Abstract Details
| Name: Ayesha Maryam Mazarbhuiya Affiliation: Ph.D Scholar, Assam Universuty Conference ID: ASI2016_793 Title : Imaging polarimetric study on Comet 32P/Comas-Sola Authors and Co-Authors : 1.Parizath Deb Roy,Assam University 2.Himadri Sekhar Das,Assam University 3.Biman J. Medhi,Aryabhatta Research Institute of Observational Sciences Abstract Type : Oral Abstract Category : Sun and the Solar System Abstract : Imaging polarimetric study on Comet 32P/Comas-Sola A. M. Mazarbhuiya 1a , P. Deb Roy 1b , H. S. Das 1c and B. J. Medhi 2 1 Department of Physics, Assam University, Silchar 788011, India 2 Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263129, India a ayesha.hkd@gmail.com, b pari.hkd@gmail.com, c hsdas@iucaa.ernet.in d biman@aries.res.in Abstract Comets are the small celestial body several km in diameter constituted mainly of water, ice and rock. They spend almost all their time at great distances from the Sun. The cometary activity starts when it approaches towards the Sun. In some cases, it becomes brighter and spectacular with coma and tail. Imaging polarimetry of comets gives a well-defined idea about the basic physical properties of cometary dust grains which are present in the coma and undergo a continuous evolution with distance from the nucleus during the entire period of cometary activity. The measurement of polarization of scattered radiation from comets provides an excellent tool to study cometary dust properties. The study of the cometary dusts gives useful information about the leastprocessed and pristine materials of early solar nebulae from which the present-day solar system has been evolved. In this paper, a short periodic Comet 32P/Comas-Sola with an orbital period of 9.5 years is studied through imaging polarimetry .The inclination of the orbit is about 9o.9 with the ecliptic plane. The perihelion distance of the comet was 2.0 AU on 17th October 2014 and its aphelion distance was 7.02 AU. The optical polarimetric observations were carried out during its closest approach to the earth at a distance of about 1.35 au by using 1.04-m Sampurnanand Telescope of Aryabhatta Research Institute of Observational Sciences (ARIES),Nainital on 20 th February, 2015. The polarization values obtained for Comet 32P/Comas sola is found to be almost uniform with the change of aperture which is pointing towards significant dust domination that overpowers the influence of gas. ************************* |