J/A+A/580/A43 Global HI content from a stacking experiment (Gereb+, 2015)
From star-forming galaxies to AGN: the global HI content from a stacking
experiment.
Gereb K., Morganti R., Oosterloo T.A., Hoppmann L., Staveley-Smith L.
<Astron. Astrophys. 580, A43 (2015)>
=2015A&A...580A..43G 2015A&A...580A..43G
ADC_Keywords: Galaxies, spectra ; Radio lines
Keywords: radio lines: galaxies
Abstract:
We study the atomic neutral hydrogen (HI) content of ∼1600 galaxies
up to z∼0.1 using stacking techniques. The observations were carried
out with the Westerbork Synthesis Radio Telescope (WSRT) in the area
of the SDSS South Galactic Cap (SSGC), where we selected a galaxy
sample from the SDSS spectroscopic catalog. Multi-wavelength
information is provided by SDSS, NVSS, GALEX, and WISE. We use the
collected information to study HI trends with color, star-forming,
and active galactic nuclei (AGN) properties. Using near-UV (NUV)-r
colors, galaxies are divided into blue cloud, green valley and red
sequence galaxies.
Description:
We present the atomic neutral hydrogen (HI) stacked spectra of
different galaxy populations selected by colour and/or
AGN/star-forming properties. The HI observations were carried out with
the Westerbork Synthesis Radio Telescope (WSRT) in the redshift range
0<z<0.12. In the observed volume, about 1600 galaxies have
available Sloan Digital Sky Survey (SDSS) spectroscopic measurement
and accompanying multi-wavelength data. Galaxy populations are defined
using the multi-wavelength information. The HI spectra of a selected
population are de-redshifted to the rest frame frequency of HI
(1420.4MHz) according to the SDSS redshift, and co-added in
redshift/luminosity bins.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 156 34 *List of fits spectra
fits/* . 34 Individual fits spectra
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Note on list.dat: spectra are from 1.40 to 1.44GHz.
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Nx [260] Number of Frequencies
5- 6 I2 Kibyte size [15] Size of the file
8- 47 A40 --- FileName Name of the fits file in subdirectory fits
49-156 A108 --- Title Title of the file
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Acknowledgements:
Katinka Gereb, kgereb(at)swin.edu.au
(End) K. Gereb [Swinburne Univ. of Technology], P. Vannier [CDS] 29-Jul-2015