# Extended ionized gas clouds in the Abell 1367 cluster

## TL;DR

This study surveyed the Abell 1367 galaxy cluster, discovering new extended ionized gas clouds, analyzing their properties, and comparing them to those in the Coma cluster to infer evolutionary differences.

## Contribution

The paper reports the discovery of six new EIGs in Abell 1367 and compares their properties with those in the Coma cluster, highlighting differences in cluster evolution.

## Key findings

- Six new EIGs discovered in Abell 1367
- Halpha tail from BIG extends to 330 kpc, twice previous length
- Fewer detached EIGs and higher blue galaxy fraction in Abell 1367

## Abstract

We surveyed a central 0.6 deg^2 region of Abell 1367 cluster for extended ionized gas clouds (EIGs) using the Subaru prime-focus camera (Suprime-Cam) with a narrow-band filter that covers Halpha. We discovered six new EIGs in addition to five known EIGs. We also found that the Halpha tail from the blue infalling group (BIG) is extended to about 330 kpc in projected distance, which is about twice longer than previously reported. Candidates of star-forming blobs in the tail are detected. The properties of the EIG parent galaxies in Abell 1367 basically resemble those in the Coma cluster. A noticeable difference is that the number of detached EIGs is significantly fewer in Abell 1367, while the fraction of blue member galaxies is higher. The results suggest a difference in the evolutionary stage of the clusters; Abell 1367 is at an earlier stage than the Coma cluster.