Magnetic field measurements on four yellow supergiants. I

Details Magnetic field measurements on four yellow supergiants. I Magnetic field measurements on four yellow supergiants. I

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap.....48....9p&link_type=abstract

Astrophysics, Volume 48, Issue 1, pp.9-19

Astronomy and Astrophysics

Astrophysics

4

Stars, Activity, Magnetic Field — Stars, Individual, Βaqr, Αaqr, Ɛgem, Ɛpeg, Stars - Activity - Magnetic Field &#X2014, Stars - Individual - Aqr, Aqr, Gem, Peg

Scientific paper

Multiyear high precision measurements of the longitudinal component of the magnetic field (Be) of four supergiants are reported: Aqr (G0 Ib), Aqr (G2 Ib), Gem (G8 Ib), and Peg (K2 Ib). The best measurement accuracy, =0.8 G, was achieved for Peg. A Monte Carlo method was used to test the reliability of the derived measurement errors. The differences between the observational errors and the calculated Monte Carlo errors were 3.2%. For Aqr and Aqr no statistically significant value of the magnetic field was recorded when averaged over a night. For eGem the following overnight average values of the magnetic field were recorded on five nights: 11.1±2.7 G, 9.8±2.5 G, -10.5±3.0 G, 38.1±7.4 G, and 5.3±1.5 G. For Peg the magnetic field recorded over two nights was -5.3±0.9 G and - 2.7±0.8 G.

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