Transient high frequency optical oscillations on three flares of the red dwarf AD Leonis
Abstract
Analysis of patrol observations with high resolution (i.e. 0.108 seconds) of the flare stars EV Lac, YZ CMin and AD Leo indicate that transient high frequency oscillations occur during the flare event and during the quiet-star phase as well. The postulation that this is a general characteristic of the active red dwarfs is a very important task. In this paper we present the results of a reappraisal of the older observations of the dM4.5e star AD Leonis in the U-band, Which were performed with much lower resolution (i.e. 1.2 sec). In accordance to the results of the previous studies the results of Discrete Fourier analysis of the present study indicate that: (1) Transient high frequency oscillations occur during the flare event (2) The Observed frequencies range between 0.333Hz (i.e. period of 3 second ) to 0.0193Hz (i.e. period 51.5 seconds)
- Publication:
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JENAM 2011
- Pub Date:
- July 2011
- Bibcode:
- 2011jena.confE..74C
- Keywords:
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- Flare stars;
- High frequency oscillations;
- DFT analysis