The dusty nova v1065 centauri (nova cen 2007): Aspectroscopic analysis of abundances and dust properties

L. Andrew Helton, Charles E. Woodward, Frederick M. Walter, Karen Vanlandingham, Greg J. Schwarz, Aneurin Evans, Jan Uwe Ness, Thomas R. Geballe, Robert D. Gehrz, Matthew Greenhouse, Joachim Krautter, William Liller, David K. Lynch, Richard J. Rudy, Steven N. Shore, Sumner Starrfield, Jim Truran

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We examine the ejecta evolution of the classical nova V1065 Centauri, constructing a detailed picture of the system based on spectrophotometric observations obtained from 9 to approximately 900 days post-outburst with extensive coverage from optical to mid-infrared wavelengths. We estimate a reddening toward the system of E(B -V) = 0.5 ± 0.1, based upon the B-V color and analysis of the Balmer decrement, and derive a distance estimate of 8.7-2.1+2.8kpc. The optical spectral evolution is classified as PfeNneA0 according to the CTIO Nova Classification system of Williams et al. Photoionization modeling yields absolute abundance values by number, relative to solar of He/H = 1.6 ± 0.3, N/H = 144 ± 34,0/H = 58 ± 18, and Ne/H = 316 ± 58 for the ejecta. We derive an ejected gas mass of Mg = (1.6 ± 0.2) × 10-4 M0. The infrared excess at late epochs in the evolution of the nova arises from dust condensed in the ejecta composed primarily of silicate grains. We estimate a total dust mass, M1/, of order (0.2-3.7) × 10-7 M0, inferred from modeling the spectral energy distribution observed with the Spitzer IRS and Gemini-South GNIRS spectrometers. Based on the speed class, neon abundance, and the predominance of silicate dust, we classify V1065 Cen as an ONe-type classical nova.

Original languageEnglish (US)
Pages (from-to)1347-1369
Number of pages23
JournalAstronomical Journal
Volume140
Issue number5
DOIs
StatePublished - Nov 1 2010

Keywords

  • Cataclysmic variables stars: Individual (v1065 cen
  • Circumstellar matter novae
  • Nova cen 2007)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Andrew Helton, L., Woodward, C. E., Walter, F. M., Vanlandingham, K., Schwarz, G. J., Evans, A., Ness, J. U., Geballe, T. R., Gehrz, R. D., Greenhouse, M., Krautter, J., Liller, W., Lynch, D. K., Rudy, R. J., Shore, S. N., Starrfield, S., & Truran, J. (2010). The dusty nova v1065 centauri (nova cen 2007): Aspectroscopic analysis of abundances and dust properties. Astronomical Journal, 140(5), 1347-1369. https://doi.org/10.1088/0004-6256/140/5/1347