The First Large Absorption Survey in H i (FLASH): I. Science goals and survey design
The First Large Absorption Survey in H i (FLASH): I. Science goals and survey design
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第一次大型吸收调查 (FLASH)：I. 科学目标和调查设计
DOI：
10.1017/pasa.2022.3
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发表时间：
2021-10
影响因子：
6.3
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
James R. Allison;E. M. Sadler;A. D. Amaral;T. An;S. J. Curran;J. Darling;A. C. Edge;S. L. Ellison;K. L. Emig;B. M. Gaensler;L. Garratt-Smithson;M. Glowacki;K. Grasha;B. S. Koribalski;C. del P. Lagos;P. Lah;E. K. Mahony;S. A. Mao;R. Morganti;V. A. Moss;M.
抽象。我们描述的科学目标和调查设计的第一次大吸收调查H i（FLASH），宽场调查中性原子氢（H i）在中间宇宙学红移的21厘米线吸收。FLASH将与澳大利亚平方公里阵列探路者（ASKAP）射电望远镜一起进行，计划覆盖澳大利亚南部的天空。Δ约为+40，deg $.频率在711.5和999.5 MHz之间。在红移之间。$ z = 0.4。和.$一块钱。（回看时间为4 - 8 Gyr），宇宙的H i含量一直探索得很差，因为难以对微弱的21厘米线发射进行无线电测量，以及在紫外波长下对阻尼莱曼-进行星载搜索。阿尔法$。类星体光谱中的吸收。ASKAP的宽视场和大光谱带宽，与无线电安静站点相结合，将能够搜索超过80%天空的明亮连续源的无线电光谱中的吸收线。这项调查预计将检测到至少几百个干预21厘米的吸收，并将产生一个H i吸收选择目录的星系丰富的冷，恒星形成的气体，其中一些可能是隐藏的光学调查。同样，在射电源的宿主星系中，预计至少会探测到几百个与之相关的21厘米吸收体。0.4 .为射电强活动星系核的气体吸积和喷流驱动反馈模型提供了有价值的运动学信息。FLASH还将检测扩散分子气体中的OH 18 cm吸收体、超脉泽OH发射、无线电复合线和堆叠H i发射。
Abstract. We describe the scientific goals and survey design of the First Large Absorption Survey in H i (FLASH), a wide field survey for 21-cm line absorption in neutral atomic hydrogen (H i) at intermediate cosmological redshifts. FLASH will be carried out with the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope and is planned to cover the sky south of .$delta approx +40,deg$. at frequencies between 711.5 and 999.5 MHz. At redshifts between .$z = 0.4$. and .$1.0$. (look-back times of 4 – 8 Gyr), the H i content of the Universe has been poorly explored due to the difficulty of carrying out radio surveys for faint 21-cm line emission and, at ultra-violet wavelengths, space-borne searches for Damped Lyman-.$alpha$. absorption in quasar spectra. The ASKAP wide field of view and large spectral bandwidth, in combination with a radio-quiet site, will enable a search for absorption lines in the radio spectra of bright continuum sources over 80% of the sky. This survey is expected to detect at least several hundred intervening 21-cm absorbers and will produce an H i-absorption-selected catalogue of galaxies rich in cool, star-forming gas, some of which may be concealed from optical surveys. Likewise, at least several hundred associated 21-cm absorbers are expected to be detected within the host galaxies of radio sources at .$0.4 . , providing valuable kinematical information for models of gas accretion and jet-driven feedback in radio-loud active galactic nuclei. FLASH will also detect OH 18-cm absorbers in diffuse molecular gas, megamaser OH emission, radio recombination lines, and stacked H i emission.
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DOI：
10.1093/mnras/stx408
发表时间：
2017-02
期刊：
arXiv: Astrophysics of Galaxies
影响因子：
--
作者：
S. Curran;M. Whiting;J. Allison;A. M. Sadler;R. Athreya
通讯作者：
S. Curran;M. Whiting;J. Allison;A. M. Sadler;R. Athreya
DOI：
10.1111/j.1365-2966.2009.14661.x
发表时间：
2009-03
影响因子：
4.8
作者：
N. Kanekar;J. Prochaska;S. Ellison;J. N. C. N. R. A. Observatory-J.-N.-C.-N.-R.-A.-Observatory-102497302;Usa UC-Santa Cruz;Usa University of Victoria;Canada Max-Planck Institute for Astrophysics;India.
通讯作者：
N. Kanekar;J. Prochaska;S. Ellison;J. N. C. N. R. A. Observatory-J.-N.-C.-N.-R.-A.-Observatory-102497302;Usa UC-Santa Cruz;Usa University of Victoria;Canada Max-Planck Institute for Astrophysics;India.
DOI：
10.1086/175726
发表时间：
1995-06
期刊：
The Astrophysical Journal
影响因子：
--
作者：
A. Oren;A. Wolfe
通讯作者：
A. Oren;A. Wolfe
DOI：
10.12785/jhs/20160115
发表时间：
2016
期刊：
journal of new results in science
影响因子：
--
作者：
V. Tiberia;C. Laughlin
通讯作者：
V. Tiberia;C. Laughlin
影响因子：
4.8
作者：
S. Curran;R. Hunstead;Helen M. Johnston;Matthew Whiting;E. Sadler;E. Sadler;J. R. Allison;R. Athreya
通讯作者：
S. Curran;R. Hunstead;Helen M. Johnston;Matthew Whiting;E. Sadler;E. Sadler;J. R. Allison;R. Athreya