Discussion Overview
The discussion revolves around the concept of ram pressure and its effects on galaxies, particularly how it can inhibit star formation and potentially lead to galaxy "extinction." Participants explore the mechanisms of ram pressure, its implications in galaxy clusters, and the conditions under which it occurs.
Discussion Character
- Exploratory
- Debate/contested
- Conceptual clarification
Main Points Raised
- Some participants inquire about the definition of ram pressure and its role in galaxy dynamics, particularly in relation to star formation.
- One participant references an article stating that galaxies in clusters experience ram pressure as they move through the intracluster medium, which can strip them of interstellar gas.
- There is a question raised about the lack of observable effects of ram pressure on many galaxies, suggesting that not all galaxies experience this phenomenon equally.
- Another participant compares ram pressure to air resistance, noting the absence of air in space, which prompts further exploration of the concept.
- A later reply mentions that plasma is responsible for the stripping effect, indicating a potential mechanism behind ram pressure's impact on galaxies.
Areas of Agreement / Disagreement
Participants express curiosity and confusion about ram pressure, with no consensus on why it affects some galaxies more than others. Multiple viewpoints regarding its implications and mechanisms remain present.
Contextual Notes
Participants have not fully defined the conditions under which ram pressure operates, nor have they resolved the discrepancies in observable effects among different galaxies.
. New question: why not all over the place ? Dunno. The galaxy has to move through the cluster center (the ICM lemma gives no size range).