Reconstructing CME Structures from IPS Observations Using a Phenomenological Model
نویسندگان
چکیده
We present an extension of the Tappin – Howard (TH) phenomenological model (Tappin and Howard, Space Sci. Rev. 147, 55, 2009) for coronal mass ejection reconstruction to use interplanetary scintillation g-map data. The necessary changes to the model are discussed. We then use the modified model to reconstruct two major interplanetary disturbances observed using the Cambridge 3.6 ha Array in September 1980. We find that despite the lower cadence of IPS observations compared with white-light imagers, a consistent reconstruction can be generated which is in agreement with in-situ measurements and solar observations.
منابع مشابه
Tracking heliospheric disturbances by interplanetary scintillation
Coronal mass ejections are known as a solar cause of significant geospace disturbances, and a fuller elucidation of their physical properties and propagation dynamics is needed for space weather predictions. The scintillation of cosmic radio sources caused by turbulence in the solar wind (interplanetary scintillation; IPS) serves as an effective ground-based method for monitoring disturbances i...
متن کاملA comparison of mean density and microscale density fluctuations in a CME at 10 R
[1] We have observed intensity scintillation (IPS) of the radio source 0854 + 201 at 8 GHz on August 2, 2000 during the passage of a coronal mass ejection (CME) across the line of sight. The source was at a distance of 10 R over the north solar pole. Simultaneous observations with the LASCO C3 instrument allow us to model the mean density Ne and the microscale density fluctuations dNewithin the...
متن کاملCME Propagation Characteristics from Radio Observations
We explore the relationship among three coronal mass ejections (CMEs), observed on 28 October 2003, 7 November 2004, and 20 January 2005, the type II burst-associated shock waves in the corona and solar wind, as well as the arrival of their related shock waves and magnetic clouds at 1 AU. Using six different coronal/interplanetary density models, we calculate the speeds of shocks from the frequ...
متن کاملSmall-scale structures in Compact Steep-Spectrum and GHz-Peaked-Spectrum radio sources
We determine the small-scale structure for a large sample of Compact Steep Spectrum (CSS) and Gigahertz Peaked Spectrum (GPS) sources and a sample of larger radio sources at 327 MHz using the technique of Inter-Planetary Scintillation (IPS) with the Ooty Radio Telescope. Our observations provide structural information on angular scales ranging from about 50 to a few hundred milliarcsec. We esti...
متن کاملApplication of a new phenomenological coronal mass ejection model to space weather forecasting
[1] Recent work by the authors has produced a new phenomenological model for coronal mass ejections (CMEs). This model, called the Tappin‐Howard (TH) Model, takes advantage of the breakdown of geometrical linearity when CMEs are observed by white‐light imagers at large distances from the Sun. The model extracts 3‐D structure and kinematic information on the CME using heliospheric image data. Th...
متن کامل