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Astrophysics > Solar and Stellar Astrophysics

arXiv:1312.5846 (astro-ph)
[Submitted on 20 Dec 2013]

Title:CKVul: evolving nebula and three curious background stars

Authors:M. Hajduk, P. A. M. van Hoof, A. A. Zijlstra
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Abstract:We analyse the remnants of CK Vul (Nova Vul 1670) using optical imaging and spectroscopy. The imaging, obtained between 1991 and 2010, spans 5.6% of the life-time of the nebula. The flux of the nebula decreased during the last 2 decades. The central source still maintains the ionization of the innermost part of the nebula, but recombination proceeds in more distant parts of the nebula. Surprisingly, we discovered two stars located within 10 arcsec of the expansion centre of the radio emission that are characterized by pronounced long term variations and one star with high proper motion. The high proper motion star is a foreground object, and the two variable stars are background objects. The photometric variations of two variables are induced by a dusty cloud ejected by CK Vul and passing through the line of sight to those stars. The cloud leaves strong lithium absorption in the spectra of the stars. We discuss the nature of the object in terms of recent observations.
Comments: Published in MNRAS, available at this http URL
Subjects: Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:1312.5846 [astro-ph.SR]
  (or arXiv:1312.5846v1 [astro-ph.SR] for this version)
  https://doi.org/10.48550/arXiv.1312.5846
Journal reference: MNRAS 2013, 432, 167H
Related DOI: https://doi.org/10.1093/mnras/stt426

Submission history

From: Marcin Hajduk [view email]
[v1] Fri, 20 Dec 2013 08:30:28 UTC (2,737 KB)
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