1 / 6

Upstream events at a record distance of 0.3 AU from the bow-shock

This study examines the detection of proton upstream events at a record distance of 0.3 AU from Earth during slow solar wind and weak geomagnetic activity. Doubts arise regarding the origin of these events due to the favorable conditions.

clinta
Download Presentation

Upstream events at a record distance of 0.3 AU from the bow-shock

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Upstreamevents at a record distance of 0.3 AU from the bow-shock A. Klassen, R. Müller-Mellin, R. Gomez-Herrero University of Kiel, Germany SEPT onboard STEREO-A detected strong upstream proton events at a distance of 0.29 AU from Earth. The events were observed during slow solar wind (280 km/s) and during weak geomagnetic activity (Kp < 1) on 13 and 14 September 2007. STEREO SWG#17, 13-14 November 2007, Caltech

  2. Dynamic spectrum of Upstream Events and “small” CIR SEPT_AntiSun SEPT_Sun

  3. Spacecraft position and magnetic field orientation during the upstream event on 13 Sept. 2007

  4. Spectra of upstream event on 13 September 2007 showing significant anisotropy SEPT_AntiSun SEPT_Sun;North;South

  5. Results • Detection of proton upstream events at STEREO-A on 13-14 September 2007 far away from Earth (0.29 AU), one day before CIR. • Upstream events were observed during slow solar wind Vsw= ~ 280 km/s and low geoactivity (Kp<1). • Similar upstream event was observed also on 13 October 2007 at STEREO-B at a distance of 0.3 AU from Earth. Question Are these upstream events really originating near Earth? Doubts arise because the events occur during slow solar wind and quiet geomagnetic conditions.

More Related