EVIDENCE FOR A 250 2ND BRIGHTNESS OSCILLATION AT 1600-A IN THE SOLAR TEMPERATURE MINIMUM REGION

被引：3

作者：

COOK, JW

EWING, JA

机构：

[1] Applied Research Corporation, Landover, MD 20785

[2] E. O. Hulburt Ctr. for Space Res., Naval Research Laboratory, Washington

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 371卷 / 02期

关键词：

SUN; ACTIVITY; OSCILLATIONS; ULTRAVIOLET; GENERAL;

D O I：

10.1086/169945

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have studied a 330 s sequence of solar images at 1600 angstrom, where the solar flux arises predominantly from the temperature minimum continuum, obtained from a sounding rocket flight. The statistical distributions of the periods and amplitudes which result from fitting a sine wave to each individual 5 arcsec square box within a 350 x 350 arcsec quiet-Sun field were obtained. We find evidence for 250 s oscillations in the quiet-Sun brightness temperature in approximately 10" coherent patches, with an average amplitude of 50 K. The amplitude corresponds to an energy flux of 1.8 x 10(5) ergs cm-2 s-1 for undamped, adiabatic, propagating sound waves, which is small compared to the heating requirement in the temperature minimum region.

引用

页码：804 / +

页数：1

共 16 条

[1] CHROMOSPHERIC AND CORONAL HEATING [J].