Binary orbits as the driver of γ-ray emission and mass ejection in classical novae

Laura Chomiuk, Justin D. Linford, Jun Yang, T. J. O'Brien, Zsolt Paragi, Amy J. Mioduszewski, R. J. Beswick, C. C. Cheung, Koji Mukai, Thomas Nelson, Valério A.R.M. Ribeiro, Michael P. Rupen, J. L. Sokoloski, Jennifer Weston, Yong Zheng, Michael F. Bode, Stewart Eyres, Nirupam Roy, Gregory B. Taylor

Research output: Contribution to journalArticle

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Abstract

Classical novae are the most common astrophysical thermonuclear explosions, occurring on the surfaces of white dwarf stars accreting gas from companions in binary star systems1. Novae typically expel about 10-4 solarmasses ofmaterial at velocities exceeding 1,000 kilometres per second.However, the mechanismofmass ejection innovae is poorly understood, and could be dominated by the impulsive flash of thermonuclear energy2, prolonged optically thick winds3 or binary interaction with the nova envelope4. Classical novae are now routinely detected at gigaelectronvolt γ-ray wavelengths5, suggesting that relativistic particles are accelerated by strong shocks in the ejecta. Here we report high-resolution radio imaging of the γ-rayemitting nova V959 Mon. Wefind that its ejecta were shaped by the motion of the binary system: somegas was expelled rapidly along the poles as a wind from the white dwarf, while denser material drifted out along the equatorial plane, propelled by orbital motion6,7. At the interface between the equatorial and polar regions, we observe synchrotronemission indicative of shocks and relativistic particle acceleration, thereby pinpointingthe locationof γ-ray production. Binary shaping of the nova ejecta and associated internal shocks are expected to be widespread among novae8, explaining why many novae are γ-ray emitters5.

Original languageEnglish
Pages (from-to)339-342
Number of pages4
JournalNature
Volume514
Issue number7522
DOIs
Publication statusPublished - Oct 8 2014

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novae
ejection
rays
ejecta
orbits
relativistic particles
shock
thermonuclear explosions
white dwarf stars
equatorial regions
particle acceleration
binary stars
polar regions
flash
astrophysics
poles
orbitals
high resolution
gases
interactions

All Science Journal Classification (ASJC) codes

  • General

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Chomiuk, L., Linford, J. D., Yang, J., O'Brien, T. J., Paragi, Z., Mioduszewski, A. J., ... Taylor, G. B. (2014). Binary orbits as the driver of γ-ray emission and mass ejection in classical novae. Nature, 514(7522), 339-342. https://doi.org/10.1038/nature13773
Chomiuk, Laura ; Linford, Justin D. ; Yang, Jun ; O'Brien, T. J. ; Paragi, Zsolt ; Mioduszewski, Amy J. ; Beswick, R. J. ; Cheung, C. C. ; Mukai, Koji ; Nelson, Thomas ; Ribeiro, Valério A.R.M. ; Rupen, Michael P. ; Sokoloski, J. L. ; Weston, Jennifer ; Zheng, Yong ; Bode, Michael F. ; Eyres, Stewart ; Roy, Nirupam ; Taylor, Gregory B. / Binary orbits as the driver of γ-ray emission and mass ejection in classical novae. In: Nature. 2014 ; Vol. 514, No. 7522. pp. 339-342.
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abstract = "Classical novae are the most common astrophysical thermonuclear explosions, occurring on the surfaces of white dwarf stars accreting gas from companions in binary star systems1. Novae typically expel about 10-4 solarmasses ofmaterial at velocities exceeding 1,000 kilometres per second.However, the mechanismofmass ejection innovae is poorly understood, and could be dominated by the impulsive flash of thermonuclear energy2, prolonged optically thick winds3 or binary interaction with the nova envelope4. Classical novae are now routinely detected at gigaelectronvolt γ-ray wavelengths5, suggesting that relativistic particles are accelerated by strong shocks in the ejecta. Here we report high-resolution radio imaging of the γ-rayemitting nova V959 Mon. Wefind that its ejecta were shaped by the motion of the binary system: somegas was expelled rapidly along the poles as a wind from the white dwarf, while denser material drifted out along the equatorial plane, propelled by orbital motion6,7. At the interface between the equatorial and polar regions, we observe synchrotronemission indicative of shocks and relativistic particle acceleration, thereby pinpointingthe locationof γ-ray production. Binary shaping of the nova ejecta and associated internal shocks are expected to be widespread among novae8, explaining why many novae are γ-ray emitters5.",
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Chomiuk, L, Linford, JD, Yang, J, O'Brien, TJ, Paragi, Z, Mioduszewski, AJ, Beswick, RJ, Cheung, CC, Mukai, K, Nelson, T, Ribeiro, VARM, Rupen, MP, Sokoloski, JL, Weston, J, Zheng, Y, Bode, MF, Eyres, S, Roy, N & Taylor, GB 2014, 'Binary orbits as the driver of γ-ray emission and mass ejection in classical novae', Nature, vol. 514, no. 7522, pp. 339-342. https://doi.org/10.1038/nature13773

Binary orbits as the driver of γ-ray emission and mass ejection in classical novae. / Chomiuk, Laura; Linford, Justin D.; Yang, Jun; O'Brien, T. J.; Paragi, Zsolt; Mioduszewski, Amy J.; Beswick, R. J.; Cheung, C. C.; Mukai, Koji; Nelson, Thomas; Ribeiro, Valério A.R.M.; Rupen, Michael P.; Sokoloski, J. L.; Weston, Jennifer; Zheng, Yong; Bode, Michael F.; Eyres, Stewart; Roy, Nirupam; Taylor, Gregory B.

In: Nature, Vol. 514, No. 7522, 08.10.2014, p. 339-342.

Research output: Contribution to journalArticle

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AU - Linford, Justin D.

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AU - O'Brien, T. J.

AU - Paragi, Zsolt

AU - Mioduszewski, Amy J.

AU - Beswick, R. J.

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AU - Mukai, Koji

AU - Nelson, Thomas

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AU - Rupen, Michael P.

AU - Sokoloski, J. L.

AU - Weston, Jennifer

AU - Zheng, Yong

AU - Bode, Michael F.

AU - Eyres, Stewart

AU - Roy, Nirupam

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Chomiuk L, Linford JD, Yang J, O'Brien TJ, Paragi Z, Mioduszewski AJ et al. Binary orbits as the driver of γ-ray emission and mass ejection in classical novae. Nature. 2014 Oct 8;514(7522):339-342. https://doi.org/10.1038/nature13773