Phase functions of polarization and brightness and the nature of cometary atmosphere particles

Kiselev, N. N.; Chernova, G. P.

doi:10.1016/0019-1035(81)90057-9

Cited by 39 publications

(18 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The negative branch of the polarization phase curve in comets is still not well understood as similar behaviour is observed in other atmosphere-less solar system bodies such as Mercury, the Moon and asteroids (Dollfus & Auriere 1974;Gehrels et al 1987;Zellner & Gradie 1976;Dollfus & Zellner 1979). The similarity in the polarization behaviour of the cometary grains and these types of scattering surfaces was noted by several researchers (Kiselev & Chernova 1981;Myer 1985;Bastien et al 1986;Steigmann & Dodsworth 1987). It should be noted that while the cometary coma is optically thin, atmosphere-less solar system bodies are regolith surfaces and are treated as optically thick systems.…”

Section: On the Nature Of The Grainssupporting

confidence: 67%

Polarization studies of comet C/2000 WM1 (LINEAR)

Joshi

Baliyan

Ganesh

2003

A&A

View full text Add to dashboard Cite

• ) when the polarization is negative and where the data for most of the comets are rather meager. The observations during March were made when the phase angle was ∼47• . Observations were conducted through the IHW narrow band and BVR broad band filters. Based on these polarization observations we infer that the comet C/2000 WM1 belongs to high polarization class i.e. the dusty comet family.

show abstract

Section: On the Nature Of The Grainssupporting

confidence: 67%

Polarization studies of comet C/2000 WM1 (LINEAR)

Joshi

Baliyan

Ganesh

2003

A&A

View full text Add to dashboard Cite

show abstract

“…• (e.g., Kiselev and Chernova, 1981;Meech and Jewitt, 1987;Joshi et al, 2011). In the same range of α, polarimetry reveals generally negative values for the degree of linear polarization; therefore, this phenomenon is often referred to as negative polarization (e.g., Chernova et al, 1993;Levasseur-Regourd et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Light scattering by cometary dust: Large-particle contribution

Zubko

2013

Earth Planet Sp

View full text Add to dashboard Cite

Using the discrete dipole approximation (DDA) and a model of agglomerated debris particles, we study the contribution of large particles on the light scattering by cometary dust. The numerical simulations show that moderately and highly absorbing particles larger than 3 μm do not significantly affect the backscattering phenomena observed at visible wavelengths in comets at phase angles α ≤ 30• , such as the brightness surge and the negative polarization branch. Weakly and non-absorbing particles may play some role even if they are larger than 3 μm; but they are not abundant species in comets. However, the contribution of large particles on polarizations at phase angles α > 30• can be significant, even though they are highly absorbing; simultaneously, the phase dependence of brightness remains insensitive to the contribution of large particles.

show abstract

“…This agrees with the scattering properties of terrestrial less absorptive fly-ash particle (Weiss-Wrana, 1983). (Dumont and Sanchez, 1975;Leinert, 1978): The intensity is clearly enhanced toward backscattering. The degree cf linear polarization reaches a maximum cf 35% at a scattering angle 0 -85°.…”

mentioning

confidence: 94%

Experimental Results on Scattering by Irregular and Meteoritic Dust Particles Related to Photopolarimetry of Zodiacal Light and Comets

Weiss-Wrana

Giese

Zerull

1985

International Astronomical Union Colloquium

View full text Add to dashboard Cite

ABSTRACT. The investigations of light scattering by larger meteoritic and terrestrial single grains (size range 20 urn to 120 urn) demonstrate that the scattering properties of irregularly shaped dark opague particles with very rough surfaces resemble the characteristic features of the empirical scattering function as derived from measurements of the zodiacal light. Purely transparent or translucent irregularly shaped particles show a guite different scattering behaviour. Furthermore irregular and multicomponent fluffy particles in the size range of a few microns were modelled by microwave analog measurements in order to explain positive and negative polarization of the light scattered by cometary dust grains .

show abstract

Phase functions of polarization and brightness and the nature of cometary atmosphere particles

Cited by 39 publications

References 7 publications

Polarization studies of comet C/2000 WM1 (LINEAR)

Polarization studies of comet C/2000 WM1 (LINEAR)

Light scattering by cometary dust: Large-particle contribution

Experimental Results on Scattering by Irregular and Meteoritic Dust Particles Related to Photopolarimetry of Zodiacal Light and Comets

Contact Info

Product

Resources

About