USE OF ACOUSTIC-WAVE TRAVEL-TIME MEASUREMENTS TO PROBE THE NEAR-SURFACE LAYERS OF THE SUN

被引：36

作者：

JEFFERIES, SM

OSAKI, Y

SHIBAHASHI, H

DUVALL, TL

HARVEY, JW

POMERANTZ, MA

机构：

[1] NATL SOLAR OBSERV,NOAO,TUCSON,AZ 85719

[2] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771

[3] UNIV TOKYO,SCH SCI,DEPT ASTRON,BUNKYO KU,TOKYO 113,JAPAN

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 434卷 / 02期

关键词：

SUN; INTERIOR; OSCILLATIONS; WAVES;

D O I：

10.1086/174782

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The variation of solar p-mode travel times with cyclic frequency v is shown to provide information on both the radial variation of the acoustic potential and the depth of the effective source of the oscillations. Observed travel-time data for waves with frequency lower than the acoustic cutoff frequency for the solar atmosphere (almost-equal-to 5.5 mHz) are inverted to yield the local acoustic cutoff frequency v(c) as a function of depth in the outer convection zone and lower atmosphere of the Sun. The data for waves with v > 5.5 mHz are used to show that the source of the p-mode oscillations lies approximately 100 km beneath the base of the photosphere. This depth is deeper than that determined using a standard mixing-length calculation.

引用

页码：795 / 800

页数：6