Overlooked astrophysical signatures of axion(-like) particles

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M. Asplund et al., astro-ph/200410214 :measured photospheric abundances ofC, N, O, Ne 25-35% below prediction!Ne/O abundance ratios vs. coronal activity.models incorrectly predict• the depth of the convection zone,• the depth profiles of sound speed and density,• the helium abundanceJ.J. Drake, P. Testa, Nature 436 (2005) 525Stellar spectra are likely dominated by photons fromintense flares. Therefore flare enhanced Ne/O ratios no solution of the problem!J.T. Schmelz et al., ApJ. 634 (2005) L197To rescue the agreement between the SSModel and Helioseismology the radiativeopacity reduction by the downwardrevision of the C,N,O,Ne abundances(which provide a major source of opacityfor the solar interior, which determinesthe internal solar structure and the depthof the convection zone) must becompensated by other elements. Ne isthe only suitable element, since itsphotospheric abundance is not welldetermined due to absence of stronglines; the Ne solar abundance is obtainedeither from solar energetic particles orfrom coronal X-rays or EUV. Also above20 quiet solar Active Regions:Quiet ARs: Ne/Oalso at ~0.15.Flares: enhanced Ne detection (~2x),i.e., some mechanism would preferentiallydredge up Ne from the photosphere!Ne/O = 0.52 would reconcile low C,N,Oabundances with helioseismology.Solution: stellar values!?The problem: find a truly solar-like star. None star known has such a low Ne/Oratio as observed for the Sun. Why the Sun is so special?C.Liefke, JHMM. Schmitt, A&A L. (2006)
Serious disagreement between the predictions of the solarmodel and the observations obtained by helioseismology.M Asplund, N Grevesse, M Guedel, AJ Sauval, Nature 436 (2005) 525• some element differentiation process operates @ ~10000K chromosphere• Flares show an enhanced abundance of Ne. new clues to the mechanisms of coronal supply and heating .JLR Saba, KT Strong, Proc. Kofu Symp., NRO Report No 360(1994)305▼For the ~axion scenario: information on ρ ~ ω plasma
Page 1: Overlooked astrophysical signatures
Page 4: How can ~axions show-up in celestia
Page 7 and 8: On solving the Coronal Heating Prob
Page 9 and 10: ↛
Page 11 and 12: 2 nd component
Page 13 and 14: http://science.nasa.gov/headlines/y
Page 15 and 16: Quiet-Sun X-ray observationsRHESSIT
Page 17 and 18: FLARESThe Electron “Problem”G.
Page 19 and 20: Flares T flare ≈ T core199 flares
Page 21 and 22: 1 st component ~B 2 4 cases ~ consi
Page 23 and 24: The long-term evolution of AR 7978
Page 25 and 26: FLARES origin?L x↑3rdThe Electro
Page 27 and 28: Magnetic field computed from the Ze
Page 29: Solar metalicity
Page 33 and 34: The Ne abundance has been inferred
Page 35 and 36: Solar ν’s & X-raysoscillations /
Page 37 and 38: X-raysYohkohSXT S60 o N60 oSXT equa
Page 41 and 42: Solar Corona proxy Fe green line19
Page 43 and 44: By general agreement: the energy of
Page 45 and 46: Gamma rays from the neutralino dark
Page 47: Are these astrophysical ~axion sign
Page 50: X-ray mysteries:• Class 0 protost

Overlooked astrophysical signatures of axion(-like) particles

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