The Spitzer Infrared Spectrometer view of V4334 Sgr (Sakurai's Object)

A. Evans; V. H. Tyne; J. T. van Loon; B. Smalley; T. R. Geballe; R. D. Gehrz; C. E. Woodward; A. A. Zijlstra; E. Polomski; M. T. Rushton; S. P S Eyres; Sumner Starrfield; J. Krautter; R. M. Wagner

doi:10.1111/j.1745-3933.2006.00246.x

The Spitzer Infrared Spectrometer view of V4334 Sgr (Sakurai's Object)

A. Evans, V. H. Tyne, J. T. van Loon, B. Smalley, T. R. Geballe, R. D. Gehrz, C. E. Woodward, A. A. Zijlstra, E. Polomski, M. T. Rushton, S. P S Eyres, Sumner Starrfield, J. Krautter, R. M. Wagner

Research output: Contribution to journal › Letter › peer-review

29 Scopus citations

Abstract

We present an observation of the very late thermal pulse object V4334 Sgr (Sakurai's Object) with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope. The emission from 5-38 μm is dominated by the still-cooling dust shell. A number of features are seen in absorption against the dust shell, which we attribute to HCN and polyyne molecules. We use these features to determine the ¹²C/¹³C ratio for the absorbing gas to be ~3.2^+3.2_-1.6, this implies that, despite the H-content of the molecules, the hydrocarbon-bearing gas must have originated in material produced in the very late thermal pulse. We see no evidence of emission lines, despite the recently-reported optical and radio observations that suggest the effective temperature of the stellar remnant is rising.

Original language	English (US)
Pages (from-to)	L75-L79
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	373
Issue number	1
DOIs	https://doi.org/10.1111/j.1745-3933.2006.00246.x
State	Published - Nov 2006

Keywords

Circumstellar matter
Stars: carbon
Stars: evolution
Stars: individual: V4334 Sgr
Stars: individual: sakurai's object
Stars: mass-loss

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Evans, A., Tyne, V. H., van Loon, J. T., Smalley, B., Geballe, T. R., Gehrz, R. D., Woodward, C. E., Zijlstra, A. A., Polomski, E., Rushton, M. T., Eyres, S. P. S., Starrfield, S., Krautter, J., & Wagner, R. M. (2006). The Spitzer Infrared Spectrometer view of V4334 Sgr (Sakurai's Object). Monthly Notices of the Royal Astronomical Society: Letters, 373(1), L75-L79. https://doi.org/10.1111/j.1745-3933.2006.00246.x

Evans, A, Tyne, VH, van Loon, JT, Smalley, B, Geballe, TR, Gehrz, RD, Woodward, CE, Zijlstra, AA, Polomski, E, Rushton, MT, Eyres, SPS, Starrfield, S, Krautter, J & Wagner, RM 2006, 'The Spitzer Infrared Spectrometer view of V4334 Sgr (Sakurai's Object)', Monthly Notices of the Royal Astronomical Society: Letters, vol. 373, no. 1, pp. L75-L79. https://doi.org/10.1111/j.1745-3933.2006.00246.x

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abstract = "We present an observation of the very late thermal pulse object V4334 Sgr (Sakurai's Object) with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope. The emission from 5-38 μm is dominated by the still-cooling dust shell. A number of features are seen in absorption against the dust shell, which we attribute to HCN and polyyne molecules. We use these features to determine the 12C/13C ratio for the absorbing gas to be ~3.2+3.2-1.6, this implies that, despite the H-content of the molecules, the hydrocarbon-bearing gas must have originated in material produced in the very late thermal pulse. We see no evidence of emission lines, despite the recently-reported optical and radio observations that suggest the effective temperature of the stellar remnant is rising.",

keywords = "Circumstellar matter, Stars: carbon, Stars: evolution, Stars: individual: V4334 Sgr, Stars: individual: sakurai's object, Stars: mass-loss",

author = "A. Evans and Tyne, {V. H.} and {van Loon}, {J. T.} and B. Smalley and Geballe, {T. R.} and Gehrz, {R. D.} and Woodward, {C. E.} and Zijlstra, {A. A.} and E. Polomski and Rushton, {M. T.} and Eyres, {S. P S} and Sumner Starrfield and J. Krautter and Wagner, {R. M.}",

year = "2006",

month = nov,

doi = "10.1111/j.1745-3933.2006.00246.x",

language = "English (US)",

volume = "373",

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AU - Evans, A.

AU - Tyne, V. H.

AU - van Loon, J. T.

AU - Smalley, B.

AU - Geballe, T. R.

AU - Gehrz, R. D.

AU - Woodward, C. E.

AU - Zijlstra, A. A.

AU - Polomski, E.

AU - Rushton, M. T.

AU - Eyres, S. P S

AU - Starrfield, Sumner

AU - Krautter, J.

AU - Wagner, R. M.

PY - 2006/11

Y1 - 2006/11

N2 - We present an observation of the very late thermal pulse object V4334 Sgr (Sakurai's Object) with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope. The emission from 5-38 μm is dominated by the still-cooling dust shell. A number of features are seen in absorption against the dust shell, which we attribute to HCN and polyyne molecules. We use these features to determine the 12C/13C ratio for the absorbing gas to be ~3.2+3.2-1.6, this implies that, despite the H-content of the molecules, the hydrocarbon-bearing gas must have originated in material produced in the very late thermal pulse. We see no evidence of emission lines, despite the recently-reported optical and radio observations that suggest the effective temperature of the stellar remnant is rising.

AB - We present an observation of the very late thermal pulse object V4334 Sgr (Sakurai's Object) with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope. The emission from 5-38 μm is dominated by the still-cooling dust shell. A number of features are seen in absorption against the dust shell, which we attribute to HCN and polyyne molecules. We use these features to determine the 12C/13C ratio for the absorbing gas to be ~3.2+3.2-1.6, this implies that, despite the H-content of the molecules, the hydrocarbon-bearing gas must have originated in material produced in the very late thermal pulse. We see no evidence of emission lines, despite the recently-reported optical and radio observations that suggest the effective temperature of the stellar remnant is rising.

KW - Circumstellar matter

KW - Stars: carbon

KW - Stars: evolution

KW - Stars: individual: V4334 Sgr

KW - Stars: individual: sakurai's object

KW - Stars: mass-loss

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JO - Monthly Notices of the Royal Astronomical Society: Letters

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The Spitzer Infrared Spectrometer view of V4334 Sgr (Sakurai's Object)

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Keywords

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