Elemental abundances in the ejecta of old classical novae from late-epoch spitzer spectra

L. Andrew Helton, Robert D. Gehrz, Charles E. Woodward, R. Mark Wagner, William D. Vacca, Aneurin Evans, Joachim Krautter, Greg J. Schwarz, Dinesh P. Shenoy, Sumner Starrfield

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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 4years 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. Using nebular analysis in the low-density regime, we estimate lower limits on the abundances in these novae. In V1974 Cyg and V382 Vel, our observations confirm the abundance estimates presented by other authors and support the claims that these eruptions occurred on ONe white dwarfs (WDs). We report the first detection of neon emission in V1494 Aql and show that the system most likely contains a CO WD.

Original languageEnglish (US)
Article number37
JournalAstrophysical Journal
Volume755
Issue number1
DOIs
StatePublished - Aug 10 2012

Fingerprint

novae
ejecta
neon
time measurement
Indian spacecraft
Space Infrared Telescope Facility
estimates
argon
outburst
volcanic eruptions
magnesium
sulfur
volcanic eruption
examination
signatures
geometry
oxygen
profiles

Keywords

  • cataclysmic variables
  • infrared: stars
  • novae
  • stars: abundances
  • stars: individual (V1974 Cygni
  • V1494 Aquilae)
  • V382 Velorum

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Elemental abundances in the ejecta of old classical novae from late-epoch spitzer spectra. / Helton, L. Andrew; Gehrz, Robert D.; Woodward, Charles E.; Wagner, R. Mark; Vacca, William D.; Evans, Aneurin; Krautter, Joachim; Schwarz, Greg J.; Shenoy, Dinesh P.; Starrfield, Sumner.

In: Astrophysical Journal, Vol. 755, No. 1, 37, 10.08.2012.

Research output: Contribution to journalArticle

Helton, LA, Gehrz, RD, Woodward, CE, Wagner, RM, Vacca, WD, Evans, A, Krautter, J, Schwarz, GJ, Shenoy, DP & Starrfield, S 2012, 'Elemental abundances in the ejecta of old classical novae from late-epoch spitzer spectra', Astrophysical Journal, vol. 755, no. 1, 37. https://doi.org/10.1088/0004-637X/755/1/37
Helton, L. Andrew ; Gehrz, Robert D. ; Woodward, Charles E. ; Wagner, R. Mark ; Vacca, William D. ; Evans, Aneurin ; Krautter, Joachim ; Schwarz, Greg J. ; Shenoy, Dinesh P. ; Starrfield, Sumner. / Elemental abundances in the ejecta of old classical novae from late-epoch spitzer spectra. In: Astrophysical Journal. 2012 ; Vol. 755, No. 1.
@article{0786da7152ad4793a4c366756c584090,
title = "Elemental abundances in the ejecta of old classical novae from late-epoch spitzer spectra",
abstract = "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 4years 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. Using nebular analysis in the low-density regime, we estimate lower limits on the abundances in these novae. In V1974 Cyg and V382 Vel, our observations confirm the abundance estimates presented by other authors and support the claims that these eruptions occurred on ONe white dwarfs (WDs). We report the first detection of neon emission in V1494 Aql and show that the system most likely contains a CO WD.",
keywords = "cataclysmic variables, infrared: stars, novae, stars: abundances, stars: individual (V1974 Cygni, V1494 Aquilae), V382 Velorum",
author = "Helton, {L. Andrew} and Gehrz, {Robert D.} and Woodward, {Charles E.} and Wagner, {R. Mark} and Vacca, {William D.} and Aneurin Evans and Joachim Krautter and Schwarz, {Greg J.} and Shenoy, {Dinesh P.} and Sumner Starrfield",
year = "2012",
month = "8",
day = "10",
doi = "10.1088/0004-637X/755/1/37",
language = "English (US)",
volume = "755",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Elemental abundances in the ejecta of old classical novae from late-epoch spitzer spectra

AU - Helton, L. Andrew

AU - Gehrz, Robert D.

AU - Woodward, Charles E.

AU - Wagner, R. Mark

AU - Vacca, William D.

AU - Evans, Aneurin

AU - Krautter, Joachim

AU - Schwarz, Greg J.

AU - Shenoy, Dinesh P.

AU - Starrfield, Sumner

PY - 2012/8/10

Y1 - 2012/8/10

N2 - 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 4years 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. Using nebular analysis in the low-density regime, we estimate lower limits on the abundances in these novae. In V1974 Cyg and V382 Vel, our observations confirm the abundance estimates presented by other authors and support the claims that these eruptions occurred on ONe white dwarfs (WDs). We report the first detection of neon emission in V1494 Aql and show that the system most likely contains a CO WD.

AB - 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 4years 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. Using nebular analysis in the low-density regime, we estimate lower limits on the abundances in these novae. In V1974 Cyg and V382 Vel, our observations confirm the abundance estimates presented by other authors and support the claims that these eruptions occurred on ONe white dwarfs (WDs). We report the first detection of neon emission in V1494 Aql and show that the system most likely contains a CO WD.

KW - cataclysmic variables

KW - infrared: stars

KW - novae

KW - stars: abundances

KW - stars: individual (V1974 Cygni

KW - V1494 Aquilae)

KW - V382 Velorum

UR - http://www.scopus.com/inward/record.url?scp=84864479719&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864479719&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/755/1/37

DO - 10.1088/0004-637X/755/1/37

M3 - Article

VL - 755

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 37

ER -