On the Spatial Dependence of Low-Degree Solar p-Mode Frequency Shifts from Full-Disk and Resolved-Sun Observations

Bibcode
2004ApJ...610L..65J
DOI
10.1086/423174
Jiménez-Reyes, S. J.; García, R. A.; Chaplin, W. J.; Korzennik, S. G.
Referencia bibliográfica

The Astrophysical Journal, Volume 610, Issue 1, pp. L65-L68.

Fecha de publicación:
7
2004
Revista
The Astrophysical Journal
Número de autores
4
Número de autores del IAC
1
Número de citas
25
Número de citas referidas
20
Descripción
We have analyzed low angular degree (low-l) solar p-mode frequency shifts extracted from two types of observations, both made by instruments on board the ESA/NASA Solar and Heliospheric Observatory satellite during a period that covers the rising phase of activity, cycle 23 (1995-2002). The first are full-disk (Sun-as-a-star) averages made in Doppler velocity by the Global Oscillations at Low Frequency spectrophotometer; the second are Doppler velocity observations made with high spatial resolution by the Michelson Doppler Imager. We compare the eigenfrequency shifts from both sets of data and find that they are consistent at the level of precision of the observations. Furthermore, the sizes of the shifts uncovered for different mode components are found to scale in proportion to the corresponding spherical harmonic components of the observed line-of-sight surface magnetic field, with the sectoral mode components showing (as expected) the largest shifts.
Tipo
Con árbitro
Heliosismología

Te puede interesar

  • Con árbitro
    Euclid preparation. XXXVII. Galaxy colour selections with Euclid and ground photometry for cluster weak-lensing analyses

    Aims: We derived galaxy colour selections from Euclid and ground-based photometry, aiming to accurately define background galaxy samples in cluster weak-lensing analyses. These selections have been implemented in the Euclid data analysis pipelines for galaxy clusters. Methods: Given any set of photometric bands, we developed a method for the

    Euclid Collaboration et al.

    Fecha de publicación:

    4
    2024
    Bibcode
    2024A&A...684A.139E
    Número de citas
    2
  • Con árbitro
    The discovery space of ELT-ANDES. Stars and stellar populations

    The ArmazoNes high Dispersion Echelle Spectrograph (ANDES) is the optical and near-infrared high-resolution echelle spectrograph envisioned for the Extremely Large Telescope (ELT). We present a selection of science cases, supported by new calculations and simulations, where ANDES could enable major advances in the fields of stars and stellar

    Roederer, Ian U. et al.

    Fecha de publicación:

    4
    2024
    Bibcode
    2024ExA....57...17R
    Número de citas
    0
  • Con árbitro
    Euclid preparation. XXXVI. Modelling the weak lensing angular power spectrum

    This work considers which higher order modeling effects on the cosmic shear angular power spectra must be taken into account for Euclid. We identified the relevant terms and quantified their individual and cumulative impact on the cosmological parameter inferences from Euclid. We computed the values of these higher order effects using analytic

    Euclid Collaboration et al.

    Fecha de publicación:

    4
    2024
    Bibcode
    2024A&A...684A.138E
    Número de citas
    4