.:Analysis:.

--Environmental Factors--

-Morphology of Galaxies-

        Using the HST and EDisCS data, each galaxy in the cluster was labeled according to their HST morphological code. Additionally, the HST types (classified by EDisCS) were broken into 4 groups corresponding to their evolution along the Hubble Sequence. Values of –7 to –1 were ranked as elliptical type, 1 to 4 as early type spiral galaxies, 5 to 8 as late type spiral galaxies, and 11 as irregular galaxies.

            These new groups were also correlated against SFR individually as well as on an averaged basis versus each other to reveal how the groups of HST types behave (figure 1).

There were, however, some cluster members of which the HST type could not be identified, and they were therefore excluded from this particular aspect as well as correlations to radius and SFR.

In CL1037, when taking the average for each HST grouping, there at first appears to be no obvious trend when advancing on the Hubble Tuning Fork, but when removing two abnormal merging galaxies (see page 8), a trend is apparent. The elliptical galaxies have a rather low average SFR, as would be expected, followed by a spike in early type spiral galaxy SFR and a gradual downward trend from late type spirals to irregular galaxies.

Unlike the previous cluster, in CL1227 the trend of increasing then decreasing SFR in the different types of morphologies peaks in the late type spirals as opposed to the early type. However, when removing 3 somewhat outstanding outliers (to be explained in the mergers section of the analysis), the previously mentioned trend is reproduced in the data.

In CL1232, a similar trend also exists as in CL1037, until reaching the irregular type galaxies. This could possibly be explained by an outlier and small sampling size for the group.