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Mapping HⅠ in the NGC 4636 Galaxy Group with FAST

Research in Astronomy and Astrophysics 2022年第9期22卷 202-222页

作者： Pei Zuo Dong Yang Jing Wang Lister Staveley-Smith Xuchen Lin Bi-Qing For Tobias Westmeier Jie Wang Kristine Spekkens Virginia Kilborn O.Ivy Wong Di Li Karen Lee-Waddell Barbara Catinella Luis C.Ho barbel koribalski Bumhyun Lee Ming Zhu Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China International Centre for Radio Astronomy Research(ICRAR) University of Western AustraliaCrawleyWA 6009Australia Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions(ASTRO 3D) Australia National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Department of Physics and Space Science Royal Military College of CanadaP.O.Box 17000Station ForcesKingstonOntarioK7K 7B4Canada Centre for Astrophysics and Supercomputing Swinburne University of TechnologyJohn StreetHawthorn3122Australia CSIRO Space and Astronomy Australia Telescope National FacilityP.O.Box 1130BentleyWA6102Australia Research Center for Intelligent Computing Platforms Zhejiang LaboratoryHangzhou 311100China CSIRO Space and Astronomy Australia Telecope National FacilityP.O.Box 76NSW 1710Australia School of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia Korea Astronomy and Space Science Institute Daejeon 34055Republic of Korea

This paper presents data from a 21 cm H I emission drift scan observation of a field partially covering the NGC 4636 galaxy group with the Five-hundred meter Aperture Radio Telescope(FAST). We construct a pipeline to reduce the data, and use So Fi A for source finding. When not contaminated by Radio Frequency Interference(RFI), the FAST observations are capable of detecting all of the galaxies previously detected by the Arecibo Legacy Fast ALFA(ALFALFA) survey in the same region. Comparing to ALFALFA for the detections in common, the FAST data show consistent integrated spectra when the H I disks are spatially unresolved, and capture more flux when the H I disks are resolved. The FAST data further reveal 10 new detections in the region mutually covered with ALFALFA, and 18 new detections beyond the footprint of ALFALFA. All of the new detections have the matching optical counterparts. For the member galaxies of the NGC 4636 group, the detection limit of FAST is deeper by 0.4 dex in H I mass than that of the ALFALFA data. After correcting for the incompleteness caused by RFI contamination, we show that the H I detection rate of galaxies rises steeply with radius out to the virial radius of the group, and flattens beyond that. We also examine four spatially resolved galaxy systems with potential tidal interaction features in detail. Considering that the data have been taken during the“shared-risk” period before a major source of local RFI was eliminated, the results highlight the power of FAST in detecting extragalactic H I.

关键词： Galaxy:evolution atomic data galaxies:groups:general

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德福考试全真试题

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2003年

作者：（德）Gabriele Kniffka （德）barbel Gutzat

本书包括：阅读理解训练、听力理解训练、书面表达训练和口语表达训练四个部分。

ISBN: (纸本)7560033261

本书包括：阅读理解训练、听力理解训练、书面表达训练和口语表达训练四个部分。

关键词：试题高等教育德语

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RBM20 mutations in left ventricular non-compaction cardiomyopathy

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Pediatric Investigation 2020年第1期4卷 61-63页

作者： Anna Gaertner barbel Klauke Andreas Brodehl Hendrik Milting Heart and Diabetes Center NRW University Hospital of the Ruhr-University BochumClinic of Thoracic and Cardiovascular SurgeryErich and Hanna Klessmann Institute for Cardiovascular Research and DevelopmentGeorgstrasse 11D-32545 Bad OeynhausenGermany

Cardiomyopathies are among the most prevalent causes of premature death in the Western world.A significant amount of cardiomyopathies has a genetic ***,mutations in more than 170 genes associated with different cardio... 详细信息

关键词： involvement ventricular cardiomyopathy

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