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EXTREMELY ISOLATED EARLY-TYPE GALAXIES IN THE SLOAN DIGITAL SKY SURVEY. I. THE SAMPLE
被引:12
|作者:
Fuse, C.
[1
,2
]
Marcum, P.
[2
]
Fanelli, M.
[2
,3
]
机构:
[1] Rollins Coll, Dept Phys, Winter Pk, FL 32789 USA
[2] Texas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA
[3] NASA, Ames Res Ctr, BAER Inst, Mountain View, CA 94035 USA
基金:
美国国家科学基金会;
美国国家航空航天局;
关键词:
galaxies: elliptical and lenticular;
cD;
galaxies: photometry;
SURVEY PHOTOMETRIC SYSTEM;
ELLIPTIC GALAXIES;
AMIGA SAMPLE;
X-RAY;
CATALOG;
FIELD;
ENVIRONMENTS;
DENSITY;
D O I:
10.1088/0004-6256/144/2/57
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We describe the properties of a sample of extremely isolated early-type galaxies (IEGs) selected from the spectroscopic Sloan Digital Sky Survey. Sample galaxies are isolated from nearest neighbors more luminous than M-V = -16.5 by a minimum distance corresponding to 2.5 Mpc and 350 km s (1) in redshift space. The candidate IEGs exhibit a number of unusual features as compared to bulge-dominated galaxies in cluster and group environments, including fainter luminosities, blue colors suggesting possible recent star formation, and smaller physical sizes. The paper is the first in a series analyzing this isolated galaxy sample.
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页数:9
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