3 ms·
Focus on NANOGrav's 15yr Data Set and the Gravitational Wave Background
- perihelions 3y agohttps://news.ycombinator.com/item?id=36520925 https://news.ycombinator.com/item?id=36520925 (178 comments) https://news.ycombinator.com/item?id=36514521 https://news.ycombinator.com/item?id=36514521 (64 comments) https://news.ycombinator.com/item?id=36514593 https://news.ycombinator.com/item?id=36514593 (4 comments) https://news.ycombinator.com/item?id=36515388 https://news.ycombinator.com/item?id=36515388 (2 comments)
- magicalhippo 3y agoOne of the collaborators had a presentation[1] of the project over at PIRSA[2] a couple of years ago. I found it very interesting, thought I'd share. [1]: https://pirsa.org/20100068 https://pirsa.org/20100068 [2]: https://pirsa.org/About https://pirsa.org/About
- denton-scratch 3y agoThis is the first article I've read about this project that focuses on the noise aspect of the signal. Most articles on the subject mention that the signal they're detecting comes from many, many binary pairs, each generating what is presumably a roughly sinusoidal GW signal. But if you overlay many sine waves of unrelated frequencies, you end up with noise. The wavelength they're probing is 10-15 LY (the project's been running for 15 years). No article that I've read goes into the character of the binary pairs they suggest is the source, but presumably they have orbital periods in the 10-15 year range, so they must be separated by at least that distance. /me strictly a layman