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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We investigate the influence of stellar bulges on the star formation andmorphology of disc galaxies that suffer from ram pressure. Several tree-SPH(smoothed particle hydrodynamics) simulations have been carried out to studythe dependence of the star formation rate on the mass and size of a stellarbulge. In addition, different strengths of ram pressure and differentalignments of the disc with respect to the intra-cluster medium (ICM) areapplied. As claimed in previous works, when ram pressure is acting on a galaxy,the star formation rate (SFR) is enhanced and rises up to four times withincreasing ICM density compared to galaxies that evolve in isolation. However,a bulge suppresses the SFR when the same ram pressure is applied. Consequently,fewer new stars are formed because the SFR can be lowered by up to 2 M_sun/yr.Furthermore, the denser the surrounding gas, the more inter-stellar medium(ISM) is stripped. While at an ICM density of 10^-28 g/cm^3 about 30% of theISM is stripped, the galaxy is almost completely (more than 90%) stripped whenan ICM density of 10^-27 g/cm^3 is applied. But again, a bulge prevents thestripping of the ISM and reduces the amount being stripped by up to 10%.Thereby, fewer stars are formed in the wake if the galaxy contains a bulge. Thedependence of the SFR on the disc tilt angle is not very pronounced. Hereby aslight trend of decreasing star formation with increasing inclination angle canbe determined. Furthermore, with increasing disc tilt angles, less gas isstripped and therefore fewer stars are formed in the wake. Reducing the discgas mass fraction results in a lower SFR when the galaxies evolve in vacuum. Onthe other hand, the enhancement of the SFR in case of acting ram pressure isless pronounced with increasing gas mass fraction. Moreover, the fractionalamount of stripped gas does not depend on the gas mass fraction.

Galaxies undergoing ram-pressure stripping: the influence of the bulge on morphology and star formation rate