冕环是等温的还是多温的？是的，我会的
Are Coronal Loops Isothermal or Multithermal? Yes!
摘要：
令人惊讶的是，用TRACE和SOHO/CDS同时观测到的日冕环很少，对这些环进行的分析和发表的更少。SOHO联合观测计划146的设计部分是为了提供对活动区环路进行深入温度分析所需的同步观测，并确定这些环路是等温的还是多温的。本文分析的数据是2003年1月17日AR 10250的数据。我们使用TRACE滤波器比率，发射测量轨迹，和两种方法的差分发射测量分析，以检查三个不同的环路的温度结构。TRACE和CDS观察结果一致认为，环路1是等温的，Log T $=$ 5.85，沿视线以及沿CDS视场中可见的环路腿的长度。Loop 2比Loop 1更热。它沿视线是多热的，在6.2 $<$ Log T $<$ 6.4之间具有显著的发射，但是环顶点区域在CDS视场之外，因此不可能确定作为环高度的函数的温度分布。循环3似乎也是多热的，但一个混合循环，只是勉强解决与CDS可能会增加冷发射到循环3的强度和复杂化我们的结果。那么，日冕环是等温的还是多温的？答案似乎是肯定的！
英文摘要：
Surprisingly few solar coronal loops have been observed simultaneously with TRACE and SOHO/CDS, and even fewer analyses of these loops have been conducted and published. The SOHO Joint Observing Program 146 was designed in part to provide the simultaneous observations required for in-depth temperature analysis of active region loops and determine whether these loops are isothermal or multithermal. The data analyzed in this paper were taken on 2003 January 17 of AR 10250. We used TRACE filter ratios, emission measure loci, and two methods of differential emission measure analysis to examine the temperature structure of three different loops. TRACE and CDS observations agree that Loop 1 is isothermal with Log T $=$ 5.85, both along the line of sight as well as along the length of the loop leg that is visible in the CDS field of view. Loop 2 is hotter than Loop 1. It is multithermal along the line of sight, with significant emission between 6.2 $<$ Log T $<$ 6.4, but the loop apex region is out of the CDS field of view so it is not possible to determine the temperature distribution as a function of loop height. Loop 3 also appears to be multithermal, but a blended loop that is just barely resolved with CDS may be adding cool emission to the Loop 3 intensities and complicating our results. So, are coronal loops isothermal or multithermal? The answer appears to be yes!
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
