# ELEMENTAL ABUNDANCES IN THE EJECTA OF OLD CLASSICAL NOVAE FROM LATE-EPOCH SPITZER SPECTRA

@article{Helton2012ELEMENTALAI,
title={ELEMENTAL ABUNDANCES IN THE EJECTA OF OLD CLASSICAL NOVAE FROM LATE-EPOCH SPITZER SPECTRA},
author={L. Andrew Helton and Robert D. Gehrz and Charles E. Woodward and R. Mark Wagner and William D. Vacca and Aneurin Evans and Joachim Krautter and Greg J. Schwarz and Dinesh Shenoy and Sumner Starrfield},
journal={The Astrophysical Journal},
year={2012},
volume={755}
}
• Published 18 June 2012
• Physics
• The Astrophysical Journal
We present Spitzer Space Telescope mid-infrared IRS spectra, supplemented by ground-based optical observations, of the classical novae V1974 Cyg, V382 Vel, and V1494 Aql more than 11, 8, and 4 years after outburst, respectively. The spectra are dominated by forbidden emission from neon and oxygen, though in some cases, there are weak signatures of magnesium, sulfur, and argon. We investigate the geometry and distribution of the late time ejecta by examination of the emission line profiles…
22 Citations
• Physics
• 2020
X-ray observations of shocked gas in novae can provide a useful probe of the dynamics of the ejecta. Here we report on X-ray observations of the nova V959 Mon, which was also detected in GeV
• Physics, Geology
The Astronomical Journal
• 2021
Luminous Red Variables are most likely eruptions that are the outcome of stellar mergers. V838 Mon is one of the best-studied members of this class, representing an archetype for stellar mergers
• Physics
Research Notes of the AAS
• 2021
Classical novae contribute to the cycle of chemical enrichment of the interstellar medium through through explosive nucleosynthesis and the violent ejection of material dredged from the white dwarf
• Physics
• 2013
Nova Mon 2012 was the first classical nova to be detected as a high energy $\gamma$-ray transient, by Fermi-LAT, before its optical discovery. We study a time sequence of high resolution optical
• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
We report the discovery of the diatomic molecule SiO in the gas phase in the environment of the recurrent nova T Coronae Borealis. While some of the SiO is photospheric, a substantial portion must
• Physics
• 2011
We present Spitzer/InfraRed Spectrograph (IRS) low-resolution observations of 11 compact circumstellar bubbles from the MIPSGAL 24 μm Galactic plane survey. We find that this set of MIPSGAL bubbles
• Physics, Geology
• 2021
We review the properties of dust formed during classical nova eruptions and the Very Late Thermal Pulses (VLTPs) that occur during the later stages of post-Asymptotic Giant Branch evolution of
• Physics
• 2015
We have extracted the WISE (Wide-field Infrared Survey Explorer) single-exposure data for a sample of 72 polars, which are highly magnetic cataclysmic variables (CVs). We combine these data with both
• Physics
• 2020
We wish to acknowledge the support of the late Neil Gehrels and the Swift mission team for their help in scheduling the observations presented in this article. This research has made use of data and
• Physics, Geology
• 2017
Classical novae commonly show evidence of rapid dust formation within months of the outburst. However, it is unclear how molecules and grains are able to condense within the ejecta, given the

## References

SHOWING 1-10 OF 70 REFERENCES

• Physics
• 2007
We present ground-based SpectroCam-10 mid-infrared, MMT optical, and Spitzer Space Telescope IRS mid-infrared spectra taken 7.62, 18.75, and 19.38 yr, respectively, after the outburst of the old
• Physics
• 2003
We present the spectral evolution of the shell of Nova Vel 1999 during the first 3 years after visual maximum. We monitored the ionization in the ejecta and verified an increase in ionization about
• Physics
• 2005
V1494 Aql was a very fast nova which reached a visual maximum of mv≃ 4.0 by the end of 1999 December 3. We report observations from 4 to 284 d after discovery, including submillimetre- and
• Physics
• 2010
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
• Physics
• 2001
LMC 91 was a very fast, classical nova and the brightest nova ever observed in the Large Magellanic Cloud. It was extensively observed during both its early optically thick and its nebular evolution
This paper presents a new determination of the ejecta elemental abundances of the moderately fast ONeMg nova QU Vul 1984 using published ultraviolet, optical, infrared, and radio observations. The
• Physics
• 1999
We present our analysis of the UV spectra of the fast ONeMg Nova LMC 1990#1. Observations with the IUE began on 1990 January 18 and continued through to 1990 March 15. We have analysed these spectra,
• Physics
• 2004
We have carried out a detailed analysis of the IUE archival high resolution spectra of the classical nova V1974 Cyg 1992. The main UV resonance lines show P Cygni profiles in the first days, which
• Physics
• 2007
V838 Her and V4160 Sgr were two of the fastest classical novae ever observed, exhibiting light curve declines of 2 mag in less than 2 days. Both novae also showed strong neon emission lines,
• Physics
• 1997
We report the observation of spatially resolved low-resolution GHRS spectra of the shell of the bright Galactic ONeMg nova Cygni 1992. The spectra were obtained in 1995 September, after the X-ray