Cosmogenic radionuclides as signatures of past Solar storm events

Simple item page
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorWilcken, KMen_AU
dc.contributor.authorSimon, KJen_AU
dc.contributor.authorDee, MWen_AU
dc.contributor.authorKuitems, Men_AU
dc.contributor.authorScifo, Aen_AU
dc.contributor.authorMoy, Aen_AU
dc.contributor.authorCurran, MAJen_AU
dc.contributor.authorWallner, Aen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorFujioka, Ten_AU
dc.date.accessioned2023-06-23T01:53:22Zen_AU
dc.date.available2023-06-23T01:53:22Zen_AU
dc.date.issued2019-09-09en_AU
dc.date.statistics2023-04-12en_AU
dc.description.abstractThis collaborative project examines the relationship between the ‘Carrington Event’ (CE), the largest solar storm of modern times, and two recently discovered cosmic radiation events of greater magnitude, the ‘Miyake Events’ (ME). The intention is to construct cosmogenic isotope (14C, 10Be and 36Cl) profiles across the CE, so they can be compared with similar data that have already been obtained for the ME. We will use ice cores from Law Dome, East Antarctica, collected under Australian Antarctic Science awards, for the 10Be and 36Cl analyses. The large diameter DSS0506 ice core will permit high-resolution measurements at ANSTO of 10Be and 36Cl across the CE. Furthermore, we also intend to measure 10Be and 36Cl in the main DSS ice core across the ME. These measurements will complement existing data as both isotopes will be measured in the same ice core for each event for the first time and at high temporal resolution. New tree rings spanning the CE and ME, sourced from the Oxford Dendrochronology Laboratory, have been measured for 14C at the University of Groningen at mostly annual resolution. The ultimate goal of this study is to determine whether or not all three events are manifestations of the same phenomena. A secondary goal is to provide a check on the independent DSS-main ice core chronology. The CE of 1859 is known from geomagnetic data and contemporary records of the aurorae, which were observed as far south as the tropics. The event predated ground-based neutron detectors and routine cosmogenic isotope measurement, so the intensity of the incident particle radiation is still a matter of conjecture. Indeed, this question has been thrown into sharp focus recently by new discoveries in palaeoastronomy. Analyses of natural archives (tree-rings and ice-cores) have revealed that production of the cosmogenic isotopes 14C, 10Be and 36Cl spiked dramatically in the years 774-775 AD and 993-994 AD. Such anomalies could only have been generated by sudden bursts of cosmic radiation. Several sources were initially proposed for the radiation, however, the consensus now is that they were driven by solar activity. Here we discuss progress with the measurement of the cosmogenic radioisotopes and consider how the relative production rates of the cosmogenic radioisotopes may be used to substantiate a solar cause for the historical radiation events and to infer the spectral hardness of the initiating solar protons. © The Authors.en_AU
dc.identifier.citationSmith, A. M., Wilcken, K., Simon, K., Dee, M., Kuitems, M., Scifo, A., Moy, A., Curran, M., Wallner, A., Fink, D., & Fujioka, T. (2019). Cosmogenic radionuclides as signatures of past Solar storm events. Paper presented to the Heavy Ion Accelerator Symposium on Fundamental and Applied Science - 2019, Department of Nuclear Physics, Australian National University, Canberra, Australia, 9-13 September 2019. (pp. 66). Retrieved from: http://hias.anu.edu.au/2019/_files/2019_HIAS_BookOfAbstracts.pdfen_AU
dc.identifier.conferenceenddate13 September 2019en_AU
dc.identifier.conferencenameHeavy Ion Accelerator Symposium on Fundamental and Applied Science -2019en_AU
dc.identifier.conferenceplaceCanberra, Australiaen_AU
dc.identifier.conferencestartdate9 September 2019en_AU
dc.identifier.pagination66en_AU
dc.identifier.urihttp://hias.anu.edu.au/2019/_files/2019_HIAS_BookOfAbstracts.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15062en_AU
dc.language.isoenen_AU
dc.publisherAustralian National Universityen_AU
dc.subjectAstrophysicsen_AU
dc.subjectBeryllium 10en_AU
dc.subjectCarbon 14en_AU
dc.subjectChlorine 36en_AU
dc.subjectCosmic photonsen_AU
dc.subjectIce capsen_AU
dc.subjectSolar activityen_AU
dc.subjectCosmic radiationen_AU
dc.subjectElementary particlesen_AU
dc.subjectIonizing radiationen_AU
dc.titleCosmogenic radionuclides as signatures of past Solar storm eventsen_AU
dc.typeConference Abstracten_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2019_HIAS_BookOfAbstracts-1.pdf
Size:
15.59 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications