The dusty nova V1065 centauri (nova cen 2007) : a spectroscopic analysis of abundances and dust properties.

Journal Article · Thu Oct 14 04:00:00 EDT 2010 · Astro. J.

DOI:https://doi.org/10.1088/0004-6256/140/5/1347· OSTI ID:1014818

Helton, L A; 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 ^[1]

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1. Physics

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{sub -2.1}{sup +2.8} kpc. The optical spectral evolution is classified as P{sub fe}{sup o} N{sub ne}A{sub 0} 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, O/H = 58 {+-} 18, and Ne/H = 316 {+-} 58 for the ejecta. We derive an ejected gas mass of M{sub g} = (1.6 {+-} 0.2) x 10{sup -4} M{circle_dot}. 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, Md , of order (0.2-3.7) x 10{sup -7} M{circle_dot}, 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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF; NASA/JPL; UK STFC; NASA Swift Grants
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1014818
• Report Number(s): ANL/PHY/JA-67887
• Journal Information: Astro. J., Journal Name: Astro. J. Journal Issue: 5 ; Oct.14, 2010 Vol. 140; ISSN 0004-6256; ISSN ANJOAA
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
CEN
CLASSIFICATION
COLOR
DUSTS
ENERGY SPECTRA
NEON
PHOTOIONIZATION
SILICATES
SIMULATION
SPECTROMETERS
VELOCITY
WAVELENGTHS