Combined optical and radio image of polar ring galaxy candidate NGC 4632. Image Credit: J. English (U.Manitoba), with support of N. Deg (Queen’s U.) and the WALLABY team; CSIRO/ASKAP radio telescope, NAOJ/Subaru Telescope.
WALLABY_science_Hydra_cluster_2
HI countours from WALLABY (blue) overlaid on a Pan-STARRS image (grey-scale) of ESO 501−G075 near the edge of the Hydra cluster (Reynolds et al., 2021, MNRAS, 505, 1891). The galaxy displays an HI tail directed away from the cluster centre. Credit: Tristan Reynolds.
WALLABY_science_Hydra_cluster
WALLABY-detected galaxies in the Hydra cluster (Wang et al., 2021, ApJ, 915, 70). The HI column density images are shown in different slices of velocity offset from the cluster center (∆vrad) around the X-ray halo of Hydra (grey-scale). The column density images are enlarged by a factor of 5 for clarity. Credit: Jing Wang.
WALLABY_dark_galaxies_2
HI column density contours (left) and HI spectrum (right) of a dark HI cloud overlaid on a deep optical image from the DECam Legacy Survey (Wong et al., 2021, MNRAS, 507, 2905). The bright optical galaxy is a background object unrelated to the foreground HI cloud. Credit: Ivy Wong.
WALLABY_dark_galaxies_1
HI column density contours (left) and HI spectrum (right) of a dark HI cloud overlaid on a deep optical image from the DECam Legacy Survey (Wong et al., 2021, MNRAS, 507, 2905). The bright optical source near the cloud is an intervening foreground star. Credit: Ivy Wong.
NGC4532_DDO137
The interacting galaxy pair NGC 4532 (top) and DDO 137 (bottom), showing the distribution of hydrogen from WALLABY (left) compared to an optical image from the DESI Legacy Survey (right) on the same scale. Credit: Tobias Westmeier/ICRAR.
WALLABY_J124232-000459
The polar ring galaxy NGC 4632, showing the distribution of hydrogen from WALLABY (left) compared to an optical image from the DESI Legacy Survey (right) on the same scale. Credit: Tobias Westmeier/ICRAR.
wallaby_pilot_dr1_norma
Image of a large portion of the sky in the direction of the Norma galaxy cluster, showing the distribution of hydrogen gas in almost 150 galaxies detected by WALLABY during phase 1 of the pilot survey. Credit: Tobias Westmeier/ICRAR.
wallaby_pilot_dr1_ngc4636
Image of a large portion of the sky in the direction of the NGC 4636 galaxy group, showing the distribution of hydrogen gas in almost 150 galaxies detected by WALLABY during phase 1 of the pilot survey. Credit: Tobias Westmeier/ICRAR.
wallaby_pilot_dr1_hydra
Image of a large portion of the sky in the direction of the Hydra galaxy cluster, showing the distribution of hydrogen gas in over 270 galaxies detected by WALLABY during phase 1 of the pilot survey. Credit: Tobias Westmeier/ICRAR.
