Radio continuum emission in the northern Galactic plane: Sources and spectral indices from the THOR survey (Corrigendum)
Radio continuum emission in the northern Galactic plane: Sources and spectral indices from the THOR survey (Corrigendum)
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银河系北部平面的射电连续谱发射：来自 THOR 调查的来源和光谱指数（勘误表）
DOI：
10.1051/0004-6361/201833642
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发表时间：
2018
影响因子：
6.5
通讯作者：
S. Longmore
中科院分区：
文献类型：
--
作者：
Yuting Wang;S. Bihr;M. Rugel;H. Beuther;K. Johnston;J. Ott;J. Soler;A. Brunthaler;L. Anderson;J. Urquhart;R. Klessen;H. Linz;N. McClure;S. Glover;K. Menten;F. Bigiel;M. Hoare;S. Longmore
背景 对银河平面的射电连续统巡天可以发现并描述 HII 区域、超新星遗迹 (SNR)、行星状星云 (PNe) 和河外源。存在许多在不同波长下进行高角分辨率（≤25英寸）的勘测来研究星际介质（ISM），但在21厘米左右的长射电波长下还没有类似的高分辨率和高灵敏度勘测。
目标。我们的目标是以 < 25 英寸分辨率研究北银河平面的 21 厘米射电连续谱发射。
方法 我们使用覆盖六个连续光谱窗口 (SPW) 的 C 型配置的 Karl G. Jansky 甚大阵列 (VLA) 观测了银河系第一象限中的大部分银道面（l = 14.0−67.4° 且 |b| ≤ 1.25°）。这些数据提供了我们银河系紧凑型和扩展型无线电发射以及数千个河外背景源的详细视图。
结果我们使用BLOBCAT软件提取了10 916个源。在去除合成光束旁瓣引起的杂散源检测后，我们将 10 387 个源分类为可靠检测。我们将图像平滑至 25 英寸的通用分辨率，并提取每个 SPW 中每个源的峰值通量密度以确定光谱指数 α（假设 I(ν) ∝ να）。通过与 HII 区域、SNR、PNe 和脉冲星的目录进行交叉匹配，我们找到了 840 个 HII 区域、52 个 SNR、164 个 PNe 和 38 个脉冲星的无线电对应物。我们发现了 79 个与 X 射线源相关的连续谱源。我们确定了 699 个超陡光谱源 (α < -1.3)，它们可能是高红移星系。我们提取的大约 9000 个源没有具体分类，但根据它们的空间和光谱分布，其中很大一部分可能是河外背景源。超过 7750 个来源在 SIMBAD 数据库中没有对应内容，超过 3760 个来源在 NED 数据库中没有对应内容。
结论 研究长波长厘米连续发射和相关光谱指数使我们能够表征北内银河系区域大部分银河系和河外射电源。该数据库对于未来研究各种天体物理物体将非常有用。
Context Radio continuum surveys of the Galactic plane can find and characterize H II regions, supernova remnants (SNRs), planetary nebulae (PNe), and extragalactic sources. A number of surveys at high angular resolution (≤25″) at different wavelengths exist to study the interstellar medium (ISM), but no comparable high-resolution and high-sensitivity survey exists at long radio wavelengths around 21 cm.
Aims. Our goal is to investigate the 21 cm radio continuum emission in the northern Galactic plane at < 25″ resolution.
Methods We observed a large percentage of the Galactic plane in the first quadrant of the Milky Way (l = 14.0−67.4° and |b| ≤ 1.25°) with the Karl G. Jansky Very Large Array (VLA) in the C-configuration covering six continuum spectral windows (SPW). These data provide a detailed view on the compact as well as extended radio emission of our Galaxy and thousands of extragalactic background sources.
Results We used the BLOBCAT software and extracted 10 916 sources. After removing spurious source detections caused by the side lobes of the synthesized beam, we classified 10 387 sources as reliable detections. We smoothed the images to a common resolution of 25″ and extracted the peak flux density of each source in each SPW to determine the spectral indices α (assuming I(ν) ∝ να). By cross-matching with catalogs of H II regions, SNRs, PNe, and pulsars, we found radio counterparts for 840 H II regions, 52 SNRs, 164 PNe, and 38 pulsars. We found 79 continuum sources that are associated with X-ray sources. We identified 699 ultra-steep spectral sources (α < −1.3) that could be high-redshift galaxies. About 9000 of the sources we extracted are not classified specifically, but based on their spatial and spectral distribution, a large percentage of these are likely to be extragalactic background sources. More than 7750 sources do not have counterparts in the SIMBAD database and more than 3760 sources do not have counterparts in the NED database.
Conclusions Studying the long wavelengths centimeter continuum emission and the associated spectral indices allows us to characaterize a large percentage of Galactic and extragalactic radio sources in the area of the northern inner Milky Way. This database will be extremely useful for future studies of a diverse set of astrophysical objects.
影响因子：
6.5
作者：
S. Bihr;H. Beuther;J. Ott;K. Johnston;A. Brunthaler;L. Anderson;F. Bigiel;P. Carlhoff;E. Churchwell;S. Glover;P. Goldsmith;F. Heitsch;T. Henning;M. Heyer;T. Hill;A. Hughes;R. Klessen;R. Klessen;R. Klessen;H. Linz;S. Longmore;N. McClure-Griffiths;K. Menten;F. Motte;Q. Nguyen-Luong;R. Plume;S. Ragan;N. Roy;N. Roy;P. Schilke;Nathan Schneider;Rowan J. Smith;J. Stil;J. Urquhart;A. Walsh;F. Walter
通讯作者：
S. Bihr;H. Beuther;J. Ott;K. Johnston;A. Brunthaler;L. Anderson;F. Bigiel;P. Carlhoff;E. Churchwell;S. Glover;P. Goldsmith;F. Heitsch;T. Henning;M. Heyer;T. Hill;A. Hughes;R. Klessen;R. Klessen;R. Klessen;H. Linz;S. Longmore;N. McClure-Griffiths;K. Menten;F. Motte;Q. Nguyen-Luong;R. Plume;S. Ragan;N. Roy;N. Roy;P. Schilke;Nathan Schneider;Rowan J. Smith;J. Stil;J. Urquhart;A. Walsh;F. Walter