Remember Me
Or use your Academic/Social account:


Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Sarkar, Aveek; Walsh, Robert W (2009)
Publisher: University of Chicago Press
Languages: English
Types: Article
Subjects: F500, Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Determining the preferred spatial location of the energy input to solar coronal loops would be an important step forward towards a more complete understanding of the coronal heating problem. Following on from Sarkar & Walsh (2008) this paper presents a short 10e9 cm "global loop" as 125 individual strands, where each strand is modelled independently by a one-dimensional hydrodynamic simulation. The strands undergo small-scale episodic heating and are coupled together through the frequency distribution of the total energy input to the loop which follows a power law distribution with index ~ 2.29. The spatial preference of the swarm of heating events from apex to footpoint is investigated. From a theoretical perspective, the resulting emission measure weighted temperature profiles along these two extreme cases does demonstrate a possible observable difference. Subsequently, the simulated output is folded through the TRACE instrument response functions and a re-derivation of the temperature using different filter-ratio techniques is performed. Given the multi-thermal scenario created by this many strand loop model, a broad differential emission measure results; the subsequent double and triple filter ratios are very similar to those obtained from observations. However, any potential observational signature to differentiate between apex and footpoint dominant heating is possibly below instrumental thresholds. The consequences of using a broadband instrument like TRACE and Hinode-XRT in this way are discussed.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Adamakis, S., Morton-Jones, A. J., & Walsh, R. W. 2008, ArXiv e-prints Arber, T. D., Longbottom, A. W., Gerrard, C. L., & Milne, A. M. 2001, Journal of Computational Physics, 171, 151
    • Aschwanden, M. J., & Nightingale, R. W. 2005, ApJ, 633, 499 Aschwanden, M. J., Nightingale, R. W., & Alexander, D. 2000, ApJ, 541, 1059 Aschwanden, M. J., Schrijver, C. J., & Alexander, D. 2001, ApJ, 550, 1036 Cargill, P. J. 1994, ApJ, 422, 381 Cargill, P. J., & Klimchuk, J. A. 1997, ApJ, 478, 799 Chae, J., Park, Y.-D., Moon, Y.-J., Wang, H., & Yun, H. S. 2002, ApJ, 567, L159 Muller, R., Roudier, T., Vigneau, J., & Auffret, H. 1994, A&A, 283, 232 Noglik, J. B., & Walsh, R. W. 2007, ApJ, 655, 1127 Noglik, J. B., Walsh, R. W., & Cirtain, J. 2008, ApJ, 674, 1191 Parenti, S., Buchlin, E., Cargill, P. J., Galtier, S., & Vial, J.-C. 2006, ApJ, 651, 1219 Priest, E. R., Foley, C. R., Heyvaerts, J., Arber, T. D., Culhane, J. L., & Acton, L. W. 1998, Nature, 393, 545
    • Priest, E. R., Foley, C. R., Heyvaerts, J., Arber, T. D., Mackay, D., Culhane, J. L., & Acton, L. W. 2000, ApJ, 539, 1002
    • Schmelz, J. T., Kashyap, V. L., & Weber, M. A. 2007, ApJ, 660, L157 Schmelz, J. T., Roames, J. K., & Nasraoui, K. 2007, Advances in Space Research, 39, 1497 Ugarte-Urra, I., Warren, H. P., & Brooks, D. H. 2009, ArXiv e-prints Walsh, R. 1999, in ESA Special Publication, Vol. 446, 8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona, ed. J.-C. Vial & B. Kaldeich-Schu¨, 687
    • Warren, H. P. 2006, ApJ, 637, 522 Warren, H. P., Winebarger, A. R., & Hamilton, P. S. 2002, ApJ, 579, L41 Weber, M. A., Schmelz, J. T., DeLuca, E. E., & Roames, J. K. 2005, ApJ, 635, L101 Winebarger, A. R., & Warren, H. P. 2004, ApJ, 610, L129 Winebarger, A. R., Warren, H. P., & Seaton, D. B. 2003, ApJ, 593, 1164
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article