EXTENDING THE BIG POWER LAW IN THE SKY WITH TURBULENCE SPECTRA FROM WISCONSIN Hα MAPPER DATA

被引:210
作者
Chepurnov, A.
Lazarian, A.
机构
[1] Department of Astronomy, University of Wisconsin, MD
基金
美国国家科学基金会;
关键词
ISM: lines and bands; methods: data analysis; techniques: spectroscopic; turbulence; INTERSTELLAR-MEDIUM; MAGNETOHYDRODYNAMIC TURBULENCE; SOLAR-WIND; EMISSION; SCALE; ANISOTROPY;
D O I
10.1088/0004-637X/710/1/853
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We use the data of the Wisconsin Ha Mapper (WHAM) to test the hypothesis of whether the amplitudes and spectra of density fluctuations measured by WHAM can be matched to the data obtained for interstellar scintillations and scattering. To do this, first of all, we adjusted the mean level of signal in the adjacent patches of the data. Then assuming that the spectrum is Kolmogorov, we successfully matched the amplitudes of turbulence obtained from the WHAM data and the interstellar density fluctuations reported in the existing literature. As a result, we conclude that the existing data is consistent with the Kolmogorov cascade which spans from 10(6) to 10(17) m.
引用
收藏
页码:853 / 858
页数:6
相关论文
共 24 条
[1]   ELECTRON-DENSITY POWER SPECTRUM IN THE LOCAL INTERSTELLAR-MEDIUM [J].
ARMSTRONG, JW ;
RICKETT, BJ ;
SPANGLER, SR .
ASTROPHYSICAL JOURNAL, 1995, 443 (01) :209-221
[2]   Density scaling and anisotropy in supersonic magnetohydrodynamic turbulence [J].
Beresnyak, A ;
Lazarian, A ;
Cho, J .
ASTROPHYSICAL JOURNAL, 2005, 624 (02) :L93-L96
[3]   COMPARISON OF SPECTRAL SLOPES OF MAGNETOHYDRODYNAMIC AND HYDRODYNAMIC TURBULENCE AND MEASUREMENTS OF ALIGNMENT EFFECTS [J].
Beresnyak, A. ;
Lazarian, A. .
ASTROPHYSICAL JOURNAL, 2009, 702 (02) :1190-1198
[4]  
CHEPURNOV A, 2009, APJ UNPUB
[5]   Compressible magnetohydrodynamic turbulence: mode coupling, scaling relations, anisotropy, viscosity-damped regime and astrophysical implications [J].
Cho, JY ;
Lazarian, A .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 345 (01) :325-339
[6]  
Cordes J. M., 2002, astro-ph/0207156
[7]   THE GALACTIC DISTRIBUTION OF FREE-ELECTRONS [J].
CORDES, JM ;
WEISBERG, JM ;
FRAIL, DA ;
SPANGLER, SR ;
RYAN, M .
NATURE, 1991, 354 (6349) :121-124
[8]   Interstellar turbulence I: Observations and processes [J].
Elmegreen, BG ;
Scalo, J .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 2004, 42 :211-273
[9]   The Vertical Structure of Warm Ionised Gas in the Milky Way [J].
Gaensler, B. M. ;
Madsen, G. J. ;
Chatterjee, S. ;
Mao, S. A. .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, 2008, 25 (04) :184-200
[10]   TOWARD A THEORY OF INTERSTELLAR TURBULENCE .2. STRONG ALFVENIC TURBULENCE [J].
GOLDREICH, P ;
SRIDHAR, S .
ASTROPHYSICAL JOURNAL, 1995, 438 (02) :763-775