Five-colour photometry of EV Lacertae flares

Details Five-colour photometry of EV Lacertae flares Five-colour photometry of EV Lacertae flares

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...75...53p&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 75, no. 1, Oct. 1988, p. 53-65.

Astronomy and Astrophysics

Astronomy

9

Colorimetry, Electrophotometry, Flare Stars, Stellar Flares, Brightness, Infrared Astronomy, Near Infrared Radiation, Spectral Bands, Time Dependence

Scientific paper

This paper presents 14.1 hours of monitoring of EV Lac simultaneously in the UBVRI spectral bands. A total of 22 flares were observed and analyzed. The results provide strong evidence of time-dependence of the flare colors from the two largest flares. The (U-B)f color reaches the value of -1.6 before the maximum brightness, from where it changes to -0.5 toward the end of the flare. The evolution of the flare colors consists of four phases of color changes in the sequence bluer-redder-bluer-redder. These phases correspond to brightness changes from slow initial increase to rapid rise toward maximum to steep fall after maximum to final intensity decay. The nebular theories of Gershberg (167) and Kunkel (1970) appear to provide a reasonable fit to the second and third phases. Flare amplitudes in the near-IR are definitely positive for the two largest flares, while for the rest of the flares they are not detectable.

Affiliated with

Also associated with

No associations

Rating

Five-colour photometry of EV Lacertae flares does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Five-colour photometry of EV Lacertae flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Five-colour photometry of EV Lacertae flares will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1597489