Meridional Flows from Ring Diagram Analysis

Bibcode
1999ApJ...510L.153G
DOI
10.1086/311811
González Hernández, J. I.; Patrón, J.; Bogart, R. S.; SOI Ring Diagram Team
Referencia bibliográfica

The Astrophysical Journal, Volume 510, Issue 2, pp. L153-L156.

Fecha de publicación:
1
1999
Revista
The Astrophysical Journal
Número de autores
4
Número de autores del IAC
2
Número de citas
51
Número de citas referidas
36
Descripción
In order to search for meridional circulation in the solar envelope, we have applied ring diagram analysis to a set of small regions over the surface. The helioseismic data consist of Solar Oscillation Investigation/Michelson Doppler Imager Dopplergrams taken over a time span of about 50 hr (~3000 images) on 1998 June 20-22. The regions studied cover 115 deg in latitude centered on the equator and 30 deg in longitude. We find poleward flows between r/ R_solar=0.97 and the surface. There is no evidence in this depth range for the return path of these meridional flows. The temporal stability of these flows will be discussed after the analysis of a synoptic map obtained using the same technique.
Tipo
Con árbitro

Te puede interesar

  • Con árbitro
    Beyond the Nyquist frequency: Asteroseismic catalog of undersampled Kepler late subgiants and early red giants
    Subgiants and early red giants are crucial for studying the first dredge-up, a key evolutionary phase in which the convective envelope deepens, mixing previously interior-processed material and bringing it to the surface. Yet, very few have been seismically characterized with Kepler because their oscillation frequencies are close to the 30 minute
    Liagre, B. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.144L
    Número de citas
    0
  • Con árbitro
    An ALMA Band 7 survey of SDSS/Herschel quasars in Stripe 82: I. The properties of the 870 micron counterparts
    Context. Over the past 15 years, studies of quasars in the far-infrared (FIR) have reported host luminosities ranging from 10 12 to 10 14 L ⊙. These luminosities, often derived from Herschel/SPIRE photometry, suggest star formation rates (SFRs) of up to several thousand M ⊙ yr ‑1, positioning them among the most luminous starburst galaxies in the
    Hatziminaoglou, E. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.183H
    Número de citas
    0
  • Con árbitro
    Transit timing variations in HIP 41378: CHEOPS and TESS confirm a non-transiting sixth planet in the system
    In multiple-planet systems, gravitational interactions of exoplanets could lead to transit timing variations (TTVs), whose amplitude becomes significantly enhanced when planets are in or near mean-motion resonances (MMRs), making them more easily detectable. In cases where both TTVs and radial velocity (RV) measurements are available, combined
    Leonardi, P. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.211L
    Número de citas
    0