期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 402, 期 3, 页码 1807-1815出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1365-2966.2009.16001.x
关键词
galaxies: formation; galaxies: fundamental parameters; galaxies: interactions; galaxies: statistics; galaxies: structure; cosmology: observations
资金
- CONACYT
- DGAPA-UNAM [IN114107]
- Korea Science and Engineering Foundation (KOSEF) through the Astrophysical Research Center for the Structure and Evolution of the Cosmos (ARCSEC)
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- Ministry of Education, Science & Technology (MoST), Republic of Korea [PG016902] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We search for correlations between the spins in pairs of spiral galaxies, to study if the angular momentum gain for each galaxy was the result of tidal torques imprinted by the same tidal field. To perform our study we made use of a sample of galaxy pairs identified using the Sloan Digital Sky Survey. We find a weak, but statistically significant correlation between the spin magnitudes of neighbouring galaxies, but no clear alignment between their orientations. We show that events such as interactions with close neighbours play an important role in the value of the spin for the final configuration, as we find that these interactions tend to reduce the value of the lambda spin parameter of late-type galaxies considerably, with dependence on the morphology of the neighbour. This implies that the original tidal field for each pair could have been similar, but the redistribution of angular momentum at later stages of evolution is important.
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