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The velocities of intranetwork and network magnetic fields

Wang, H. and Tang, F. and Zirin, H. and Wang, J. (1996) The velocities of intranetwork and network magnetic fields. Solar Physics, 165 (2). pp. 223-235. ISSN 0038-0938. doi:10.1007/bf00149712.

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We analyzed two sequences of quiet-Sun magnetograms obtained on June 4, 1992 and July 28, 1994. Both were observed during excellent seeing conditions such that the weak intranetwork (IN) fields are observed clearly during the entire periods. Using the local correlation tracking technique, we derived the horizontal velocity fields of IN and network magnetic fields. They consist of two components: (1) radial divergence flows which move IN fields from the network interior to the boundaries, and (2) lateral flows which move along the network boundaries and converge toward stronger magnetic elements. Furthermore, we constructed divergence maps based on horizonal velocities, which are a good representation of the vertical velocities of supergranules. For the June 4, 1992 data, the enhanced network area in the field of view has twice the flux density, 10% higher supergranular velocity and 20% larger cell sizes than the quiet, unenhanced network area. Based on the number densities and flow velocities of IN fields derived in this paper and a previous paper (Wang et al., 1995), we estimate that the lower limit of total energy released from the recycling of IN fields is 1.2 × 10²⁸ erg s⁻¹, which is comparable to the energy required for coronal heating.

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Wang, H.0000-0002-5233-565X
Additional Information:© 1996 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 12 May 1995; Revised 21 September 1995. The operation of BBSO was supported by NSF grant ATM-9122023 and by NASA grant NAGW-1979. HW has been supported by NASA grant NAG5-2090 and NJIT SBR funding.
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New Jersey Institute of Technology (NJIT)UNSPECIFIED
Subject Keywords:Network Area; Horizontal Velocity; Lateral Flow; Radial Divergence; Tracking Technique
Issue or Number:2
Record Number:CaltechAUTHORS:20200515-141037507
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Official Citation:Wang, H., Tang, F., Zirin, H. et al. The velocities of intranetwork and network magnetic fields. Sol Phys 165, 223–235 (1996).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103244
Deposited By: Tony Diaz
Deposited On:15 May 2020 21:43
Last Modified:16 Nov 2021 18:19

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