The 1979 minimum state of an Ursae Majoris

Details The 1979 minimum state of an Ursae Majoris The 1979 minimum state of an Ursae Majoris

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..232l&link_type=abstract

Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 232-241.

Astronomy and Astrophysics

Astrophysics

27

Binary Stars, Circular Polarization, Magnetic Stars, Stellar Magnitude, Stellar Spectrophotometry, Constellations, Cyclotron Radiation, Ephemerides, H Alpha Line, H Beta Line, Harmonic Radiation, Interstellar Extinction, Light Curve, Mass Transfer, Polarimetry, Visual Photometry

Scientific paper

Spectrophotometry, photometry, and circular polarimetry are reported of the magnetic binary AN UMa during February/March 1979, when it reached a very low state of B (approximately 19-20), 2 mag fainter than ever observed previously. The B light curve was generally similar in shape to that for the high state, although only approximately 0.6 of a period was covered. The energy distribution became markedly redder compared with that in higher states; the I magnitude had dropped only to about 17. The low-state I-band circular polarization reached a peak value of -35%, which is considerably stronger than in the high state; the presumed cyclotron funnel source thus remained dominant, at least at red wavelengths. The spectrophotometry at V approximately 17.5-18.5 revealed a red continuous energy distribution; there was weak H-alpha emission, a probable very broad emission feature near H-beta, but no evidence for strong absorption features from the secondary or magnetic primary.

Affiliated with

Also associated with

No associations

Rating

The 1979 minimum state of an Ursae Majoris 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 The 1979 minimum state of an Ursae Majoris, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 1979 minimum state of an Ursae Majoris will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1015297