Photometric features near the initial phase of flares on UV Cet-type stars

Details Photometric features near the initial phase of flares on UV Cet-type stars Photometric features near the initial phase of flares on UV Cet-type stars

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....89..123c&link_type=abstract

Astronomy and Astrophysics, vol. 89, no. 1-2, Sept. 1980, p. 123-125.

Astronomy and Astrophysics

Astrophysics

14

Flare Stars, Stellar Radiation, Stellar Spectrophotometry, Parallax, Stellar Luminosity, Ubv Spectra

Scientific paper

The characteristics of wide-band light variations near the initial phase of flares on UV Cet-type stars, as light decrease ("dip") or increase relative to the quiescent star luminosity, are found to be correlated with the flare amplitude, equivalent duration and rise-time to light maximum. These results extend a previous finding by Shevchenko (1973) on flare amplitudes.
U, B and V observations of a few EQ Peg flares show that the star becomes bluer at pre-flare increase and redder at dip minimum; the latter is in qualitative agreement with a purely photospheric effect due to H¯ absorption as suggested by Grinin (1976).

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