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外文期刊>The Astrophysical journal
>CHANG-ES. IV. RADIO CONTINUUM EMISSION OF 35 EDGE-ON GALAXIES OBSERVED WITH THE KARL G. JANSKY VERY LARGE ARRAY IN D CONFIGURATION—DATA RELEASE 1
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CHANG-ES. IV. RADIO CONTINUUM EMISSION OF 35 EDGE-ON GALAXIES OBSERVED WITH THE KARL G. JANSKY VERY LARGE ARRAY IN D CONFIGURATION—DATA RELEASE 1
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机译：变化。 IV。用Karl G. JANSKY在D组态中非常大的阵列观察到的35个边缘星系的无线电连续发射-数据发布1
We present the first part of the observations made for the Continuum Halos in Nearby Galaxies, an EVLA Survey (CHANG-ES) project. The aim of the CHANG-ES project is to study and characterize the nature of radio halos, their prevalence as well as their magnetic fields, and the cosmic rays illuminating these fields. This paper reports observations with the compact D configuration of the Karl G. Jansky Very Large Array (VLA) for the sample of 35 nearby edge-on galaxies of CHANG-ES. With the new wide bandwidth capabilities of the VLA, an unprecedented sensitivity was achieved for all polarization products. The beam resolution is an average of 96 and 36'' with noise levels reaching approximately 6 and 30 μJy beam?1 for C- and L-bands, respectively (robust weighting). We present intensity maps in these two frequency bands (C and L), with different weightings, as well as spectral index maps, polarization maps, and new measurements of star formation rates (SFRs). The data products described herein are available to the public in the CHANG-ES data release available at http://www.queensu.ca/changes. We also present evidence of a trend among galaxies with larger halos having higher SFR surface density, and we show, for the first time, a radio continuum image of the median galaxy, taking advantage of the collective signal-to-noise ratio of 30 of our galaxies. This image shows clearly that a "typical" spiral galaxy is surrounded by a halo of magnetic fields and cosmic rays.
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机译：我们介绍了对EVLA调查（CHANG-ES）项目附近星系连续晕的观测结果的第一部分。 CHANG-ES项目的目的是研究和表征无线电晕的性质，其流行程度以及磁场以及照亮这些磁场的宇宙射线。本文用卡尔·J·詹斯基（Karl G. Jansky）超大型阵列（VLA）的紧凑D构型报告了35个邻近的长恒星系星系样本的观测结果。借助VLA的新宽带功能，所有极化产品均实现了前所未有的灵敏度。光束分辨率的平均值为96英寸和36英寸，对于C波段和L波段的噪声水平分别达到约6和30μJy光束？1（稳健加权）。我们在这两个频带（C和L）中展示了具有不同权重的强度图，以及光谱指数图，极化图和新的恒星形成率（SFR）测量结果。本文所述的数据产品可在http://www.queensu.ca/changes上可用的CHANG-ES数据版本中向公众公开。我们还提出了具有更大光晕且具有较高SFR表面密度的星系之间趋势的证据，并且我们首次展示了利用30的集体信噪比，中位星系的无线电连续图像。我们的星系。该图像清楚地表明，“典型的”旋涡星系被磁场和宇宙射线的光环包围。
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