类型 杂志文章
XIMENA费尔南德斯,J。 H。面包车gorkom,凯利米。赫斯天。学家皮萨诺,凯瑟琳kreckel,伊曼纽尔momjian,阿提拉爆裂,汤姆oosterloo,劳拉chomiuk,米。一个。 W上。 verheijen,帕特里夏一个。亨宁,大卫schiminovich,马修。 bershady,埃里克米。 wilcots,缺口
出版物 在天体物理学杂志通讯
网页 L29
期刊缩写 在天体物理学杂志通讯
日期 2013年6月1日
DOI 10.1088 / 2041-8205 / 770/2 / L29
ISSN 0004-637x
网址 //
抽象 High-resolution 21 cm H I deep fields provide spatially and kinematically resolved images of neutral hydrogen at different redshifts, which are key to understanding galaxy evolution across cosmic time and testing predictions of cosmological simulations. Here we present results from a pilot for an H I deep field done with the Karl G. Jansky Very Large Array (VLA). We take advantage of the newly expanded capabilities of the telescope to probe the redshift interval 0 < z < 0.193 in one observation. We observe the COSMOS field for 50 hr, which contains 413 galaxies with optical spectroscopic redshifts in the imaged field of 34' × 34' and the observed redshift interval. We have detected neutral hydrogen gas in 33 galaxies in different environments spanning the probed redshift range, including three without a previously known spectroscopic redshift. The detections have a range of H I and stellar masses, indicating the diversity of galaxies we are probing. We discuss the observations, data reduction, results, and highlight interesting detections. We find that the VLA's B-array is the ideal configuration for H I deep fields since its long spacings mitigate radio frequency interference. This pilot shows that the VLA is ready to carry out such a survey, and serves as a test for future H I deep fields planned with other Square Kilometer Array pathfinders.
标签 星系:演化,广播线:星系