Extraordinary luminous soft x-ray transient MAXI J0158-744 as an ignition of a nova on a very massive o-Ne white dwarf

M. Morii, H. Tomida, M. Kimura, F. Suwa, H. Negoro, M. Serino, Jamie A. Kennea, K. L. Page, P. A. Curran, F. M. Walter, N. P.M. Kuin, T. Pritchard, S. Nakahira, K. Hiroi, R. Usui, N. Kawai, J. P. Osborne, T. Mihara, M. Sugizaki, N. Gehrels & 12 others M. Kohama, T. Kotani, M. Matsuoka, M. Nakajima, P. W.A. Roming, T. Sakamoto, K. Sugimori, Y. Tsuboi, H. Tsunemi, Y. Ueda, S. Ueno, A. Yoshida

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Abstract

We present the observation of an extraordinary luminous soft X-ray transient, MAXI J0158-744, by the Monitor of All-sky X-ray Image (MAXI) on 2011 November 11. This transient is characterized by a soft X-ray spectrum, a short duration (1.3 × 103 s < ΔTd < 1.10 × 10 4 s), a rapid rise (<5.5 × 103 s), and a huge peak luminosity of 2 × 1040 erg s-1 in 0.7-7.0 keV band. With Swift observations and optical spectroscopy from the Small and Moderate Aperture Research Telescope System, we confirmed that the transient is a nova explosion, on a white dwarf in a binary with a Be star, located near the Small Magellanic Cloud. An early turn-on of the super-soft X-ray source (SSS) phase (<0.44 days), the short SSS phase duration of about one month, and a 0.92 keV neon emission line found in the third MAXI scan, 1296 s after the first detection, suggest that the explosion involves a small amount of ejecta and is produced on an unusually massive O-Ne white dwarf close to, or possibly over, the Chandrasekhar limit. We propose that the huge luminosity detected with MAXI was due to the fireball phase, a direct manifestation of the ignition of the thermonuclear runaway process in a nova explosion.

Original languageEnglish (US)
Article number118
JournalAstrophysical Journal
Volume779
Issue number2
DOIs
StatePublished - Dec 20 2013

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ignition
sky
monitors
x rays
explosions
explosion
luminosity
neon
fireballs
Magellanic clouds
ejecta
erg
apertures
spectroscopy
telescopes
stars

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Morii, M. ; Tomida, H. ; Kimura, M. ; Suwa, F. ; Negoro, H. ; Serino, M. ; Kennea, Jamie A. ; Page, K. L. ; Curran, P. A. ; Walter, F. M. ; Kuin, N. P.M. ; Pritchard, T. ; Nakahira, S. ; Hiroi, K. ; Usui, R. ; Kawai, N. ; Osborne, J. P. ; Mihara, T. ; Sugizaki, M. ; Gehrels, N. ; Kohama, M. ; Kotani, T. ; Matsuoka, M. ; Nakajima, M. ; Roming, P. W.A. ; Sakamoto, T. ; Sugimori, K. ; Tsuboi, Y. ; Tsunemi, H. ; Ueda, Y. ; Ueno, S. ; Yoshida, A. / Extraordinary luminous soft x-ray transient MAXI J0158-744 as an ignition of a nova on a very massive o-Ne white dwarf. In: Astrophysical Journal. 2013 ; Vol. 779, No. 2.
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title = "Extraordinary luminous soft x-ray transient MAXI J0158-744 as an ignition of a nova on a very massive o-Ne white dwarf",
abstract = "We present the observation of an extraordinary luminous soft X-ray transient, MAXI J0158-744, by the Monitor of All-sky X-ray Image (MAXI) on 2011 November 11. This transient is characterized by a soft X-ray spectrum, a short duration (1.3 × 103 s < ΔTd < 1.10 × 10 4 s), a rapid rise (<5.5 × 103 s), and a huge peak luminosity of 2 × 1040 erg s-1 in 0.7-7.0 keV band. With Swift observations and optical spectroscopy from the Small and Moderate Aperture Research Telescope System, we confirmed that the transient is a nova explosion, on a white dwarf in a binary with a Be star, located near the Small Magellanic Cloud. An early turn-on of the super-soft X-ray source (SSS) phase (<0.44 days), the short SSS phase duration of about one month, and a 0.92 keV neon emission line found in the third MAXI scan, 1296 s after the first detection, suggest that the explosion involves a small amount of ejecta and is produced on an unusually massive O-Ne white dwarf close to, or possibly over, the Chandrasekhar limit. We propose that the huge luminosity detected with MAXI was due to the fireball phase, a direct manifestation of the ignition of the thermonuclear runaway process in a nova explosion.",
author = "M. Morii and H. Tomida and M. Kimura and F. Suwa and H. Negoro and M. Serino and Kennea, {Jamie A.} and Page, {K. L.} and Curran, {P. A.} and Walter, {F. M.} and Kuin, {N. P.M.} and T. Pritchard and S. Nakahira and K. Hiroi and R. Usui and N. Kawai and Osborne, {J. P.} and T. Mihara and M. Sugizaki and N. Gehrels and M. Kohama and T. Kotani and M. Matsuoka and M. Nakajima and Roming, {P. W.A.} and T. Sakamoto and K. Sugimori and Y. Tsuboi and H. Tsunemi and Y. Ueda and S. Ueno and A. Yoshida",
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Morii, M, Tomida, H, Kimura, M, Suwa, F, Negoro, H, Serino, M, Kennea, JA, Page, KL, Curran, PA, Walter, FM, Kuin, NPM, Pritchard, T, Nakahira, S, Hiroi, K, Usui, R, Kawai, N, Osborne, JP, Mihara, T, Sugizaki, M, Gehrels, N, Kohama, M, Kotani, T, Matsuoka, M, Nakajima, M, Roming, PWA, Sakamoto, T, Sugimori, K, Tsuboi, Y, Tsunemi, H, Ueda, Y, Ueno, S & Yoshida, A 2013, 'Extraordinary luminous soft x-ray transient MAXI J0158-744 as an ignition of a nova on a very massive o-Ne white dwarf', Astrophysical Journal, vol. 779, no. 2, 118. https://doi.org/10.1088/0004-637X/779/2/118

Extraordinary luminous soft x-ray transient MAXI J0158-744 as an ignition of a nova on a very massive o-Ne white dwarf. / Morii, M.; Tomida, H.; Kimura, M.; Suwa, F.; Negoro, H.; Serino, M.; Kennea, Jamie A.; Page, K. L.; Curran, P. A.; Walter, F. M.; Kuin, N. P.M.; Pritchard, T.; Nakahira, S.; Hiroi, K.; Usui, R.; Kawai, N.; Osborne, J. P.; Mihara, T.; Sugizaki, M.; Gehrels, N.; Kohama, M.; Kotani, T.; Matsuoka, M.; Nakajima, M.; Roming, P. W.A.; Sakamoto, T.; Sugimori, K.; Tsuboi, Y.; Tsunemi, H.; Ueda, Y.; Ueno, S.; Yoshida, A.

In: Astrophysical Journal, Vol. 779, No. 2, 118, 20.12.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Extraordinary luminous soft x-ray transient MAXI J0158-744 as an ignition of a nova on a very massive o-Ne white dwarf

AU - Morii, M.

AU - Tomida, H.

AU - Kimura, M.

AU - Suwa, F.

AU - Negoro, H.

AU - Serino, M.

AU - Kennea, Jamie A.

AU - Page, K. L.

AU - Curran, P. A.

AU - Walter, F. M.

AU - Kuin, N. P.M.

AU - Pritchard, T.

AU - Nakahira, S.

AU - Hiroi, K.

AU - Usui, R.

AU - Kawai, N.

AU - Osborne, J. P.

AU - Mihara, T.

AU - Sugizaki, M.

AU - Gehrels, N.

AU - Kohama, M.

AU - Kotani, T.

AU - Matsuoka, M.

AU - Nakajima, M.

AU - Roming, P. W.A.

AU - Sakamoto, T.

AU - Sugimori, K.

AU - Tsuboi, Y.

AU - Tsunemi, H.

AU - Ueda, Y.

AU - Ueno, S.

AU - Yoshida, A.

PY - 2013/12/20

Y1 - 2013/12/20

N2 - We present the observation of an extraordinary luminous soft X-ray transient, MAXI J0158-744, by the Monitor of All-sky X-ray Image (MAXI) on 2011 November 11. This transient is characterized by a soft X-ray spectrum, a short duration (1.3 × 103 s < ΔTd < 1.10 × 10 4 s), a rapid rise (<5.5 × 103 s), and a huge peak luminosity of 2 × 1040 erg s-1 in 0.7-7.0 keV band. With Swift observations and optical spectroscopy from the Small and Moderate Aperture Research Telescope System, we confirmed that the transient is a nova explosion, on a white dwarf in a binary with a Be star, located near the Small Magellanic Cloud. An early turn-on of the super-soft X-ray source (SSS) phase (<0.44 days), the short SSS phase duration of about one month, and a 0.92 keV neon emission line found in the third MAXI scan, 1296 s after the first detection, suggest that the explosion involves a small amount of ejecta and is produced on an unusually massive O-Ne white dwarf close to, or possibly over, the Chandrasekhar limit. We propose that the huge luminosity detected with MAXI was due to the fireball phase, a direct manifestation of the ignition of the thermonuclear runaway process in a nova explosion.

AB - We present the observation of an extraordinary luminous soft X-ray transient, MAXI J0158-744, by the Monitor of All-sky X-ray Image (MAXI) on 2011 November 11. This transient is characterized by a soft X-ray spectrum, a short duration (1.3 × 103 s < ΔTd < 1.10 × 10 4 s), a rapid rise (<5.5 × 103 s), and a huge peak luminosity of 2 × 1040 erg s-1 in 0.7-7.0 keV band. With Swift observations and optical spectroscopy from the Small and Moderate Aperture Research Telescope System, we confirmed that the transient is a nova explosion, on a white dwarf in a binary with a Be star, located near the Small Magellanic Cloud. An early turn-on of the super-soft X-ray source (SSS) phase (<0.44 days), the short SSS phase duration of about one month, and a 0.92 keV neon emission line found in the third MAXI scan, 1296 s after the first detection, suggest that the explosion involves a small amount of ejecta and is produced on an unusually massive O-Ne white dwarf close to, or possibly over, the Chandrasekhar limit. We propose that the huge luminosity detected with MAXI was due to the fireball phase, a direct manifestation of the ignition of the thermonuclear runaway process in a nova explosion.

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