Evans, A, Banerjee, DPK, Gehrz, RD, Joshi, V, Ashok, NM, Ribeiro, VARM, Darnley, MJ, Woodward, CE, Sand, D, Marion, GH, Diamond, TR, Eyres, SPS, Wagner, RM, Helton, LA, Starrfield, S, Shenoy, DP, Krautter, J, Vacca, WD and Rushton, MT (2017) Rise and fall of the dust shell of the classical nova V339 Delphini. Monthly Notices of the Royal Astronomical Society, 466 (4). pp. 4221-4238. ISSN 0035-8711
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Abstract
We present infrared spectroscopy of the classical nova V339 Delphini, obtained over a $\sim2$ year period. The infrared emission lines were initially symmetrical, with HWHM velocities of 525 km s$^{-1}$. In later ($t\gtrsim77$days, where $t$ is the time from outburst) spectra however, the lines displayed a distinct asymmetry, with a much stronger blue wing, possibly due to obscuration of the receding component by dust. Dust formation commenced at $\sim$ day 34.75 at a condensation temperature of $1480\pm20$K, consistent with graphitic carbon. Thereafter the dust temperature declined with time as $T_{\rm d}\propto{t}^{-0.346}$, also consistent with graphitic carbon. The mass of dust initally rose, as a result of an increase in grain size and/or number, peaked at $\sim$ day 100, and then declined precipitously. This decline was most likely caused by grain shattering due to electrostatic stress after the dust was exposed to X-radiation. An Appendix summarises Planck Means for carbon, and the determination of grain mass and radius for a carbon dust shell.
Item Type: | Article |
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Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Uncontrolled Keywords: | astro-ph.SR; astro-ph.SR |
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
Divisions: | Astrophysics Research Institute |
Publisher: | Oxford University Press |
Related URLs: | |
Date Deposited: | 05 Jan 2017 10:30 |
Last Modified: | 30 Mar 2022 08:31 |
DOI or ID number: | 10.1093/mnras/stw3334 |
URI: | https://researchonline.ljmu.ac.uk/id/eprint/5163 |
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