical nova event, lasted for more than 400 days, and reached an amplitude of around 6 magnitudes in the optical. Early spectral follow-up revealed what could be a dwarf nova (accretion disk instability) outburst in a classical nova system. However, the outburst duration, high velocity ($>$2000 km s$^{-1}$) features in the optical line profiles, luminous optical emission, and the presence of prominent long-lasting radio emission, together suggest a phenomenon more exotic and energetic than a dwarf nova outburst. There are striking similarities between this V1047 Cen outburst and those of "combination novae" in classical symbiotic stars. We suggest that the outburst may have started as a dwarf nova that led to the accretion of a massive disk, which in turn triggered enhanced nuclear shell burning on the white dwarf and eventually led to generation of a wind/outflow. From optical photometry we find a \bf{possible} orbital period of 8.36 days, which supports the combination nova scenario and makes the system an intermediate case between typical cataclysmic variables and classical symbiotic binaries. If true, such a phenomenon would be the first of its kind to occur in a system that has undergone a classical nova eruption and is intermediate between cataclysmic variables and symbiotic binaries.
astro-ph.SR, astro-ph.HE
0035-8711
Aydi, E.
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Sokolovsky, K. V.
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Bright, J. S.
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Tremou, E.
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Nyamai, M. M.
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Strader, J.
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Chomiuk, L.
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Myers, G.
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Hambsch, F-J
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Buckley, D. A. H.
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Walter, F. M.
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Mróz, P.
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Vallely, P. J.
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Geballe, T. R.
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Gehrz, R. D.
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Fender, R. P.
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Gromadzki, M.
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Kawash, A.
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Knigge, C.
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Mukai, K.
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Munari, U.
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Orio, M.
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Ribeiro, V. A. R. M.
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Sokoloski, J. L.
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Starrfield, S.
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Udalski, A.
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Woudt, P. A.
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Aydi, E.
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Sokolovsky, K. V.
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Bright, J. S.
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Tremou, E.
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Nyamai, M. M.
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Strader, J.
65549124-aafe-4b6e-a5cb-2ca8b2624843
Chomiuk, L.
71fe2d37-8846-4d13-8bcd-b8459a57aa93
Myers, G.
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Hambsch, F-J
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Buckley, D. A. H.
2b82e4e2-d175-4cb3-9868-46b13f4f890c
Walter, F. M.
40cf7f89-b716-4d45-9629-4296a084c8de
Mróz, P.
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Vallely, P. J.
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Geballe, T. R.
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Gehrz, R. D.
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Fender, R. P.
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Gromadzki, M.
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Kawash, A.
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Knigge, C.
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Mukai, K.
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Munari, U.
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Orio, M.
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Ribeiro, V. A. R. M.
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Sokoloski, J. L.
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Starrfield, S.
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Udalski, A.
320fdc94-b983-41cd-ad0d-0aee565e7142
Woudt, P. A.
078a12fd-3894-42c5-b3b6-1747a9325c51

Aydi, E., Sokolovsky, K. V., Bright, J. S., Tremou, E., Nyamai, M. M., Strader, J., Chomiuk, L., Myers, G., Hambsch, F-J, Buckley, D. A. H., Walter, F. M., Mróz, P., Vallely, P. J., Geballe, T. R., Gehrz, R. D., Fender, R. P., Gromadzki, M., Kawash, A., Knigge, C., Mukai, K., Munari, U., Orio, M., Ribeiro, V. A. R. M., Sokoloski, J. L., Starrfield, S., Udalski, A. and Woudt, P. A. (2021) The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon? Monthly Notices of the Royal Astronomical Society.

Record type: Article

Abstract

We present a detailed study of the 2019 outburst of the cataclysmic variable V1047 Cen, which hosted a classical nova eruption in 2005. The peculiar outburst occurred 14 years after the classical nova event, lasted for more than 400 days, and reached an amplitude of around 6 magnitudes in the optical. Early spectral follow-up revealed what could be a dwarf nova (accretion disk instability) outburst in a classical nova system. However, the outburst duration, high velocity ($>$2000 km s$^{-1}$) features in the optical line profiles, luminous optical emission, and the presence of prominent long-lasting radio emission, together suggest a phenomenon more exotic and energetic than a dwarf nova outburst. There are striking similarities between this V1047 Cen outburst and those of "combination novae" in classical symbiotic stars. We suggest that the outburst may have started as a dwarf nova that led to the accretion of a massive disk, which in turn triggered enhanced nuclear shell burning on the white dwarf and eventually led to generation of a wind/outflow. From optical photometry we find a \bf{possible} orbital period of 8.36 days, which supports the combination nova scenario and makes the system an intermediate case between typical cataclysmic variables and classical symbiotic binaries. If true, such a phenomenon would be the first of its kind to occur in a system that has undergone a classical nova eruption and is intermediate between cataclysmic variables and symbiotic binaries.

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2108.07868v1 - Author's Original
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Published date: 17 August 2021
Additional Information: 36 pages, 27 figures, 8 tables. Submitted to ApJ
Keywords: astro-ph.SR, astro-ph.HE

Identifiers

Local EPrints ID: 451156
URI: http://eprints.soton.ac.uk/id/eprint/451156
ISSN: 0035-8711
PURE UUID: 6976e850-e18f-4224-bd96-79d36103bea7

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Date deposited: 14 Sep 2021 15:30
Last modified: 14 Sep 2021 15:30

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Contributors

Author: E. Aydi
Author: K. V. Sokolovsky
Author: J. S. Bright
Author: E. Tremou
Author: M. M. Nyamai
Author: J. Strader
Author: L. Chomiuk
Author: G. Myers
Author: F-J Hambsch
Author: D. A. H. Buckley
Author: F. M. Walter
Author: P. Mróz
Author: P. J. Vallely
Author: T. R. Geballe
Author: R. D. Gehrz
Author: R. P. Fender
Author: M. Gromadzki
Author: A. Kawash
Author: C. Knigge
Author: K. Mukai
Author: U. Munari
Author: M. Orio
Author: V. A. R. M. Ribeiro
Author: J. L. Sokoloski
Author: S. Starrfield
Author: A. Udalski
Author: P. A. Woudt

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