Showing papers by "Stephen E. Schneider published in 2016"

NIBLES: An H I census of stellar mass selected SDSS galaxies. I. The Nançay H I survey

Abstract: To investigate galaxy properties as a function of their total stellar mass, we obtained 21cm HI line observations at the 100-m class Nan\c{c}ay Radio Telescope of 2839 galaxies from the Sloan Digital Sky Survey (SDSS) in the Local Volume (900

NIBLES - an HI census of stellar mass selected SDSS galaxies: I. The Nan\c{c}ay HI survey

Abstract: To investigate galaxy properties as a function of their total stellar mass, we obtained 21cm HI line observations at the 100-m class Nancay Radio Telescope of 2839 galaxies from the Sloan Digital Sky Survey (SDSS) in the Local Volume (900

NIBLES – an HI census of stellar mass selected SDSS galaxies - II. Arecibo follow-up HI observations

Abstract: We obtained Arecibo Hi line follow-up observations of 154 of the 2600 galaxies in the Nancay Interstellar Baryons Legacy Extragalactic Survey (NIBLES) sample. These observations are on average four times more sensitive than the original observations at the Nancay 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 Nancay. Of the Nancay non-detections, 85% were either clearly or marginally detected at Arecibo, while 89% of the Nancay 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 Nancay non-detections and marginal detections could be detected at the sensitivity of our Arecibo observations. Follow-up observations of our low luminosity ( L r 8.5 L ⊙ ) blue sources indicate that they have, on average, more concentrated stellar mass distributions than the Nancay 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 HI / M ⋆ ) 0.5 dex and 1 dex lower, on average, than the NIBLES and ALFALFA surveys respectively.

NIBLES - an HI census of stellar mass selected SDSS galaxies: II. Arecibo follow-up HI observations

Abstract: We obtained Arecibo HI line follow-up observations of 154 of the 2600 galaxies in the Nan\c{c}ay Interstellar Baryons Legacy Extragalactic Survey (NIBLES) sample. These observations are on average four times more sensitive than the original observations at the Nan\c{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 Nan\c{c}ay. Of the Nan\c{c}ay non-detections, 85% were either clearly or marginally detected at Arecibo, while 89% of the Nan\c{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 Nan\c{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 Nan\c{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($M_{\rm HI}$/$M_{\star}$) 0.5 dex and 1 dex lower, on average, than the NIBLES and ALFALFA surveys respectively.