polarimetric and photometric observations of split comet C/2001 A2 (LINEAR) |
| |
Authors: | Rosenbush Vera Kiselev Nikolai Velichko Sergey |
| |
Affiliation: | (1) Main Astronomical Observatory of the National Academy of Sciences, 27 Zabolotny Street, 03680 Kyiv, Ukraine;(2) Institute of Astronomy, Kharkiv National University, 35 Sumskaya Street, 61022 Kharkiv, Ukraine |
| |
Abstract: | We present the results of polarimetric and photometricobservations of split Comet C/2001 A2 (LINEAR), which wereobtained at
the 70-cm telescope of the Astronomical Observatoryof Kharkiv National University between 30 June and 31 July 2001.The brightest
fragment of the comet, nucleus B, was observed.Eight narrowband cometary filters in the continuum and in emissionbands and
a wideband red filter have been used. The comet wasobserved through apertures of 88, 33, and 19 arcsec. Polarizationphase
curves were obtained for the continuum and for the firsttime, for NH2(0, 7, 0) emission. The degree of polarization ofthe light scattered by the dust decreases with the increase ofaperture size.
An important temporal variation of the polarizationwith a rotation of the polarization plane was observed at twophase angles
(26.5° and 36.2°). Molecular column densities and production rates of CN, C2,C3, and NH2 species are calculated in the framework of theHaser model. A comparative analysis of the temporal variations ofthe visual
magnitudes, gas and dust production rates, dust colorand polarization are presented. |
| |
Keywords: | Comet C/2001 A2 (LINEAR) comets dust NH2 polarization |
本文献已被 SpringerLink 等数据库收录! |
|