Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100222488> ?p ?o ?g. }
- W3100222488 endingPage "A142" @default.
- W3100222488 startingPage "A142" @default.
- W3100222488 abstract "Global magnetic fields of active solar-like stars are nowadays routinely detected with spectropolarimetric measurements and are mapped with Zeeman-Doppler imaging (ZDI). However, due to the cancellation of opposite field polarities, polarimetry captures only a tiny fraction of the magnetic flux and cannot assess the overall stellar surface magnetic field if it is dominated by a small-scale component. Analysis of Zeeman broadening in high-resolution intensity spectra can reveal these hidden complex magnetic fields. Historically, there were very few attempts to obtain such measurements for G dwarf stars due to the difficulty of disentangling Zeeman effect from other broadening mechanisms affecting spectral lines. Here we developed a new magnetic field diagnostic method based on relative Zeeman intensification of optical atomic lines with different magnetic sensitivity. Using this technique we obtained 78 field strength measurements for 15 Sun-like stars, including some of the best-studied young solar twins. We find that the average magnetic field strength $Bf$ drops from 1.3-2.0 kG in stars younger than about 120 Myr to 0.2-0.8 kG in older stars. The mean field strength shows a clear correlation with the Rossby number and with the coronal and chromospheric emission indicators. Our results suggest that magnetic regions have roughly the same local field strength $Bapprox3.2$ kG in all stars, with the filling factor $f$ of these regions systematically increasing with stellar activity. Comparing our results with the spectropolarimetric analyses of global magnetic fields in the same stars, we find that ZDI recovers about 1% of the total magnetic field energy in the most active stars. This figure drops to just 0.01% for the least active targets." @default.
- W3100222488 created "2020-11-23" @default.
- W3100222488 creator A5008688551 @default.
- W3100222488 creator A5037717341 @default.
- W3100222488 creator A5048238323 @default.
- W3100222488 creator A5056341479 @default.
- W3100222488 date "2020-03-01" @default.
- W3100222488 modified "2023-10-04" @default.
- W3100222488 title "Hidden magnetic fields of young suns" @default.
- W3100222488 cites W1675262974 @default.
- W3100222488 cites W1932775044 @default.
- W3100222488 cites W1964842941 @default.
- W3100222488 cites W1969127579 @default.
- W3100222488 cites W1970794268 @default.
- W3100222488 cites W1972226679 @default.
- W3100222488 cites W1973433671 @default.
- W3100222488 cites W1976470783 @default.
- W3100222488 cites W1977738166 @default.
- W3100222488 cites W1979218713 @default.
- W3100222488 cites W1984943376 @default.
- W3100222488 cites W1989885283 @default.
- W3100222488 cites W1990533388 @default.
- W3100222488 cites W1990596442 @default.
- W3100222488 cites W1990724464 @default.
- W3100222488 cites W1990786080 @default.
- W3100222488 cites W1994627179 @default.
- W3100222488 cites W2016829144 @default.
- W3100222488 cites W2017326978 @default.
- W3100222488 cites W2028789710 @default.
- W3100222488 cites W2031043816 @default.
- W3100222488 cites W2031289192 @default.
- W3100222488 cites W2038940646 @default.
- W3100222488 cites W2044183576 @default.
- W3100222488 cites W2044409883 @default.
- W3100222488 cites W2045984796 @default.
- W3100222488 cites W2060147469 @default.
- W3100222488 cites W2063958897 @default.
- W3100222488 cites W2068843564 @default.
- W3100222488 cites W2073981879 @default.
- W3100222488 cites W2075873833 @default.
- W3100222488 cites W2082329580 @default.
- W3100222488 cites W2085416326 @default.
- W3100222488 cites W2085729175 @default.
- W3100222488 cites W2089820319 @default.
- W3100222488 cites W2094450965 @default.
- W3100222488 cites W2096688555 @default.
- W3100222488 cites W2098479840 @default.
- W3100222488 cites W2103204974 @default.
- W3100222488 cites W2105179377 @default.
- W3100222488 cites W2106683991 @default.
- W3100222488 cites W2117914263 @default.
- W3100222488 cites W2125312481 @default.
- W3100222488 cites W2127400668 @default.
- W3100222488 cites W2130211162 @default.
- W3100222488 cites W2133437999 @default.
- W3100222488 cites W2136337051 @default.
- W3100222488 cites W2144219585 @default.
- W3100222488 cites W2150759470 @default.
- W3100222488 cites W2150768895 @default.
- W3100222488 cites W2161866432 @default.
- W3100222488 cites W2163060535 @default.
- W3100222488 cites W2225034437 @default.
- W3100222488 cites W2316839852 @default.
- W3100222488 cites W2343949032 @default.
- W3100222488 cites W2413095765 @default.
- W3100222488 cites W2474034009 @default.
- W3100222488 cites W2534839824 @default.
- W3100222488 cites W2571971597 @default.
- W3100222488 cites W2609479124 @default.
- W3100222488 cites W2615622359 @default.
- W3100222488 cites W2750959729 @default.
- W3100222488 cites W2763130981 @default.
- W3100222488 cites W2768824768 @default.
- W3100222488 cites W2900004093 @default.
- W3100222488 cites W2921246942 @default.
- W3100222488 cites W2951065049 @default.
- W3100222488 cites W2951662574 @default.
- W3100222488 cites W2963764082 @default.
- W3100222488 cites W2969314006 @default.
- W3100222488 cites W2973003208 @default.
- W3100222488 cites W2978367381 @default.
- W3100222488 cites W2999287978 @default.
- W3100222488 cites W3021448783 @default.
- W3100222488 cites W3023143186 @default.
- W3100222488 cites W3027980903 @default.
- W3100222488 cites W3098111436 @default.
- W3100222488 cites W3098206738 @default.
- W3100222488 cites W3098559794 @default.
- W3100222488 cites W3099029983 @default.
- W3100222488 cites W3100458830 @default.
- W3100222488 cites W3100755360 @default.
- W3100222488 cites W3100985802 @default.
- W3100222488 cites W3101191700 @default.
- W3100222488 cites W3101433878 @default.
- W3100222488 cites W3101617143 @default.
- W3100222488 cites W3101787414 @default.
- W3100222488 cites W3101958364 @default.
- W3100222488 cites W3102059554 @default.