Large-scale environments of narrow-line Seyfert 1 galaxies

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Table 3

Average density of the whole SDSS LRG sample and the NLS1 subsamples, and percentage in voids, intermediate density regions, and superclusters.

	N	Average density	LD^a < 1 (%)	1 < LD < 3 (%)	LD > 3 (%)

All	960	1.50 ± 0.04	44	44	12
RS	799	1.48 ± 0.05	45	43	12
RD	161	1.61 ± 0.10	40	47	13
RQ	73	1.48 ± 0.08	40	52	8
RL	74	1.66 ± 0.16	41	43	16
VRL	13	2.01 ± 0.36	38	38	23
RL and VRL	87	1.71 ± 0.14	40	43	17


Sy1 galaxies^b	1095	1.73 ± 0.04	34	51	15
Sy2 galaxies^b	2494	1.65 ± 0.03	35	52	13

Notes.

^(a)

LD = mean luminosity-density of the LDF.

^(b)

Lietzen et al. (2011).

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