Discussion Overview
The discussion centers around the formation of S0 type galaxies, exploring theories related to their evolution, particularly in the context of star formation cessation and environmental influences. Participants inquire about the differences between S0 and elliptical galaxies, as well as the mass characteristics of S0 galaxies.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant suggests that S0 galaxies may form due to an end to star formation and resultant instability in the disk.
- Another participant proposes that S0 galaxies form by cannibalizing other galaxies.
- A participant questions the differentiation between S0 and elliptical galaxies, seeking clarification on their mass characteristics.
- It is noted that S0 galaxies represent a transition point in galaxy evolution, particularly in cluster environments where mechanisms like strangulation and ram-pressure stripping halt star formation.
- A theoretical perspective is mentioned, highlighting a challenge where models produce satellite galaxies that are too red due to overly efficient star formation quenching.
- Observational data from the Sloan Digital Sky Survey is referenced as a means to understand S0 galaxy formation.
Areas of Agreement / Disagreement
Participants express various hypotheses regarding the formation of S0 galaxies, with no consensus reached on the mechanisms involved or the distinctions from elliptical galaxies.
Contextual Notes
The discussion includes references to specific mechanisms affecting galaxy evolution, but lacks detailed exploration of the underlying assumptions or mathematical models involved.