We present VLA H I observations of JO206 , a prototypical ram-pressure stripped galaxy in the GASP sample .
This massive galaxy ( M _ { \ast } = 8.5 \times 10 ^ { 10 } { M } _ { \odot } ) is located at a redshift of z = 0.0513 , near the centre of the low-mass galaxy cluster , IIZw108 ( \sigma \sim 575 km s ^ { -1 } ) .
JO206 is characterised by a long tail ( \geq 90 kpc ) of ionised gas stripped away by ram-pressure .
We find a similarly long H I tail in the same direction as the ionised gas tail and measure a total H I mass of 3.2 \times 10 ^ { 9 } { M } _ { \odot } .
This is about half the expected H I mass given the stellar mass and surface density of JO206 .
A total of 1.8 \times 10 ^ { 9 } { M } _ { \odot } ( 60 % ) of the detected H I is in the gas stripped tail .
An analysis of the star formation rate shows that the galaxy is forming more stars compared to galaxies with the same stellar and H I mass .
On average we find a H I gas depletion time of \sim 0.5 Gyr which is about four times shorter than that of “ normal ” spiral galaxies .
We performed a spatially resolved analysis of the relation between star formation rate density and gas density in the disc and tail of the galaxy at the resolution of our H I data .
The star formation efficiency of the disc is about 10 times higher than that of the tail at fixed H I surface densities .
Both the inner and outer parts of JO206 show an enhanced star formation compared to regions of similar H I surface density in field galaxies .
The enhanced star formation is due to ram-pressure stripping during the galaxy ’ s first infall into the cluster .