Galaxy Zoo: Chiral correlation function of galaxy spins
| Autor: | Kate Land, Alexander S. Szalay, Anÿze Slosar, Chris Lintott, M. Jordan Raddick, Jan Vandenberg, Steven P. Bamford, Phil Murray, Robert C. Nichol, Daniel Thomas, Dan Andreescu, Kevin Schawinski |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Cosmology and Gravitation Spiral galaxy Spins Astrophysics (astro-ph) Sigma FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Correlation function (astronomy) Rotation Galaxy Space and Planetary Science Spiral Astrophysics::Galaxy Astrophysics Spin-½ |
| Zdroj: | Slosar, A, Land, K, Bamford, S P, Lintott, C J, Andreescu, D, Murray, P, Nichol, B, Raddick, M J, Schawinski, K, Szalay, A S, Thomas, D & Vandenberg, J 2009, ' Galaxy Zoo : chiral correlation function of galaxy spins ', Monthly Notices of the Royal Astronomical Society, vol. 392, no. 3, pp. 1225-1232 . https://doi.org/10.1111/j.1365-2966.2008.14127.x |
| Popis: | Galaxy Zoo is the first study of nearby galaxies that contains reliable information about the spiral sense of rotation of galaxy arms for a sizeable number of galaxies. We measure the correlation function of spin chirality (the sense in which galaxies appear to be spinning) of face-on spiral galaxies in angular, real and projected spaces. Our results indicate a hint of positive correlation at separations less than ~0.5 Mpc at a statistical significance of 2-3 sigma. This is the first experimental evidence for chiral correlation of spins. Within tidal torque theory it indicates that the inertia tensors of nearby galaxies are correlated. This is complementary to the studies of nearby spin axis correlations that probe the correlations of the tidal field. Theoretical interpretation is made difficult by the small distances at which the correlations are detected, implying that substructure might play a significant role, and our necessary selection of face-on spiral galaxies, rather than a general volume-limited sample. 9 pages, 5 figures; v2: minor changes, matches version accepted by MNRAS |
| Databáze: | OpenAIRE |
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