The Canadian Galactic Plane Survey
The Canadian Galactic Plane Survey
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DOI：
10.1086/375301
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发表时间：
2003-06
期刊：
影响因子：
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通讯作者：
J. English;A. Taylor;J. Irwin;S. Dougherty;S. Basu;C. Beichman;Jo-Anne C. Brown;Y. Cao;C. Carignan;D. Crabtree;P. Dewdney;N. Duric;M. Fich;É. Gagnon;J. Galt;S. Germain;N. Ghazzali;S. Gibson;S. Godbout;A. Gray;D. Green;C. Heiles;M. Heyer;L. Higgs;S. Jean;D. Johnstone;G. Joncas;T. Landecker;W. Langer;D. Leahy;P. Martin;H. Matthews;W. Mccutcheon;G. Moriarity-Scheiven;S. Pineault;C. Purton;R. Roger;D. Routledge;N. St-Louis;K. Tapping;S. Terebey;F. Vaneldik;D. Watson;H. Wendker;T. Willis;X. Zhang
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文献类型：
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作者：
J. English;A. Taylor;J. Irwin;S. Dougherty;S. Basu;C. Beichman;Jo-Anne C. Brown;Y. Cao;C. Carignan;D. Crabtree;P. Dewdney;N. Duric;M. Fich;É. Gagnon;J. Galt;S. Germain;N. Ghazzali;S. Gibson;S. Godbout;A. Gray;D. Green;C. Heiles;M. Heyer;L. Higgs;S. Jean;D. Johnstone;G. Joncas;T. Landecker;W. Langer;D. Leahy;P. Martin;H. Matthews;W. Mccutcheon;G. Moriarity-Scheiven;S. Pineault;C. Purton;R. Roger;D. Routledge;N. St-Louis;K. Tapping;S. Terebey;F. Vaneldik;D. Watson;H. Wendker;T. Willis;X. Zhang
加拿大银河平面巡天计划（Canadian Galactic Plane Survey，CGPS）是一个结合了联合收割机无线电、毫米波和红外线对银河平面的巡天计划，目的是提供银河盘大部分区域星际介质所有主要成分的角分尺度图像。我们详细描述了CGPS低频分量的观测结果、在自治领射电天体物理天文台（DRAO）进行的射电勘测，并总结了组成CGPS的合并勘测数据库的属性。DRAO综合望远镜巡天在1995年4月至2000年6月期间使用了85%的望远镜时间拍摄了银河平面的73°部分。这些观测提供了在408和1420 MHz两个频率上的同时无线电连续谱图像，以及中性氢原子λ = 21 cm跃迁的谱线图像。在1420兆赫的无线电连续谱中，双极化接收器提供所有四个斯托克斯参数的图像。测量范围为74.°2 < l < 147.°3，在1420 MHz时纬度范围为-3. ° 6 < B < +5. ° 6，在408 MHz时纬度范围为-6. ° 7 < B < +8. ° 7。通过对单天线观测数据的积分，观测图像提供了所有尺度的发射结构的完整信息，其分辨率极限在1420 MHz和408 MHz时分别为1′ × 1′ csc δ和3. 4 ′ × 3. 4 ′ csc δ。连续图像的动态范围为数千，产生基本上噪声限制的图像，在1420 MHz和408 MHz下的均方根分别为1.03 mJy beam-1和1.03 mJy beam-1。在0.82 km s-1通道上，谱线数据是噪声限制的，均方根亮温ΔTB = 3 K。完整的CGPS数据集，包括DRAO测量和12 CO（1-0）和尘埃红外发射的类似分辨率数据，都成像到相同的银河坐标网格和地图投影上，正通过加拿大天文数据中心向公众提供。
The Canadian Galactic Plane Survey (CGPS) is a project to combine radio, millimeter, and infrared surveys of the Galactic plane to provide arcminute-scale images of all major components of the interstellar medium over a large portion of the Galactic disk. We describe in detail the observations for the low-frequency component of the CGPS, the radio surveys carried out at the Dominion Radio Astrophysical Observatory (DRAO), and summarize the properties of the merged database of surveys that comprises the CGPS. The DRAO Synthesis Telescope surveys have imaged a 73° section of the Galactic plane, using ∼85% of the telescope time between 1995 April and 2000 June. The observations provide simultaneous radio continuum images at two frequencies, 408 and 1420 MHz, and spectral-line images of the λ = 21 cm transition of neutral atomic hydrogen. In the radio continuum at 1420 MHz, dual-polarization receivers provide images in all four Stokes parameters. The surveys cover the region 74.°2 < l < 147.°3, with latitude extent -3.°6 < b < +5.°6 at 1420 MHz and -6.°7 < b < +8.°7 at 408 MHz. By integration of data from single-antenna observations, the survey images provide complete information on all scales of emission structures down to the resolution limit, which is just below 1′ × 1′ csc δ at 1420 MHz and 3.′4 × 3.′4 csc δ at 408 MHz. The continuum images have a dynamic range of several thousand, yielding essentially noise-limited images with an rms of ∼0.3 mJy beam-1 at 1420 MHz and ∼3 mJy beam-1 at 408 MHz. The spectral-line data are noise limited with rms brightness temperature ΔTB ∼ 3 K in a 0.82 km s-1 channel. The complete CGPS data set, including the DRAO surveys and data at similar resolution in 12CO (1–0) and in infrared emission from dust, all imaged to an identical Galactic coordinate grid and map projection, are being made publicly available through the Canadian Astronomy Data Centre.