Tracing Hi Beyond the Local Universe
نویسندگان
چکیده
منابع مشابه
ALFALFA: HI Cosmology in the Local Universe
For the last 25 years, the 21 cm line has been used productively to investigate the large–scale structure of the Universe, its peculiar velocity field and the measurement of cosmic parameters. In February 2005 a blind HI survey that will cover 7074 square degrees of the high latitude sky was started at Arecibo, using the 7-beam feed L-band feed array (ALFA). Known as the Arecibo Legacy Fast ALF...
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The Arecibo Legacy Fast ALFA (ALFALFA) survey is an ongoing second generation blind extragalactic HI survey exploiting Arecibo’s superior sensitivity, angular resolution and digital technology to conduct a census of the local HI universe over a cosmologically significant volume. As of mid2007, ∼4500 good quality extragalactic HI line sources have been extracted in ∼15% of the final survey area....
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We present a simple method for tracing the spatial distribution and predicting the physical properties of the Warm-Hot Intergalactic Medium (WHIM), from the map of galaxy light in the local universe. Under the assumption that biasing is local and monotonic we map the ∼ 2 hMpc smoothed density field of galaxy light into the mass density field from which we infer the spatial distribution of the W...
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We present a global study of HI spectral line mapping for 16 Hickson Compact Groups (HCGs) combining new and unpublished VLA data, plus the analysis of the HI content of individual galaxies. Sixty percent of the groups show morphological and kinematical signs of perturbations (from multiple tidal features to concentration of the HI in a single enveloping cloud) and sixty ve of the resolved gala...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Australia
سال: 2017
ISSN: 1323-3580,1448-6083
DOI: 10.1017/pasa.2017.31