Mathematics – Logic
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9701f&link_type=abstract
American Astronomical Society, AAS Meeting #211, #97.01; Bulletin of the American Astronomical Society, Vol. 39, p.903
Mathematics
Logic
Scientific paper
Highly isolated systems provide a framwork for exploring the role of interactions within galaxy evolution. We use the spectroscopic component of the Sloan Sky Survey to select extremely isolated galaxies in the nearby universe. Redshifts derived from the Sloan spectra permit a three-dimensional assessment of the local environment surrounding candidate isolated systems. The lack of redshifts has strongly limited prior searches for isolated systems. We have constructed a searchable database for the 600K objects contained in the Sloan Survey.. Isolated systems are chosen utilizing a range of criteria, including projected physical separations, differential velocities, and luminosity limits for potential dwarf companions. We describe the morphological, photometric and star formation properties of the most isolated systems found within the SDSS footprint. Highly isolated systems are extremely rare, most are blue, and exhibit ongoing star formation. One object appears to be a merging compact group.
We acknowledge support from NASA's Astrophysical Data Program, grant #NNG05C53G.
Aars Christian
Fanelli Michael N.
Fuse Chris
Marcum Pamela Marie
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