Zirin, Harold (1987) Arch filaments associated with the formation of sunspots by umbral merging. Solar Physics, 114 (2). pp. 239-244. ISSN 0038-0938. doi:10.1007/bf00167343. https://resolver.caltech.edu/CaltechAUTHORS:20200602-082147568
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Abstract
The formation of a sunspot during the emergence of a new group is described. The spot forms from a cluster of small umbrae that do not converge. Rather, the individual umbrae enlarge and merge into a spot covering the same area. The formation of each umbra is accompanied by an intensification of the arch filament anchored in it. The formation of the sunspot produces no apparent change in the total field.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1987 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 24 September, 1986; in revised form 25 August, 1987. This research was supported by the NSF Atmospheric Sciences Section under ATM 8513577 and NASA under NGL 05 002 034. I am indebted to Randy Fear, Dean Chou and Bill Marquette for their assistance in obtaining the observations. | |||||||||
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| Subject Keywords: | Apparent Change; Total Field; Spot Form; Arch Filament; Small Umbra | |||||||||
| Issue or Number: | 2 | |||||||||
| DOI: | 10.1007/bf00167343 | |||||||||
| Record Number: | CaltechAUTHORS:20200602-082147568 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20200602-082147568 | |||||||||
| Official Citation: | Zirin, H. Arch filaments associated with the formation of sunspots by umbral merging. Sol Phys 114, 239–244 (1987). https://doi.org/10.1007/BF00167343 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 103632 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 02 Jun 2020 15:47 | |||||||||
| Last Modified: | 16 Nov 2021 18:23 |
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