| Abstract |
V1280Sco is a slow dust-forming nova that appeared only at a distance of 1.6kpc. The evidence of dust formation was reported on 23 days after the discovery. We have carried out mid-infrared photometric and spectroscopic observations of this nova on day 150 with Subaru/COMICS and on days 1272 and 1616 with Gemini-S/TReCS. Then the near- to mid-infrared spectral energy distributions (SEDs) of V1280Sco on days 150, 1272 and 1616 are fitted by multi-components dust emission model. We have found that the astronomical silicate emission features only appear in the spectra obtained on 1272 and 1616, suggesting the later formation of silicate grains in the case of V1280Sco. In this presentation I will discuss the chemical evolution of dust grains formed in the ejecta of nova V1280Sco. |
