Surprising sun: a new step towards a complete picture?

Important revisions of the solar model ingredients have appeared recently. We first show that the updated CNO composition suppresses the anomalous position of the Sun in the known galactic enrichment. The following law, He/H = 0.075 + 44.6 O/H in number fraction, is now compatible with all the indicators. We then suggest some directions of investigation to solve the discrepancies between the standard model and solar seismic observations. We finally update our predicted neutrino fluxes using a seismic model and all the recent progress. We get 5.31 +/- 0.6 x 10(6)/cm2/s for the total 8B neutrinos, 66.5 +/- 4.4 SNU and 2.76 +/- 0.4 SNU for the gallium and chlorine detectors, all in remarkable agreement with the detected values including neutrino oscillations for the last two. So, the acoustic modes and detected neutrinos see the same Sun, but the standard model fails to reproduce them.

[1]  J. Christensen-Dalsgaard,et al.  Solar Neutrino Emission Deduced from a Seismic Model , 2001 .

[2]  T. V. Bullard,et al.  Measurement of the total active 8B solar neutrino flux at the Sudbury Neutrino Observatory with enhanced neutral current sensitivity. , 2004, Physical review letters.

[3]  D. Vignaud,et al.  The solar interior , 1993 .

[4]  H. M. Antia,et al.  CONSTRAINING SOLAR ABUNDANCES USING HELIOSEISMOLOGY , 2004, astro-ph/0403485.

[5]  A. Kosovichev,et al.  SOLAR SEISMIC MODELS AND THE NEUTRINO PREDICTIONS , 2002, astro-ph/0203107.

[6]  K. Lodders Solar System Abundances and Condensation Temperatures of the Elements , 2003 .

[7]  D. Kiselman,et al.  Line formation in solar granulation IV. (O I), O I and OH lines and the photospheric O abundance , 2003, astro-ph/0312290.

[8]  Forrest J. Rogers,et al.  Updated Opal Opacities , 1996 .

[9]  F. Varadi,et al.  Identification of Solar Acoustic Modes of Low Angular Degree and Low Radial Order , 2000 .

[10]  F. Shu,et al.  Extinct Radioactivities and Protosolar Cosmic Rays: Self-Shielding and Light Elements , 2001 .

[11]  L. Deharveng,et al.  Oxygen and helium abundances in Galactic H ii regions — II. Abundance gradients , 2000 .

[12]  N. Grevesse,et al.  In: Origin and Evolution of the elements , 1993 .

[13]  N. Badnell,et al.  A comparison of Rosseland-mean opacities from OP and OPAL , 2004, astro-ph/0404437.

[14]  C. Chenais-popovics,et al.  L-band x-ray absorption of radiatively heated nickel. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[15]  R. Wimmer–Schweingruber Joint SOHO/ACE workshop "Solar and Galactic Composition" , 2001 .

[16]  M. McIntyre,et al.  Inevitability of a magnetic field in the Sun's radiative interior , 1998, Nature.

[17]  H. Costantini,et al.  Astrophysical S-factor of 14N( p, ?) 15O , 2003, nucl-ex/0312015.

[18]  What do we (not) know theoretically about solar neutrino fluxes? , 2004, Physical review letters.

[19]  M. Barlow,et al.  Heavy elements in Galactic and Magellanic Cloud H ii regions: recombination‐line versus forbidden‐line abundances , 2002, astro-ph/0209534.

[20]  L. Kitchatinov,et al.  The slender solar tachocline: a magnetic model , 1997 .

[21]  New measurement and analysis of the7Be(p,γ)8B cross section , 1997, nucl-ex/9712003.

[22]  F. Matteucci,et al.  Element abundances in blue compact galaxies , 1994 .

[23]  M. Lazrek,et al.  Low-Degree Low-Order Solar p Modes As Seen By GOLF On board SOHO , 2001 .

[24]  David R. Alexander,et al.  Low-Temperature Rosseland Opacities , 1975 .

[25]  Precise measurement of the 7Be(p,gamma)8B S-factor , 2003, nucl-ex/0308003.

[26]  N. Grevesse,et al.  Abundances of the elements: Meteoritic and solar , 1989 .

[27]  I. Lopes,et al.  Toward a unified classical model of the sun: On the sensitivity of neutrinos and helioseismology to the microscopic physics , 1993 .

[28]  P. Charbonneau,et al.  Angular Momentum Transport in Magnetized Stellar Radiative Zones. IV. Ferraro’s Theorem and the Solar Tachocline , 1999 .

[29]  J. Christensen-Dalsgaard,et al.  Effects of diffusion on solar models and their oscillation frequencies , 1993 .

[30]  G. Goldring,et al.  Solar fusion cross sections , 1998 .