On the narrow emission line components of the LMC novae 2004 (YY Dor) and 2009a

Abstract

We present early decline spectra of the two Large Magellanic Cloud novae: LMC 2004 (YY Dor) and LMC 2009a and discuss their spectral an line profile evolution with special emphasis on the existence and appearance of a sharp component. We show that the narrow component that characterizes the emission lines in the maximum spectra of nova LMC 2004 originates in the ejecta. The HeII 4686 A, narrow emission which appears at the onset of the nebular phase in both novae is somewhat controversial. Our observations suggest that the corresponding line forming region is physically separated from the rest of the ejecta (the broad line region) and environmentally different. However, the lack of late time observations covering the super-soft source (SSS) phase, the post-SSS phase and the quiescence state does not allow to securely establish any non-ejecta origin/contribution as, instead, in the case of U Sco and KT Eri.

arXiv comment11 pages, 9 figures. Accepted for publication in Astronomy and Astrophysics on Aug 13 2014

References in corpus (21)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• GASS: The Parkes Galactic All-Sky Survey. I. Survey Description, Goals, and Initial Data Release
• Comprehensive Photometric Histories of All Known Galactic Recurrent Novae
• Swift X-Ray Observations of Classical Novae. II. The Super Soft Source sample
• A high sensitivity HI survey of the sky at delta < -25 deg Final data release
• The Stony Brook / SMARTS Atlas of mostly Southern Novae
• The mass of the white dwarf in the recurrent nova U Scorpii
• On the Progenitors of Galactic Novae
• The spectroscopic evolution of the $\gamma$-ray emitting classical nova Nova Mon 2012. I. Implications for the ONe subclass of classical novae
• Identifying and Quantifying Recurrent Novae Masquerading as Classical Novae
• Transiting exoplanets from the CoRoT space mission IX. CoRoT-6b: a transiting `hot Jupiter' planet in an 8.9d orbit around a low-metallicity star
• Optical Morphology, Inclination and Expansion Velocity of the Ejected Shell of Nova Monocerotis 2012
• Properties, evolution and morpho-kinematical modelling of the very fast nova V2672 Oph (Nova Oph 2009), a clone of U Sco
• The spectroscopic evolution of the recurrent nova T Pyxidis during its 2011 outburst. II.The optically thin phase and the structure of the ejecta in recurrent novae
• The production of strong broad He II emission after the tidal disruption of a main-sequence star by a supermassive black hole
• Morpho-Kinematical Modelling of Nova Eridani 2009 (KT Eri)
• The spectral evolution and ejecta of recurrent nova U Sco in the 2010 outburst
• U Sco 2010 outburst: a new understanding of the binary accretion disk and the secondary star
• Historical light curve and search for previous outbursts of Nova KT Eridani (2009)
• The He II Fowler lines and the O III and N III Bowen fluorescence lines in the symbiotic nova RR Tel
• The narrow and moving HeII lines in nova KT Eri

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• OGLE Atlas of Classical Novae. II. Magellanic Clouds
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• A search and modeling of peculiar narrow transient line components in novae spectra