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arXiv · 2012.10705

Photometric and spectroscopic analysis of Comet 29P/Schwassmann-Wachmann 1 activity

O. V. Ivanova·I. V. Luk'yanyk·N. N. Kiselev·V. L. Afanasiev·E. Picazzi·O. Cavichia·A. A. de Almeida·S. M. Andrievsky
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Abstract

We carried out photometric and spectroscopic observations of comet 29P/Schwassmann-Wachmann 1 at the 6-m BTA telescope (SAO RAS, Russia) and the 1.6-m telescope of the National Laboratory for Astro-physics (LNA, Brazil) on February 20, 2012, and on May 31, 2011, respectively. The spectra revealed the presence of CO+ and N2+ emissions in the cometary coma at a distance of 5.25 AU from the Sun. The ratio [N2+]/[CO+] within the projected slit is 0.013. The images obtained through BVR filters showed a bright, dust coma, indicating a high level of activity. We estimated a colour index and a colour excess for the comet. The parameter Af\r{ho}, which is used as an indicator of a cometary activity, was measured to be 2584 cm in the reference optical aperture of \r{ho}=10^4 km. The dust production constituted 33 kg/s and 9.3*10^3 kg/s, it was obtained using different methods. We also investigated the morphology of the comet using image enhancement techniques and found two jets in the coma.

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O. V. Ivanova, I. V. Luk'yanyk, N. N. Kiselev, V. L. Afanasiev, E. Picazzi, O. Cavichia, A. A. de Almeida, S. M. Andrievsky. 2020-12-19. Photometric and spectroscopic analysis of Comet 29P/Schwassmann-Wachmann 1 activity. https://doi.org/10.1016/j.pss.2015.12.001

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