Pushing the Boundaries: Solar Physics in an Era of High Spatial and Temporal Resolution
Lead Research Organisation:
Queen's University Belfast
Department Name: Sch of Mathematics and Physics
Abstract
The Sun is the most important astronomical object for humankind, with solar activity driving 'space weather' and having a profound effect on the environment and communications. Here on Earth, we can see directly the effects of the Sun's radiation through fascinating sights such as the aurora. However, currently the power behind the Sun's activity cannot be predicted, or indeed fully explained. Most would expect that as you move away from a fierce heat source, such as a naked flame, the temperature will drop significantly. However, one of the greatest paradoxes plaguing solar-system scientists is the fact that the outer atmosphere of the Sun is much hotter than its surface! An increase in temperature from around 6000 degrees to well over one million degrees as you travel away from the surface belies common sense and has remained at the forefront of solar-system research for over 50 years. Many theories have been proposed in an attempt to understand the inner workings of this complex dynamical system, producing two distinct classes of theory: flare events and wave heating. The former suggests that rapidly occurring, small explosive events in the atmosphere of the Sun may cause the observed steep temperature gradient. The latter relies on the generation of magneto-hydrodynamic (MHD) waves which propagate upwards from the surface of the Sun and dissipate in the corona. A good analogy is to imagine ocean waves travelling across the vast seas before finally releasing their energy when they splash up against a rocky coastline. Theory suggests that MHD waves generated near the surface of the Sun through the continual churning of plasma may propagate upwards if the conditions are correct, ultimately dissipating their energy and heating the outer solar atmosphere. As an STFC Postdoctoral Fellow at QUB, I will utilize modern ground- and space-based telescopes containing a wide assortment of high resolution instruments. The observational component of my research programme will focus on the distinction of individual MHD waves, which will allow key characteristics to be evaluated. These include the mode of oscillation (longitudinal, transverse, etc.), the velocity, the direction and of course, the energy. I will compare these values to those specific for atmospheric heating of the Sun, thus allowing the current theoretical heating models described above to be validated or refuted. Computer simulations will also be implemented to validate observational methodologies and accuracy, culminating in much refined models of the solar atmosphere. With the rapid advancements made in the field of solar physics over the last number of years (better telescopes, detectors and computers), the ability to finally resolve the atmospheric heating paradox is now a reality and that is what I will strive to do as an STFC Postdoctoral Fellow.
Publications
Ballai I
(2011)
TRACE observations of driven loop oscillations
in Astronomy & Astrophysics
Christian D
(2011)
THE SEARCH FOR SUPER-SATURATION IN CHROMOSPHERIC EMISSION
in The Astrophysical Journal
Crockett P
(2009)
Automated detection and tracking of solar magnetic bright points
in Monthly Notices of the Royal Astronomical Society
Crockett P
(2010)
THE AREA DISTRIBUTION OF SOLAR MAGNETIC BRIGHT POINTS
in The Astrophysical Journal
Fedun V
(2011)
FREQUENCY FILTERING OF TORSIONAL ALFVÉN WAVES BY CHROMOSPHERIC MAGNETIC FIELD
in The Astrophysical Journal
Jess D
(2012)
PROPAGATING WAVE PHENOMENA DETECTED IN OBSERVATIONS AND SIMULATIONS OF THE LOWER SOLAR ATMOSPHERE
in The Astrophysical Journal
Jess D
(2010)
MICROFLARE ACTIVITY DRIVEN BY FORCED MAGNETIC RECONNECTION
in The Astrophysical Journal
Jess D
(2012)
THE ORIGIN OF TYPE I SPICULE OSCILLATIONS
in The Astrophysical Journal
Jess D
(2010)
A STUDY OF MAGNETIC BRIGHT POINTS IN THE Na I D 1 LINE
in The Astrophysical Journal
Jess D
(2010)
ROSA: A High-cadence, Synchronized Multi-camera Solar Imaging System
in Solar Physics
Description | This research documented the detection and tracking of various wave modes through the lower solar atmosphere. The observations obtained from leading ground-based observatories provided unprecedentedly high resolution observations of magnetic elements, and these were shown to carry highly energetic waves upwards through the Sun's tenuous atmosphere. For the first time we showed how waves can convert their mode of oscillation and couple into dynamic phenomena that are omnipresent over the entire solar atmosphere. |
Exploitation Route | Others may drive forward the research started in this grant by incorporating other portions of the electromagnetic spectrum, such as the UV and extreme-UV. The techniques used could be refined by employing modern CPU and GPU algorithms to speed up processing times and help expedite scientific publication. |
Sectors | Aerospace Defence and Marine Digital/Communication/Information Technologies (including Software) Education Other |
URL | http://star.pst.qub.ac.uk/~dbj |
Description | The research undertaken in this grant has resulted in numerous public outreach and social events which have helped to raise the awareness of science to the general public. We have participated in numerous high-impact national events such as Stargazing Live and Jupiter Watch which attracted thousands of the general public. |
First Year Of Impact | 2009 |
Sector | Aerospace, Defence and Marine,Digital/Communication/Information Technologies (including Software),Education,Other |
Impact Types | Cultural Societal |
Description | Royal Society Research Grant |
Amount | £15,000 (GBP) |
Organisation | The Royal Society |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 03/2010 |
End | 03/2011 |
Description | Astronomy Now |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Public/other audiences |
Results and Impact | I was voted one of the top 5 "Astronomers of the Future" by Astronomy Now magazine, and they wrote a multi-page article about my research in their monthly magazine. Many emails and telephone calls followed with interested parties asking questions about my research. |
Year(s) Of Engagement Activity | 2010 |
Description | BBC programme Science in Action |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Public/other audiences |
Results and Impact | Participated in a BBC radio programme "Science in Action" where the role of my research was discussed with listeners. Many emails and telephone calls followed from people interested in my research. |
Year(s) Of Engagement Activity | 2010 |
Description | BBC programme What's Next? |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Geographic Reach | National |
Primary Audience | Public/other audiences |
Results and Impact | Was interviewed for BBC programme "What's Next?" regarding the increase in solar activity. Have been asked to do subsequent radio interviews for the BBC. |
Year(s) Of Engagement Activity | 2010 |
Description | Daily Telegraph |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Geographic Reach | National |
Primary Audience | Public/other audiences |
Results and Impact | I wrote an article which was published in the Daily Telegraph concerning solar activity. Much interest from amateur and professional astronomers followed. |
Year(s) Of Engagement Activity | 2010 |
Description | Irish Astronomical Association |
Form Of Engagement Activity | Participation in an open day or visit at my research institution |
Part Of Official Scheme? | No |
Geographic Reach | Regional |
Primary Audience | Public/other audiences |
Results and Impact | 80 amateur astronomers attended a talk on recent solar activity, which sparked questions and discussion afterwards. Have subsequently been asked to attend a general meeting to help raise interest among young people. |
Year(s) Of Engagement Activity | 2010 |
Description | School Visit |
Form Of Engagement Activity | Participation in an open day or visit at my research institution |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Schools |
Results and Impact | 40 pupils attended a talk on the role of our Sun in the solar system, which sparked questions and discussion afterwards. School reported higher numbers of students interested in work experience in a university environment. |
Year(s) Of Engagement Activity | 2010 |