Temperature at the poles and at the equator of the sun

dc.contributor.author	Das, A. K
dc.contributor.author	Abhyankar, K. D
dc.date.accessioned	2009-06-11T15:06:48Z
dc.date.available	2009-06-11T15:06:48Z
dc.date.issued	1955
dc.identifier.citation	Vistas in Astronomy, Vol. 1, No.1, pp. 658 - 666	en
dc.identifier.uri	http://hdl.handle.net/2248/4529
dc.description	Restricted Access
dc.description.abstract	The equivalent widths of the g and K lines are measured at the pole and at the equator of the Sun during a period of minimum solar activity. The difference of temperature between pole and equator is evaluated by Woolley's method of the calcium ionization temperature. The pole is found to be hotter than the equator by 96° ± 18° or 86° ± 16°, depending upon the choice of the values of the continuous absorption coefficients. This result lends support to Bjerknes's thermohydrodynamical theory of sunspots. Using Bjerknes's theory, the depth of the sunspot umbral column is calculated from the observed difference of temperature between pole and equator and is found to be 125 km or 140 km.	en
dc.language.iso	en	en
dc.publisher	Elsevier	en
dc.relation.uri	http://dx.doi.org/10.1016/0083-6656(55)90080-5	en
dc.rights	© Pergamon Press	en
dc.subject	Large Scale Convection	en
dc.subject	Temperature Observations	en
dc.title	Temperature at the poles and at the equator of the sun	en
dc.type	Article	en