CaltechAUTHORS
  A Caltech Library Service

Arch filaments associated with the formation of sunspots by umbral merging

Zirin, Harold (1987) Arch filaments associated with the formation of sunspots by umbral merging. Solar Physics, 114 (2). pp. 239-244. ISSN 0038-0938. https://resolver.caltech.edu/CaltechAUTHORS:20200602-082147568

[img] PDF (ADS) - Published Version
See Usage Policy.

400kB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20200602-082147568

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
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/bf00167343DOIArticle
https://ui.adsabs.harvard.edu/abs/1987SoPh..114..239Z/abstractADSArticle
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.
Funders:
Funding AgencyGrant Number
NSFATM-8513577
NASANGL 05 002 034
Subject Keywords:Apparent Change; Total Field; Spot Form; Arch Filament; Small Umbra
Issue or Number:2
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:02 Jun 2020 15:47

Repository Staff Only: item control page