期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 390, 期 1, 页码 L9-L13出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2008.00520.x
关键词
large-scale structure of Universe
资金
- Consejo de Investigaciones Cientificas y Tecnicas de la Republica Argentina (CONICET)
- Secretaria de Ciencia y Tecnica de la Universidad Nacional de Cordoba (SeCyT)
- Fundacion Antorchas, Argentina
- Agencia Cordoba Ciencia
- Centro de Astrofi sica FONDAP
- Proyecto Fondecyt [1071006]
- Latin-American and European Network for Astrophysics and Cosmology (LENAC)
- Latin-American and European Network for Astrophysics and Cosmology (LENAC) [7070045]
We perform a statistical study of the characteristics of galaxies in voids and void walls in the Sloan Digital Sky Survey and 2dF Galaxy Redshift Survey catalogues. We investigate dependencies of the distribution of galaxy spectral types and colours as a function position to void centres for different luminosity and local density ranges. We find a trend towards bluer, star-forming galaxies in void walls beyond the local density dependence. These results indicate that luminosity and local density do not entirely determine the distribution of galaxy properties such as colours and spectral types, and point towards a large-scale modulation of star formation. We argue that this effect is due to the lower accretion rate and merger histories of galaxies that arriving at void walls from the emptier inner void regions.
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