EXTREMELY ISOLATED EARLY-TYPE GALAXIES IN THE SLOAN DIGITAL SKY SURVEY. I. THE SAMPLE

Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/144/2/57· OSTI ID:22034381

Fuse, C ^[1]; Marcum, P; Fanelli, M ^[2]

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1. Department of Physics, Rollins College, Winter Park, FL 32789 (United States)
2. Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129 (United States)

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{sub V} = -16.5 by a minimum distance corresponding to 2.5 Mpc and 350 km s{sup -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.

• OSTI ID: 22034381
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 144, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTRONOMY
ASTROPHYSICS
DISTANCE
EMISSION SPECTROSCOPY
GALAXIES
LUMINOSITY
PHOTOMETRY
RED SHIFT
STAR EVOLUTION
STARS