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19 April 2024 |
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Article overview
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NIBLES - an HI census of stellar mass selected SDSS galaxies: II. Arecibo follow-up HI observations | | Z. Butcher
; S. Schneider
; W. van Driel
; M.D. Lehnert
; R. Minchin
; | | Date: |
20 Sep 2016 | | Abstract: | We obtained Arecibo HI line follow-up observations of 154 of the 2600
galaxies in the Nanc{c}ay Interstellar Baryons Legacy Extragalactic Survey
(NIBLES) sample. These observations are on average four times more sensitive
than the original observations at the Nanc{c}ay Radio Telescope. The main goal
of this survey is to characterize the underlying HI properties of the NIBLES
galaxies which were undetected or marginally detected at Nanc{c}ay. Of the
Nanc{c}ay non-detections, 85% were either clearly or marginally detected at
Arecibo, while 89% of the Nanc{c}ay marginal detections were clearly detected.
Based on the statistics of the detections relative to g-i color and r-band
luminosity (L$_r$) distribution among our Arecibo observations, we anticipate
~60% of our 867 Nanc{c}ay non-detections and marginal detections could be
detected at the sensitivity of our Arecibo observations. Follow-up observations
of our low luminosity (L$_r$ < 10$^{8.5}$ L$_{odot}$) blue sources indicate
that they have, on average, more concentrated stellar mass distributions than
the Nanc{c}ay detections in the same luminosity range, suggesting we may be
probing galaxies with intrinsically different properties. These follow-up
observations enable us to probe HI mass fractions, log($M_{
m
HI}$/$M_{star}$) 0.5 dex and 1 dex lower, on average, than the NIBLES and
ALFALFA surveys respectively. | | Source: | arXiv, 1609.6242 | | Services: | Forum | Review | PDF | Favorites | |
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