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Message boards : MilkyWay@home Science : please show me some illustrations of the process.

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refla
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Message 51808 - Posted: 3 Dec 2011, 7:05:48 UTC

hi, everybody, I am translating English to Chinese.

http://en.wikipedia.org/wiki/MilkyWay@Home

The following text comes from wikipedia:

Using data from the Sloan Digital Sky Survey, MilkyWay@home divides starfields into wedges of about 2.5 deg. width and applies self-optimizing probabilistic separation techniques (i.e., evolutionary algorithms) to extract the optimized tidal streams. The program then attempts to create a new, uniformly dense wedge of stars from the input wedge by removing streams of data. Each stream removed is characterized by 6 parameters: percent of stars in the stream; the angular position in the stripe; the three spatial components (two angles, plus radial distance from Earth) defining the removed cylinder; and a measure of width. For each search, the server application keeps track of a population of individual stars, each of which is attached to a possible model of the Milky Way.


I can do it accuratly because I have no knowledge about this.

please show me some illustrations of the process.

best regard

Matthew
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Message 51838 - Posted: 5 Dec 2011, 18:40:37 UTC

Hello,

Thanks for translating the wikipedia page! You should find a useful diagram in Nathan Cole's Astrophysical Journal Paper:

http://wcl.cs.rpi.edu/papers/cole-apj-2008.pdf

Figure 1 is a diagram of the wedge model. Subsubsections 2.3.1 and 2.3.2 describe the tidal stream model and background models, respectively.

A lot of useful information is contained in our info page (accessible from the Milkyway@home's home page):

http://milkyway.cs.rpi.edu/milkyway/information.php

I'm working on a updated summary, but it's slow going. Let me know if you have more questions.

Cheers,
Matthew Newby

refla
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Message 51893 - Posted: 10 Dec 2011, 0:26:09 UTC - in response to Message 51838.

Hi, Matthew

Thanks, I have gotten it and I am studying it.

refla
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Message 52013 - Posted: 19 Dec 2011, 0:26:42 UTC

Merry Christmas !

Here is the draft.

http://www.equn.com/forum/redirect.php?goto=findpost&ptid=32977&pid=435363&fromuid=12125


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