The close environment of 24 micron galaxies at 0.6<z<1.0 in the COSMOS field

Details The close environment of 24 micron galaxies at 0.6<z<1.0 in the COSMOS field The close environment of 24 micron galaxies at 0.6<z<1.0 in the COSMOS field

2008-08-26

arxiv.org/abs/0808.3407v2

Astrophys.J.691:91-97,2009

Astronomy and Astrophysics

Astrophysics

ApJ, in press. 9 pages, including 5 figures

Scientific paper

10.1088/0004-637X/691/1/91

We investigate the close environment of 203 Spitzer 24 micron-selected sources at 0.61.4. We find that LIRGs at 0.61.4 within 1 Mpc and +/- 500 km/s). The contrast between the activities of the close environments of LIRGs and ULIRGs appears especially enhanced in the COSMOS field density peak at z~0.67, because LIRGs on this peak have a larger fraction of passive neighbours, while ULIRGs have as active close environments as those outside the large-scale structure. The differential environmental activity is related to the differences in the distributions of stellar mass ratios between LIRGs/ULIRGs and their close neighbours, as well as in the general local density fields. At 0.8

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