Zobrazeno 1 - 10
of 58
pro vyhledávání: '"D C, BRAUN"'
Autor:
D. C. Braun
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 160 (2024)
We estimate the contributions to the solar-cycle variation of solar meridional and zonal flows near the surface expected solely from local magnetic regions. Maps of flows near magnetic regions are obtained using helioseismic holography and averaged o
Externí odkaz:
https://doaj.org/article/5008114ecd4c40fab0ab78854a0a21e8
Publikováno v:
Astrophys J
We apply the helioseismic methodology of Legendre Function Decomposition to 88 months of Dopplergrams obtained by the Helioseismic and Magnetic Imager (HMI) as the basis of inferring the depth variation of the mean meridional flow, as averaged betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::660bc4ff1c86c0d89bcfe2553235729c
Autor:
Aaron C. Birch, D. C. Braun, Christian Baumgartner, Hannah Schunker, Laurent Gizon, Robert H. Cameron
The tilt of solar active regions described by Joy's law is essential for converting a toroidal field to a poloidal field in Babcock-Leighton dynamo models. In thin flux tube models the Coriolis force causes Joy's law, acting on east-west flows as the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd59c4744c39e689a9b6880a089ffe44
Publikováno v:
Astronomy & Astrophysics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=r3c4b2081b22::bd59c4744c39e689a9b6880a089ffe44
Publikováno v:
Astrophysics and Space Science Proceedings ISBN: 9783030553357
We apply the helioseismic methodology of Legendre Function Decomposition to 7.5 years of Dopplergrams obtained by the Helioseismic and Magnetic Imager (HMI) as the basis of inferring the depth variation of the meridional flow between 20∘ and 60∘
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e5ec17b626fd65e02dbc718b7ed2b38
https://doi.org/10.1007/978-3-030-55336-4_15
https://doi.org/10.1007/978-3-030-55336-4_15
Publikováno v:
The Astrophysical Journal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4ad7042fe3afa16254ce57caa73f669
https://doi.org/10.3847/1538-4357/ac4582
https://doi.org/10.3847/1538-4357/ac4582
Autor:
D. C. Braun
Publikováno v:
Astrophys J
We explore the general properties of near-surface flows around solar active regions. Helioseismic holography is applied to HMI Dopplergrams yielding nearly 5000 flow measurements of 336 unique active regions observed by the Solar Dynamics Observatory
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9a0b9514cd0a21e4ebc68720f71c0fd
Publikováno v:
Astronomy & Astrophysics
Astronomy and astrophysics
Astronomy and astrophysics
Context. The emergence of solar active regions is an important but poorly understood aspect of the solar dynamo.Aims. Knowledge of the flows associated with the rise of active-region-forming magnetic concentrations through the near-surface layers wil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f86e7d5e3b8e6d58f46f3391d404f45
https://doi.org/10.1051/0004-6361/201935591
https://doi.org/10.1051/0004-6361/201935591
Publikováno v:
Astronomy & Astrophysics. 625:A53
Our goal is to constrain models of active region formation by tracking the average motion of active region polarity pairs as they emerge onto the surface. We measured the motion of the two main opposite polarities in 153 emerging active regions (EARs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad2f0531f2e1cc8abf8c733d821183d7
https://doi.org/10.1051/0004-6361/201834627
https://doi.org/10.1051/0004-6361/201834627
Magnetohydrostatic models of the solar atmosphere are often based on idealized analytic solutions because the underlying equations are too difficult to solve in full generality. Numerical approaches, too, are often limited in scope and have tended to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5314cf5add82e35d46f13b18576bbe16
http://arxiv.org/abs/1609.00733
http://arxiv.org/abs/1609.00733