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

In a 5 hour Halpha exposure of the N-W region of the Coma cluster with the2.1m telescope at SPM (Mx) we discovered a 65 kpc cometary emission of ionizedgas trailing behind the SBab galaxy NGC 4848. The tail points in the oppositedirection of the cluster center, in the same direction where stripped HI hasbeen detected in previous observations. The galaxy shows bright HII regions inan inner ring-like pattern, where the star formation takes place at theprodigious rate of 8.9 Msun/yr. From the morphology of the galaxy and of thetrailing material, we infer that the galaxy is suffering from ram pressure dueto its high velocity motion through the cluster IGM. We estimate that 4 x 10^9Msun of gas is swept out from the galaxy forming the tail. Given the ambientconditions in the Coma cluster (rho = 6.3 x 10^-27 g/cm^3; sigma_vel = 940km/s) simulations predict that the ram pressure mechanism is able to removesuch an amount of gas in less than 200 Myr. This, combined with the geometry ofthe interaction, indicating radial infall into the cluster, leads to theconclusion that NGC 4848 is caught in its first passage through the densecluster environment.

65 kpc of ionized gas trailing behind NGC 4848 during its first crossing of the Coma cluster