Dust in Comet C/2007 N3 (Lulin)
arXiv:1103.0593 · doi:10.1088/0004-6256/141/6/181
Abstract
We report optical imaging, optical and near-infrared polarimetry, and Spitzer mid-infrared spectroscopy of comet C/2007 N3 (Lulin). Polarimetric observations were obtained in R (0.676 micron) at phase angles from 0.44 degrees to 21 degrees with simultaneous observations in H (1.65 micron) at 4.0 degrees, exploring the negative branch in polarization. Comet C/2007 N3 (Lulin) shows typical negative polarization in the optical as well as a similar negative branch near-infrared wavelengths. The 10 micron silicate feature is only weakly in emission and according to our thermal models, is consistent with emission from a mixture of silicate and carbon material. We argue that large, low-porosity (akin to Ballistic Particle Cluster Aggregates) rather absorbing aggregate dust particles best explain both the polarimetric and the mid-infrared spectral energy distribution.
18 pages, 9 figures, 3 tables
References in corpus (8)
- Spectral Mapping Reconstruction of Extended Sources
- Modeling Porous Dust Grains with Ballistic Aggregates I: Geometry and Optical Properties
- Two different evolutionary types of comets proved by polarimetric and infrared properties of their dust
- A Spitzer Study of Comets 2P/Encke, 67P/Churyumov-Gerasimenko, and C/2001 HT50 (LINEAR-NEAT)
- Optical microvariability properties of BALQSOs
- Mid-Infrared Spectrophotometric Observations of Fragments B and C of Comet 73P/Schwassmann-Wachmann 3
- Polarization of asteroid (387) Aquitania: the newest member of a class of large inversion angle asteroids
- Evidence of Fragmenting Dust Particles from Near-Simultaneous Optical and Near-IR Photometry and Polarimetry of Comet 73P/Schwassmann-Wachmann 3
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