ar X iv : a st ro - p h / 99 06 25 2 v 1 1 5 Ju n 19 99 Large scale flows in the solar interior : Effect of asymmetry in peak profiles
نویسنده
چکیده
Ring diagram analysis can be used to study large scale velocity fields in the outer part of the solar convection zone. All previous works assume that the peak profiles in the solar oscillation power spectrum are symmetric. However, it has now been demonstrated that the peaks are not symmetric. In this work we study how the explicit use of asymmetric peak profiles in ring-diagram analysis influences the estimated velocity fields. We find that the use of asymmetric profiles leads to significant improvement in the fits, but the estimated velocity fields are not substantially different from those obtained using a symmetric profile to fit the peaks. The resulting velocity fields are compared with those obtained by other investigators. Subject headings: Sun: oscillations; Sun: rotation; Sun: interior
منابع مشابه
ar X iv : a st ro - p h / 99 06 25 1 v 1 1 5 Ju n 19 99 Inflow and outflows in NGC 2992 / 3
We present observational evidences for inflow and outflows in the interacting system Arp 245 (NGC 2992/3).
متن کاملar X iv : a st ro - p h / 97 06 19 2 v 1 1 8 Ju n 19 97 Metal Abundance in the Solar
It is shown that the metal abundance in the solar interior is constrained from the current solar neutrino experiment, even if one allows neutrino conversion in the sun due to neutrino oscillation. The result shows that the metal abundance in the interior should be within the range 0.4–1.4 times that in the surface, supporting the idea that the sun formed by a contraction of a gas cloud with an ...
متن کاملar X iv : a st ro - p h / 99 06 35 8 v 1 2 3 Ju n 19 99 Helical motions in the jet of blazar 1156 + 295
The blazar 1156+295 was observed by VLBA and EVN + MERLIN at 5 GHz in June 1996 and February 1997 respectively. The results show that the jet of the source has structural oscillations on the milliarcsecond scale and turns through a large angle to the direction of the arcsecond-scale extension. A helical jet model can explain most of the observed properties of the radio structure in 1156+295.
متن کاملar X iv : m at h / 99 06 16 4 v 1 [ m at h . D S ] 2 4 Ju n 19 99 LINEAR FLOWS ON κ - SOLENOIDS
Linear flows on inverse limits of tori are defined and it is shown that two linear flows on an inverse limit of tori are equivalent if and only if there is an automorphism of the inverse limit generating the equivalence.
متن کامل