2025.8.25 - 2025.8.31

Weekly Research Summary

Date: 2025.8.25-2025.8.31

1. Overview

Last week I focus on classifying galaxies (/home/yangyao/work/projects/obs/dwarf_assembly_bias/workspace/data/obs) and measure their 2PCCF with tidal field.

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2. Activities and Progress

2.1 Code Review

• Write class_dwarf.py to process the data.
• Calculate 2PCCF of other 2 kinds of galaxies ($7\leqslant\Sigma_*<15$ and $15\leqslant\Sigma_* <25$)

2.2 Theoretical Insights

• Physical meaning of the 8 properties of the galaxy. Here's a short note I wrote before.

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3. Challenges

When I try to reproduce the Fig2. in Ziwen's paper, and further estimate the other 2 kinds of galaxies, I encountered some problems.

Problem: The $\xi(r)$ between dwarf galaxies and void/sheet tidal field cannot match with the result in the paper:
My result

Result in the paper

BUT I compare my result with the result from the data in Yangyao's Github (diffuse sample), and they seemly matched:

Further, I also check my data with Extended Data Table 1 in the paper and they are totally same:
My data (diffuse, low-mid-surface-density, high-mid-surface-density, compact)

Extended Data Table 1

I wonder whether there's any detail I have not noticed?

Finally, here're the result of four kinds of dwarf with four kinds of web types.

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4. AI Tools Utilized

• Chat-GPt-4o. Via Copilot to help me reading codes
• Gemini-2.5Pro. Explain physical concepts so that I can quickly get a picture of a physical terms.
• Claude Sonnet 4. Coding...