MEASUREMENTS OF THE ABSORPTION AND SCATTERING CROSS SECTIONS FOR THE INTERACTION OF SOLAR ACOUSTIC WAVES WITH SUNSPOTS
文献类型：期刊论文
| 作者 | Zhao, Hui1 ; Chou, Dean-Yi2
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016-05-01 |
| 卷号 | 822期号:1 |
| 关键词 | Sun: activity Sun: helioseismology Sun: interior Sun: magnetic fields Sun: oscillations sunspots |
| 英文摘要 | The solar acoustic waves are modified by the interaction with sunspots. The interaction can be treated as a scattering problem: an incident wave propagating toward a sunspot is scattered by the sunspot into different modes. The absorption cross section and scattering cross section are two important parameters in the scattering problem. In this study, we use the wavefunction of the scattered wave, measured with a deconvolution method, to compute the absorption cross section sigma(ab) and the scattering cross section sigma(sc) for the radial order n = 0-5 for two sunspots, NOAA 11084 and NOAA 11092. In the computation of the cross sections, the random noise and dissipation in the measured acoustic power are corrected. For both sigma(ab) and sigma(sc), the value of NOAA 11092 is greater than that of NOAA 11084, but their overall n dependence is similar: decreasing with n. The ratio of sigma(ab) of NOAA 11092 to that of NOAA 11084 approximately equals the ratio of sunspot radii for all n, while the ratio of sigma(sc). of the. two sunspots is greater than the ratio of sunspot radii and increases with n. This suggests that sigma(ab) is approximately proportional to the sunspot radius, while the dependence of sigma(sc) on radius is faster than the linear increase. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000377154100023 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5346]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 200012, Peoples R China 2.Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan |
| 推荐引用方式 GB/T 7714 | Zhao, Hui,Chou, Dean-Yi. MEASUREMENTS OF THE ABSORPTION AND SCATTERING CROSS SECTIONS FOR THE INTERACTION OF SOLAR ACOUSTIC WAVES WITH SUNSPOTS[J]. ASTROPHYSICAL JOURNAL,2016,822(1). |
| APA | Zhao, Hui,&Chou, Dean-Yi.(2016).MEASUREMENTS OF THE ABSORPTION AND SCATTERING CROSS SECTIONS FOR THE INTERACTION OF SOLAR ACOUSTIC WAVES WITH SUNSPOTS.ASTROPHYSICAL JOURNAL,822(1). |
| MLA | Zhao, Hui,et al."MEASUREMENTS OF THE ABSORPTION AND SCATTERING CROSS SECTIONS FOR THE INTERACTION OF SOLAR ACOUSTIC WAVES WITH SUNSPOTS".ASTROPHYSICAL JOURNAL 822.1(2016). |
入库方式： OAI收割
来源：国家天文台
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