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Wang Yun's user avatar
Wang Yun's user avatar
Wang Yun's user avatar
Wang Yun
  • Member for 3 years, 10 months
  • Last seen more than a week ago
  • China
12 votes
2 answers
3k views

Why do people choose 0.2 as the value of linking length in the friends-of-friends algorithm?

5 votes
1 answer
796 views

Is there any way to detect the three-dimensional distribution of baryonic gas in our Universe?

4 votes
1 answer
88 views

How to locate helpful and instructive books and resources about numerical methods in cosmology?

2 votes
1 answer
63 views

Is there any method that enables us to observe the 3D large-scale spatial distribution of the dark matter?

2 votes
1 answer
111 views

Why is the boundary of friends-of-friends (FOF) halo corresponding to iso-density contour?

2 votes
1 answer
447 views

What do "overdense" and "underdense" mean in cosmology?

2 votes
0 answers
54 views

What are the one-dimensional observables that can reveal the matter clustering properties of the Universe?

1 vote
0 answers
80 views

Are there galaxy clusters or dark matter halos in the void?

1 vote
2 answers
123 views

Why is the probability dP of finding an object (e.g. galaxy) in an infinitesmal volume dV equal to \overline{n}dV?