Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Thomas Hartlep"'
Autor:
J. R. Fuentes, Bradley W. Hindman, Junwei Zhao, Catherine C. Blume, Maria E. Camisassa, Nicholas A. Featherstone, Thomas Hartlep, Lydia Korre, Loren I. Matilsky
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 78 (2024)
Meridional circulation regulates the Sun’s interior dynamics and magnetism. While it is well accepted that meridional flows are poleward at the Sun’s surface, helioseismic observations have yet to provide a definitive answer for the depth at whic
Externí odkaz:
https://doaj.org/article/3ee0915fecb142819eb03faa7a12f9a0
Autor:
Thomas Hartlep, Junwei Zhao
Helioseismic waves observable at the solar surface can be used to probe the properties of the Sun's interior. By measuring helioseismic travel times between different location on the surface, flows and other interior properties can be inferred using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed8069b860c5a34e689e3fa7206a6036
http://arxiv.org/abs/2102.06411
http://arxiv.org/abs/2102.06411
Autor:
Thomas Hartlep, Jeffrey N. Cuzzi
We use a newly developed cascade model of turbulent concentration of particles in protoplanetary nebulae to calculate several properties of interest to the formation of primitive planetesimals and to the meteorite record. The model follows, and corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::032f85f7c7cbc99b21df0fca6b8bfe81
Autor:
Thomas Hartlep, Friedrich H. Busse
Publikováno v:
Geophysical & Astrophysical Fluid Dynamics. 112:20-35
Convection in a homogeneously cooled layer heated by a fixed temperature at the lower boundary is investigated numerically for various Rayleigh numbers Ra and Prandtl numbers Pr. The upper boundary...
Publikováno v:
Solar Physics. 291:1323-1340
The base of the convection zone and the tachocline play a major role in the study of the dynamics of the Sun, especially in the solar dynamo. Here, we present a phase-sensitive helioseismic holography method to infer changes in the sound-speed profil
Turbulent flows preferentially concentrate inertial particles depending on their stopping time or Stokes number, which can lead to significant spatial variations in the particle concentration. Cascade models are one way to describe this process in st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fbdf0c71928b9e511cfbbe361e52a02
http://arxiv.org/abs/1703.05871
http://arxiv.org/abs/1703.05871
Publikováno v:
NASA Astrophysics Data System
Measuring the Sun's internal meridional flow is one of the key issues of helioseismology. Using the Fourier-Legendre analysis is a technique for addressing this problem. We validate this technique with the help of artificial helioseismic data. The an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af311871af5698dc5eae5d79a4dd1117
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 419:2325-2328
We present results on modelling magnetic flux tubes in an unstably stratified medium and the flows around them using 2D axisymmetric magnetohydrodynamic (MHD) simulations. The study is motivated by the formation of magnetic field concentrations at th
Publikováno v:
Solar Physics. 268:321-327
We show that under certain conditions, subsurface structures in the solar interior can alter the average acoustic power observed at the photosphere above them. By using numerical simulations of wave propagation, we show that this effect is large enou
Publikováno v:
The Astrophysical Journal. 702:1150-1156
The solar tachocline at the bottom of the convection zone is an important region for the dynamics of the Sun and the solar dynamo. In this region, the sound speed inferred by global helioseismology exhibits a bump of approximately 0.4% relative to th