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Dust color variations of comet C/2016 M1 (PanSTARRS)

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Title
Dust color variations of comet C/2016 M1 (PanSTARRS)
Author(s)
Voitko, Anhelina; Evgenij Zubko; Ivanova, Oleksandra; Husárik, Marek; Videen, Gorden
Publication Date
2024-03
Journal
Icarus, v.411
Publisher
Academic Press
Abstract
Our research aims to study the dust environment of comets that are active beyond the snow line. The current work considers dust color variations in the coma of long-period comet C/2016 M1 (PanSTARRS). We observed the comet from July to October 2017 (12 epochs) using a 0.61-m telescope at the Skalnaté Pleso Observatory. The activity of the comet was stable and typical for other long-period comets. Our data show a slight bluing of the comet S'BR = −0.5 ± 0.9% per 1000 Å on August 26 and reddening to S'BR = 6.0 ± 1.4% per 1000 Å on August 28, while during the rest of the observation period, the comet mostly had red color that is typical of other comets; i.e., the average S'BR is equal to 9.5 ± 1.1% per 1000 Å. We have performed modeling of the observed color variations using model agglomerated debris particles. We could reproduce the dust color variations through changes in the dust composition; however, photometric data on their own do not allow us to make a precise conclusion. For instance, the bluest color could be induced by either water-ice, Mg-rich silicate, amorphous carbon, or their mixture. The reddest color is consistent with Mg-Fe silicates and organics. Nevertheless, further study of the comet in terms of polarimetry would yield a more robust conclusion. © 2024
URI
https://pr.ibs.re.kr/handle/8788114/14855
DOI
10.1016/j.icarus.2024.115967
ISSN
0019-1035
Appears in Collections:
Pioneer Research Center for Climate and Earth Science(기후 및 지구과학 연구단) > Planetary Atmospheres Group(행성 대기 그룹) > 1. Journal Papers (저널논문)
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