Skip to main content
×
×
Home

Scattering Polarisation of the d-States of Ions and Solar Magnetic Field: Effects of Isotropic Collisions

  • M. Derouich (a1) (a2), H. Basurah (a1) and B. Badruddin (a1)
Abstract
Abstract

Analysis of solar magnetic fields using observations as well as theoretical interpretations of the scattering polarisation is commonly designated as a high priority area of the solar research. The interpretation of the observed polarisation raises a serious theoretical challenge to the researchers involved in this field. In fact, realistic interpretations need detailed investigations of the depolarising collisions.

The goal of this paper is to determine new relationships which allow the calculation of any collisional rates of the d-levels of ions by simply determining the value of n* and E p without the need of determining treating the collisional problem.

In this work, we applied our collisional code to a large number of cases involving complex and simple ions. After that, the results are injected in a genetic programming code in order to infer original relationships which will be of great help to solar applications. We discussed the accuracy of our collisional rates in the cases of complex atoms and atoms with hyperfine structure.

We compared the results obtained through the new relationships with the results obtained directly by running our code of collisions. The percentage of error is about 10% in the average value.

Copyright
Corresponding author
3 Email: aldarwish@edu.kau.sa
References
Hide All
Allard N., & Kielkopf J. 1982, RvMP, 54, 1103
Anstee S. D. 1992, Ph.D. Thesis, Univ. Queensland
Anstee S. D., & O’Mara B. J. 1991, MNRAS, 253, 549
Anstee S. D., & O’Mara B. J. 1995, MNRAS, 276, 859
Anstee S. D., O’Mara B. J., & Ross J. E. 1997, MNRAS, 284, 202
Asplund M. 2005, ARA&A, 43, 481
Baird J. P., Eckart M. J., & Sanderman R. J. 1979, JPhB, 12, 355
Barklem P. S. 2016, A&ARv, 24, 54
Barklem P. S., & O’Mara B. J. 1997, MNRAS, 290, 102
Barklem P. S. 1998, Ph.D. Thesis, Univ. Queensland
Barklem P. S., Anstee S. D., & O’Mara B. J. 1998, PASA 15, 336
Barklem P. S., & O’Mara B. J. 1998, MNRAS, 300, 863
Beigman I. L., & Lebedev V. S. 1995, PhR, 250, 95
Bivona S., Burlon R., Ferrante G., & Leone C. 2005, JPhB, 38, 131
Chambaud G., & Lévy B. 1989, JPhB, 22, 3155
Deb C., & Derouich M. 2014, A&A, 572, 6
Derouich M. 2004, Ph.D. Thesis, Paris VII-Denis Diderot University
Derouich M. 2008, A&A, 481, 845
Derouich M. 2017, NewA, 51, 32
Derouich M., & Barklem P. S. 2007, A&A, 462, 1171
Derouich M., Barklem P. S., & Sahal-Bréchot S. 2005a, A&A, 441, 395
Derouich M., Bommier V., Malherbe J. M., & Landi Degl’Innocenti E. 2006, A&A, 457, 1047
Derouich M., Radi A., & Barklem P. S. 2015, A&A, 584, 8
Derouich M., Sahal-Bréchot S., & Barklem P. S. 2003a, A&A, 409, 369
Derouich M., Sahal-Bréchot S., & Barklem P. S. 2004, A&A, 426, 707
Derouich M., Sahal-Bréchot S., & Barklem P. S. 2005b, A&A, 434, 779
Derouich M., Sahal-Bréchot S., Barklem P. S., & O’Mara B. J. 2003b, A&A, 404, 763
Derouich M., Trujillo Bueno J., & Manso Sainz R. 2007, A&A, 472, 269
Faurobert M., Derouich M., Bommier V., & Arnaud J. 2009, A&A, 493, 201
Gandorfer A. 2000, The Second Solar Spectrum: A High Spectral Resolution Polarimetric Survey of Scattering Polarization at the Solar Limb in Graphical Representation, Vol. 1: 4625 Å to 6995 Å (Zurich: Hochschulverlag AG an der ETH Zurich)
Gandorfer A. 2002, The Second Solar Spectrum: A High Spectral Resolution Polarimetric Survey of Scattering Polarization at the Solar Limb in Graphical Representation, Vol. 2: 3910 Å to 4630 Å (Zurich: Hochschulverlag AG an der ETH Zurich)
Gandorfer A. 2005, The Second Solar Spectrum: A High Spectral Resolution Polarimetric Survey of Scattering Polarization at the Solar Limb in Graphical Representation, Vol. 3: 3160 Å to 3915 Å (Zurich: Hochschulverlag AG an der ETH Zurich)
Kerkeni B., & Bommier V. 2002, A&A, 394, 707
Krems R. V., & Dalgarno A. 2004, in Fundamental World of Quantum Chemistry, Vol. 3, eds. Kryachko, E., & Brandas, E. (Dordrecht: Kluwer), 273
Krsljanin V., & Peach G. 1993, in Spectral Line Shapes, Vol. 7, eds. Stamm, R., & Talin, B. (New York: Nova Science), 527
Landi Degl’Innocenti E. 1983, SoPh, 85, 33
Leininger T., Gadéa F. X., & Dickinson A. S. 2000, JPhB, 33 1805
Lemaire J. L., Chotin J. L., & Rostas F. 1985, JPhB, 18 95
Manso Sainz R., Landi Degl’Innocenti E., & Trujillo Bueno J. 2006, A&A, 447, 1125
Nienhuis G. 1976, JPhB, 9, 167
Omont A. 1977, PQE, 5, 69
Sahal-Bréchot S. 1977, ApJ, 213, 887
Sahal-Bréchot S., Derouich M., Bommier V., & Barklem P. S. 2007, A&A, 465, 667
Sahal-Bréchot S., Malinovsky M., & Bommier V. 1986, A&A, 168, 284
Smith E. W., Vidal C. R., & Cooper J. 1969, Classical path methods in line broadening, I. Classical path approximation, JRNBS, 389, 73A(4)
Stenflo J. O. 1982, SoPh, 80, 209
Stenflo J. O. 2004, Nature, 430, 304
Trujillo Bueno J., Shchukina N., & Asensio Ramos A. 2004, Nature, 430, 326
Volpi R., & Bohn J. L. 2002, PhRvA, 65, 052712
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Publications of the Astronomical Society of Australia
  • ISSN: 1323-3580
  • EISSN: 1448-6083
  • URL: /core/journals/publications-of-the-astronomical-society-of-australia
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 1
Total number of PDF views: 10 *
Loading metrics...

Abstract views

Total abstract views: 76 *
Loading metrics...

* Views captured on Cambridge Core between 17th April 2017 - 22nd January 2018. This data will be updated every 24 hours.