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NGC 4330 is one of the Virgo galaxies whose UV distribution shows a tailstructure. An associated tail structure is also observed in the HI andH$\alpha$ emission distributions. Previous dynamical modeling showed that thegalaxy is approaching the cluster center and is therefore undergoing increasingram pressure stripping. Recent stellar population fitting of deep opticalspectra together with multiband photometry lead to the determination of thetime when star formation was quenched in the galactic disk. We introduce a newversion of the dynamical model that includes the diffuse ionized gas and aim toreproduce the HI, H$\alpha$, UV distributions together with the star formationhistories of the outer gas-free parts of the galactic disk. The results of 50simulations with five different Lorentzian temporal ram-pressure profiles andfive different delays between the simulation onset and peak ram pressure arepresented. The inclusion of diffuse gas stripping changes significantly the HI,UV, and H$\alpha$ emission distributions. The simulations with diffuse gasstripping naturally lead to vertical low surface density filaments in thedownwind region of the galactic disk. These filaments occur less frequently inthe simulations without diffuse gas stripping. The simulations with diffuse gasstripping lead to better joint fits to the SEDs and optical spectra. The HI,NUV, and H$\alpha$ morphologies of the model snapshots which best reproduce theSEDs and optical spectra are sufficiently different to permit a selection ofbest-fit models. We conclude that the inclusion of diffuse gas strippingsignificantly improves the resemblance between the model and observations. Ourpreferred model yields a time to peak ram pressure of 140 Myr in the future.The spatial coincidence of the radio continuum and diffuse H$\alpha$ tailssuggests that both gas phases are stripped together.

astronomy and astrophysics

A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).  VIII. Modeling ram pressure stripping of diffuse gas in the Virgo cluster  spiral galaxy NGC 4330