English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Using the VESTIGE survey, a deep narrow-band H$\alpha$ imaging survey of theVirgo cluster carried on at the CFHT with MegaCam, we discovered a long diffusetail of ionised gas in the edge-on late-type galaxy NGC 4330. This peculiarfeature witnesses an ongoing ram pressure stripping (RPS) event able to removethe gas in the outer disc region. Tuned hydrodynamic simulations suggest thatthe RPS event is occurring almost face-on, making NGC 4330 the ideal candidateto study the effects of the perturbation in the direction perpendicular to thedisc plane. We present here two new independent sets of Fabry-Perotobservations (R$\simeq$10000) in order to understand the effects of the RPSprocess on the ionised gas kinematics. Despite their limited sensitivity to thediffuse gas emission, the data allowed us to measure the velocity and thevelocity dispersion fields over the galaxy disc and in several features at theedges or outside the stellar disc formed after the RPS event. We haveconstructed the position-velocity diagrams and the rotation curves of thegalaxy using three different techniques. The data show, consistent with thehydrodynamic simulations, that the galaxy has an inner solid-body rotation upto $\sim$2.4 kpc, with non-circular streaming motions outwards the disc and inthe several external features formed during the interaction of the galaxy withthe surrounding intracluster medium. The data also indicate a decrease of therotational velocity of the gas with increasing distance from the galaxy discalong the tails, suggesting a gradual but not linear loss of angular momentumin the stripped gas. Consistent with a RPS scenario, the $i$-band image shows aboxy shape at the southwest edge of the disc, where the stellar orbits mighthave been perturbed by the modification of the gravitational potential well ofthe galaxy due to the displacement of the gas in the $z$-direction.

astronomy and astrophysics

A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).XI.  Two dimensional H$\alpha$ kinematics of the edge-on ram pressure stripped  galaxy NGC 4330