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| Content Provider | Springer Nature Link |
|---|---|
| Author | Buitrago Casas, J. C. Martínez Oliveros, J. C. Lindsey, C. Calvo Mozo, B. Krucker, S. Glesener, L. Zharkov, S. |
| Copyright Year | 2015 |
| Abstract | Several mechanisms have been proposed to explain the transient seismic emission, i.e. “sunquakes,” from some solar flares. Some theories associate high-energy electrons and/or white-light emission with sunquakes. High-energy charged particles and their subsequent heating of the photosphere and/or chromosphere could induce acoustic waves in the solar interior. We carried out a correlative study of solar flares with emission in hard X-rays, enhanced continuum emission at 6173 Å, and transient seismic emission. We selected those flares observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) with a considerable flux above 50 keV between 1 January 2010 and 26 June 2014. We then used data from the Helioseismic and Magnetic Imager onboard the Solar Dynamic Observatory to search for excess visible-continuum emission and new sunquakes not previously reported. We found a total of 18 sunquakes out of 75 flares investigated. All of the sunquakes were associated with an enhancement of the visible continuum during the flare. Finally, we calculated a coefficient of correlation for a set of dichotomic variables related to these observations. We found a strong correlation between two of the standard helioseismic detection techniques, and between sunquakes and visible-continuum enhancements. We discuss the phenomenological connectivity between these physical quantities and the observational difficulties of detecting seismic signals and excess continuum radiation. |
| Starting Page | 3151 |
| Ending Page | 3162 |
| Page Count | 12 |
| File Format | |
| ISSN | 00380938 |
| Journal | Solar Physics |
| Volume Number | 290 |
| Issue Number | 11 |
| e-ISSN | 1573093X |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-11-10 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Helioseismology Flares, white-light flares Astrophysics and Astroparticles Atmospheric Sciences Extraterrestrial Physics, Space Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
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