SCATTERING MATRIX FOR THE INTERACTION BETWEEN SOLAR ACOUSTIC WAVES AND SUNSPOTS. I. MEASUREMENTS

	SCATTERING MATRIX FOR THE INTERACTION BETWEEN SOLAR ACOUSTIC WAVES AND SUNSPOTS. I. MEASUREMENTS
	Yang, Ming-Hsu 1; Chou, Dean-Yi 1; Zhao, Hui2
刊名	ASTROPHYSICAL JOURNAL
	2017-01-20
卷号	835 期号:1
关键词	Sun: activity Sun: helioseismology Sun: interior Sun: magnetic fields Sun: oscillations sunspots
英文摘要	Assessing the interaction between solar acoustic waves and sunspots is a scattering problem. The scattering matrix elements are the most commonly used measured quantities to describe scattering problems. We use the wavefunctions of scattered waves of NOAAs 11084 and 11092 measured in the previous study to compute the scattering matrix elements, with plane waves as the basis. The measured scattered wavefunction is from the incident wave of radial order n to the wave of another radial order n', for n = 0-5. For a time-independent sunspot, there is no mode mixing between different frequencies. An incident mode is scattered into various modes with different wavenumbers but the same frequency. Working in the frequency domain, we have the individual incident plane-wave mode, which is scattered into various plane-wave modes with the same frequency. This allows us to compute the scattering matrix element between two plane-wave modes for each frequency. Each scattering matrix element is a complex number, representing the transition from the incident mode to another mode. The amplitudes of diagonal elements are larger than those of the off-diagonal elements. The amplitude and phase of the off-diagonal elements are detectable only for n-1 <= n' <= n + 1and -3 Delta k <= delta k(x) <= 3 Delta k, where delta k(x) is the change in the transverse component of the wavenumber and Delta k = 0.035 rad Mm(-1).
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	RING-DIAGRAM ANALYSIS ; P-MODE WAVES ; ACTIVE REGIONS ; PHENOMENOLOGICAL MODEL ; SUBSURFACE STRUCTURES ; EMISSIVITY REDUCTION ; LOCAL SUPPRESSION ; MAGNETIC-FIELDS ; PHASE-SHIFTS ; TRAVEL-TIME
收录类别	SCI
语种	英语
WOS记录号	WOS:000393455400102
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8274]
专题	国家天文台_太阳物理研究部
作者单位	1.Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan 2.Chinese Acad Sci, Natl Astron Observ, Beijing 200012, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ming-Hsu,Chou, Dean-Yi,Zhao, Hui. SCATTERING MATRIX FOR THE INTERACTION BETWEEN SOLAR ACOUSTIC WAVES AND SUNSPOTS. I. MEASUREMENTS[J]. ASTROPHYSICAL JOURNAL,2017,835(1).
APA	Yang, Ming-Hsu,Chou, Dean-Yi,&Zhao, Hui.(2017).SCATTERING MATRIX FOR THE INTERACTION BETWEEN SOLAR ACOUSTIC WAVES AND SUNSPOTS. I. MEASUREMENTS.ASTROPHYSICAL JOURNAL,835(1).
MLA	Yang, Ming-Hsu,et al."SCATTERING MATRIX FOR THE INTERACTION BETWEEN SOLAR ACOUSTIC WAVES AND SUNSPOTS. I. MEASUREMENTS".ASTROPHYSICAL JOURNAL 835.1(2017).