Simultaneous EUVE and IUE Flares from the Flare Star EV Lac

Details Simultaneous EUVE and IUE Flares from the Flare Star EV Lac Simultaneous EUVE and IUE Flares from the Flare Star EV Lac

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.2103p&link_type=abstract

American Astronomical Society, 186th AAS Meeting, #21.03; Bulletin of the American Astronomical Society, Vol. 27, p.838

Astronomy and Astrophysics

Astronomy

3

Scientific paper

The active dM4.5e flare star EV Lac was observed in September 1993 simultaneously with the IUE and EUVE satellites. One large and three small flares are present in the EUVE Deep Survey coronal light curve. Factor ~ 4 enhancements in the C IV lambda 1550 transition region light curve are present for both the largest DS flare and a smaller one 17 h later. The C IV increase clearly precedes the DS flare for one, and possibly both, DS events, while Mg II lambda 2800 chromospheric enhancements coincide (within errors) with the DS peaks as expected for the gradual phase of a flare. Constraints on the durations and energetics of the flares will be discussed.

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