Abstract
view Abstract Citations (33) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The 1979 minimum state of an UMa. Liebert, J. ; Tapia, S. ; Bond, H. E. ; Grauer, A. D. Abstract 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. Publication: The Astrophysical Journal Pub Date: March 1982 DOI: 10.1086/159727 Bibcode: 1982ApJ...254..232L Keywords: 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; Astronomy full text sources ADS | data products SIMBAD (5)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
