Hubble space telescope imaging of the expanding nebular remnant of the 2006 outburst of the recurrent nova RS Ophiuchi

M. F. Bode, D. J. Harman, T. J. O'Brien, Howard E. Bond, S. Starrfield, M. J. Darnley, A. Evans, S. P.S. Eyres

Research output: Contribution to journalArticle

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Abstract

We report Hubble Space Telescope imaging obtained 155 days after the 2006 outburst of RS Ophiuchi. We detect extended emission in both [O iii] λ5007 and [Ne v] λ3426 lines. In both lines, the remnant has a double ring structure. The east-west orientation and total extent of these structures (580 ± 50 AU at d p 1.6 kpc) is consistent with that expected due to expansion of emitting regions imaged earlier in the outburst at radio wavelengths. Expansion at high velocity appears to have been roughly constant in the east-west direction (vexp p 3200 ± 300 km s-1 in the plane of the sky), with tentative evidence of deceleration north-south. We present a bipolar model of the remnant whose inclination is consistent with that of the central binary. The true expansion velocities of the polar components are then v p 5600 ± 1100 km s-1. We suggest that the bipolar morphology of the remnant results from interaction of the outburst ejecta with a circumstellar medium that is significantly denser in the equatorial regions of the binary than at the poles. This is also consistent with observations of shock evolution in the X-ray and the possible presence of dust in the infrared. Furthermore, it is in line with models of the shaping of planetary nebulae with close binary central systems, and also with recent observations relating to the progenitors of Type Ia supernovae, for which recurrent novae are a proposed candidate. Our observations also reveal more extended structures to the south and east of the remnant whose possible origin is briefly discussed.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume665
Issue number1 PART 2
DOIs
StatePublished - Jan 1 2007

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Hubble Space Telescope
outburst
expansion
novae
equatorial regions
ring structures
planetary nebulae
deceleration
ejecta
inclination
supernovae
sky
poles
dust
shock
radio
wavelength
wavelengths
x rays
interactions

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bode, M. F., Harman, D. J., O'Brien, T. J., Bond, H. E., Starrfield, S., Darnley, M. J., ... Eyres, S. P. S. (2007). Hubble space telescope imaging of the expanding nebular remnant of the 2006 outburst of the recurrent nova RS Ophiuchi. Astrophysical Journal, 665(1 PART 2). https://doi.org/10.1086/520929
Bode, M. F. ; Harman, D. J. ; O'Brien, T. J. ; Bond, Howard E. ; Starrfield, S. ; Darnley, M. J. ; Evans, A. ; Eyres, S. P.S. / Hubble space telescope imaging of the expanding nebular remnant of the 2006 outburst of the recurrent nova RS Ophiuchi. In: Astrophysical Journal. 2007 ; Vol. 665, No. 1 PART 2.
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abstract = "We report Hubble Space Telescope imaging obtained 155 days after the 2006 outburst of RS Ophiuchi. We detect extended emission in both [O iii] λ5007 and [Ne v] λ3426 lines. In both lines, the remnant has a double ring structure. The east-west orientation and total extent of these structures (580 ± 50 AU at d p 1.6 kpc) is consistent with that expected due to expansion of emitting regions imaged earlier in the outburst at radio wavelengths. Expansion at high velocity appears to have been roughly constant in the east-west direction (vexp p 3200 ± 300 km s-1 in the plane of the sky), with tentative evidence of deceleration north-south. We present a bipolar model of the remnant whose inclination is consistent with that of the central binary. The true expansion velocities of the polar components are then v p 5600 ± 1100 km s-1. We suggest that the bipolar morphology of the remnant results from interaction of the outburst ejecta with a circumstellar medium that is significantly denser in the equatorial regions of the binary than at the poles. This is also consistent with observations of shock evolution in the X-ray and the possible presence of dust in the infrared. Furthermore, it is in line with models of the shaping of planetary nebulae with close binary central systems, and also with recent observations relating to the progenitors of Type Ia supernovae, for which recurrent novae are a proposed candidate. Our observations also reveal more extended structures to the south and east of the remnant whose possible origin is briefly discussed.",
author = "Bode, {M. F.} and Harman, {D. J.} and O'Brien, {T. J.} and Bond, {Howard E.} and S. Starrfield and Darnley, {M. J.} and A. Evans and Eyres, {S. P.S.}",
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Bode, MF, Harman, DJ, O'Brien, TJ, Bond, HE, Starrfield, S, Darnley, MJ, Evans, A & Eyres, SPS 2007, 'Hubble space telescope imaging of the expanding nebular remnant of the 2006 outburst of the recurrent nova RS Ophiuchi', Astrophysical Journal, vol. 665, no. 1 PART 2. https://doi.org/10.1086/520929

Hubble space telescope imaging of the expanding nebular remnant of the 2006 outburst of the recurrent nova RS Ophiuchi. / Bode, M. F.; Harman, D. J.; O'Brien, T. J.; Bond, Howard E.; Starrfield, S.; Darnley, M. J.; Evans, A.; Eyres, S. P.S.

In: Astrophysical Journal, Vol. 665, No. 1 PART 2, 01.01.2007.

Research output: Contribution to journalArticle

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N2 - We report Hubble Space Telescope imaging obtained 155 days after the 2006 outburst of RS Ophiuchi. We detect extended emission in both [O iii] λ5007 and [Ne v] λ3426 lines. In both lines, the remnant has a double ring structure. The east-west orientation and total extent of these structures (580 ± 50 AU at d p 1.6 kpc) is consistent with that expected due to expansion of emitting regions imaged earlier in the outburst at radio wavelengths. Expansion at high velocity appears to have been roughly constant in the east-west direction (vexp p 3200 ± 300 km s-1 in the plane of the sky), with tentative evidence of deceleration north-south. We present a bipolar model of the remnant whose inclination is consistent with that of the central binary. The true expansion velocities of the polar components are then v p 5600 ± 1100 km s-1. We suggest that the bipolar morphology of the remnant results from interaction of the outburst ejecta with a circumstellar medium that is significantly denser in the equatorial regions of the binary than at the poles. This is also consistent with observations of shock evolution in the X-ray and the possible presence of dust in the infrared. Furthermore, it is in line with models of the shaping of planetary nebulae with close binary central systems, and also with recent observations relating to the progenitors of Type Ia supernovae, for which recurrent novae are a proposed candidate. Our observations also reveal more extended structures to the south and east of the remnant whose possible origin is briefly discussed.

AB - We report Hubble Space Telescope imaging obtained 155 days after the 2006 outburst of RS Ophiuchi. We detect extended emission in both [O iii] λ5007 and [Ne v] λ3426 lines. In both lines, the remnant has a double ring structure. The east-west orientation and total extent of these structures (580 ± 50 AU at d p 1.6 kpc) is consistent with that expected due to expansion of emitting regions imaged earlier in the outburst at radio wavelengths. Expansion at high velocity appears to have been roughly constant in the east-west direction (vexp p 3200 ± 300 km s-1 in the plane of the sky), with tentative evidence of deceleration north-south. We present a bipolar model of the remnant whose inclination is consistent with that of the central binary. The true expansion velocities of the polar components are then v p 5600 ± 1100 km s-1. We suggest that the bipolar morphology of the remnant results from interaction of the outburst ejecta with a circumstellar medium that is significantly denser in the equatorial regions of the binary than at the poles. This is also consistent with observations of shock evolution in the X-ray and the possible presence of dust in the infrared. Furthermore, it is in line with models of the shaping of planetary nebulae with close binary central systems, and also with recent observations relating to the progenitors of Type Ia supernovae, for which recurrent novae are a proposed candidate. Our observations also reveal more extended structures to the south and east of the remnant whose possible origin is briefly discussed.

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