Solar type II and type IV radio bursts observed during 1998-2000 with the ARTEMIS-IV radiospectrograph

Details Solar type II and type IV radio bursts observed during 1998-2000 with the ARTEMIS-IV radiospectrograph Solar type II and type IV radio bursts observed during 1998-2000 with the ARTEMIS-IV radiospectrograph

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...413.1125c&link_type=abstract

Astronomy and Astrophysics, v.413, p.1125-1133 (2004)

Astronomy and Astrophysics

Astrophysics

13

Astronomical Data Bases: Miscellaneous, Catalogs, Sun: Activity, Sun: Corona, Sun: Flares, Sun: Radio Radiation

Scientific paper

A catalogue of the type II and type IV solar radio bursts in the 110-687 MHz range, observed with the radio spectrograph ARTEMIS-IV operated by the University of Athens at Thermopylae, Greece from 1998-2000 is presented. These observations are compared with the LASCO archives of Coronal Mass Ejections and the Solar Geophysical Reports of solar flares (Hα & SXR) and examined for possible associations. The main results are:
68% of the catalogue events were associated with CMEs.
67% of the type II events were associated with CMEs, in accordance with previous results. This percentage rises to 79% in the case of composite type II/IV events.
77% of the type IV continua were associated with CMEs, which is higher that the CME-type II association probability.
The type II associated CMEs had an average velocity of (835 ± 380) km s-1, while the CMEs not associated with type IIs had an average velocity of (500 ± 150) km s-1.
All events, but one, were well associated with H\alpha and/or SXR flares.
Most of the CME launch times precede by 5-60 min (30 min on average) the associated SXR flare peak; an important fraction (72%) precede the flare onset as well.
Appendix A is only available in electronic form at http://www.edpsciences.org

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