WALLABY Pilot Survey: the Tully-Fisher relation in the NGC 4808, Vela and NGC 5044 fields
arxiv(2024)
摘要
The Tully-Fisher Relation (TFR) is a well-known empirical relationship
between the luminosity of a spiral galaxy and its circular velocity, allowing
us to estimate redshift independent distances. Here we use high signal-to-noise
HI 21-cm integrated spectra from the second pilot data release (PDR2, 180 deg2)
of the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY). In order
to prepare for the full WALLABY survey, we have investigated the TFR in phase 2
of the pilot survey with a further three fields. The data were obtained with
wide-field Phased Array Feeds on the Australian Square Kilometre Array
Pathfinder (ASKAP) and have an angular resolution of 30 arcsec and a velocity
resolution of 4 km/s. Galaxy luminosities have been measured from the
Wide-field Infrared Survey Explorer (WISE), and optical galaxy inclinations
from the Dark Energy Camera Legacy Survey. We present TFRs for wavelengths from
0.8-3.4μm. We examine sources of galaxy inclination data and investigate
magnitudes from the DECam Local Volume Exploration Survey (DELVE) and DENIS
catalogues and the 4HS target catalogue based on the VISTA Hemisphere Survey
(VHS). We consider the baryonic TFR. These are all of interest for TFR using
the full WALLABY survey of 200,000 galaxies. We demonstrate that WALLABY TFR
distances can take their place among state of the art studies of the local
velocity field.
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