Photometric and Spectroscopic Observations of V1280 Sco
Hiroyuki Naito, Sahori Mizoguchi, Akira Arai, Masayuki Yamanaka,, Shin-ya Narusawa, Kozo Sadakane, Takashi Iijima
TL;DR
This paper presents photometric and spectroscopic observations of Nova V1280 Sco, revealing its classification as an Fe II nova with the slowest spectroscopic evolution and evidence of dust formation, along with CNO abundance estimates.
Contribution
It provides detailed observational data and analysis of V1280 Sco's slow evolution and chemical abundances, which is novel for this type of nova.
Findings
V1280 Sco is an Fe II nova.
It exhibits the slowest spectroscopic evolution recorded.
Dust shell formation caused rapid early decline.
Abstract
Photometries of B, V, Rc, Ic, y, J, and Ks bands and low dispersion optical spectroscopic observations of Nova V1280 Sco, started soon after the outburst, are reported. We show that V1280 Sco is an Fe II nova and it is going through the historically slowest spectroscopic evolution. The rapid decline observed in the early phase was caused by formation of a dust shell. We estimate the abundances of CNO using the absorption lines on a spectrum at pre-maximum, and find over-abundances by [C/Fe] ~ 1.4, [N/Fe] > 2.0 and [O/Fe] ~ 1.1.
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Taxonomy
TopicsAstrophysical Phenomena and Observations · High-pressure geophysics and materials · Atomic and Molecular Physics