The differential emission measure distribution in the multiloop corona

被引：27

作者：

Aschwanden, MJ ^{[1
]}

机构：

[1] Lockheed Martin Adv Technol Ctr, Solar & Astrophys Lab, Palo Alto, CA 94304 USA

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 580卷 / 01期

基金：

美国国家航空航天局;

关键词：

Sun : corona; Sun : UV radiation;

D O I：

10.1086/345469

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This is a rebuttal of a recent Letter on the inadequacy of temperature measurements in the solar corona through narrowband filter and line ratios by Martens et al. We simulate the differential emission measure (DEM) distribution of a multiloop corona and find that the temperature profile of individual loops can be retrieved with narrowband filter ratios. The apparently flat DEM distributions constructed from Coronal Diagnostics Spectrometer line fluxes by Schmelz et al. are an artifact of a smoothing function (in temperature), while the unsmoothed DEM distribution reveals multiple peaks of near-isothermal loops.

引用

页码：L79 / L83

页数：5

共 19 条

[1] Evidence for nonuniform heating of coronal loops inferred from multithread modeling of TRACE data [J].

Aschwanden, MJ ;

Nightingale, RW ;

Alexander, D .

ASTROPHYSICAL JOURNAL, 2000, 541 (02) :1059-1077

[2] Three-dimensional stereoscopic analysis of solar active region loops.: I.: SOHO EIT observations at temperatures of (1.0-1.5) x 106 K [J].

Aschwanden, MJ ;

Newmark, JS ;

Delaboudinière, JP ;

Neupert, WM ;

Klimchuk, JA ;

Gary, GA ;

Portier-Fozzani, F ;

Zucker, A .

ASTROPHYSICAL JOURNAL, 1999, 515 (02) :842-867

[3] The effect of hydrostatic weighting on the vertical temperature structure of the solar corona [J].

Aschwanden, MJ ;

Nitta, N .

ASTROPHYSICAL JOURNAL, 2000, 535 (01) :L59-L62

[4] Three-dimensional stereoscopic analysis of solar active region loops.: II.: SOHO/EIT observations at temperatures of 1.5-2.5 MK [J].

Aschwanden, MJ ;

Alexander, D ;

Hurlburt, N ;

Newmark, JS ;

Neupert, WM ;

Klimchuk, JA ;

Gary, GA .

ASTROPHYSICAL JOURNAL, 2000, 531 (02) :1129-1149

[5] Analytical approximations to hydrostatic solutions and scaling laws of coronal loops [J].

Aschwanden, MJ ;

Schrijver, CJ .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2002, 142 (02) :269-283

[6] Modeling of coronal EUV loops observed with TRACE.: I.: Hydrostatic solutions with nonuniform heating [J].

Aschwanden, MJ ;

Schrijver, CJ ;

Alexander, D .

ASTROPHYSICAL JOURNAL, 2001, 550 (02) :1036-1050

[7] Measuring active and quiet-sun coronal plasma properties with extreme-ultraviolet spectra from SERTS [J].

Brosius, JW ;

Davila, JM ;

Thomas, RJ ;

MonsignoriFossi, BC .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1996, 106 (01) :143-164

[8] Temperatures of extreme-ultraviolet-emitting plasma structures observed by the Transition Region and Coronal Explorer [J].

Chae, J ;

Park, YD ;

Moon, YJ ;

Wang, HM ;

Yun, HS .

ASTROPHYSICAL JOURNAL, 2002, 567 (02) :L159-L163

[9] A new view of the solar corona from the transition region and coronal explorer (TRACE) [J].

Golub, L ;

Bookbinder, J ;

DeLuca, E ;

Karovska, M ;

Warren, H ;

Schrijver, CJ ;

Shine, R ;

Tarbell, T ;

Title, A ;

Wolfson, J ;

Handy, B ;

Kankelborg, C .

PHYSICS OF PLASMAS, 1999, 6 (05) :2205-2216

[10]

HARA H, 1992, PUBL ASTRON SOC JPN, V44, pL135

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