Polarimetric studies of comet Hale-Bopp
| dc.creator | Das, H. S. | |
| dc.creator | Sen, A. K. | |
| dc.date | 2007-05-22 | |
| dc.date.accessioned | 2026-07-07T08:02:52Z | |
| dc.date.available | 2026-07-07T08:02:52Z | |
| dc.description | In the present work, the non-spherical dust grain characteristics of comet Hale-Bopp are studied using the T-matrix method and the modified power law distribution function. It is found that the observed data fits very well with the power index ($α) = - 3$. The best fit values of complex refractive index $(n, k)$ and the aspect ratio (E) at $α= - 3$ are calculated to be $(1.382, 0.035, 0.936)$ and $(1.379, 0.041,0.936)$ at $λ= 0.485 μm$ and $0.684μm$ respectively. Kerola & Larson (K-L) analysed the same comet using the T-matrix method and the power law distribution function ($α= -3$), and found that the prolate grains can explain the observed polarization in a more satisfactory manner as compared to the other shapes. But their analysis could not reproduce the negative polarization branch beyond scattering angle $157^0$. However, the results obtained from the present work successfully generate the expected negative polarization curve beyond $157^0$ and the fitting in this case is much better than K-L's work. So it is concluded from the present study that the use of modified power law distribution function (with $α= - 3$) can fit the observed data in a better way, as compared to the power law distribution function used by previous authors. | |
| dc.description | 6 pages, 2 figures, 2 Tables | |
| dc.identifier | https://arxiv.org/abs/0705.3208 | |
| dc.identifier | http://arxiv.org/abs/0705.3208 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/129372 | |
| dc.subject | Astrophysics | |
| dc.title | Polarimetric studies of comet Hale-Bopp | |
| dc.type | text |