NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-13 T09:36:27 PST
Help | Comment | NED Home

For refcode 2000ApJS..130..237T:
Retrieve 9106 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2000ApJS..130..237T Loose Groups of Galaxies in the Las Campanas Redshift Survey Douglas L. Tucker Fermi National Accelerator Laboratory, MS 127, PO Box 500, Batavia, IL 60510; dtucker@fnal.gov Augustus Oemler, Jr., Yasuhiro Hashimoto, and Stephen A. Shectman Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101; oemler@ociw.edu, hashimoto@vorpal.ociw.edu, shec@ociw.edu Robert P. Kirshner Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; kirshner@cfa.harvard.edu Huan Lin Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721; hlin@as.arizona.edu Stephen D. Landy Department of Physics, College of William and Mary, Williamsburg, VA 23187; landy@physics.wm.edu Paul L. Schechter Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139; schech@achernar.mit.edu and Sahar S. Allam National Research Institute for Astronomy and Geophysics, Helwan Observatory, Cairo, Egypt; shr@frcu.eun.eg Received 1998 December 14; accepted 2000 April 5 ABSTRACT A "friends-of-friends" percolation algorithm has been used to extract a catalog of {delta}n/n = 80 density enhancements (groups) from the six slices of the Las Campanas Redshift Survey (LCRS). The full catalog contains 1495 groups and includes 35% of the LCRS galaxy sample. A clean sample of 394 groups has been derived by culling groups from the full sample that either are too close to a slice edge, have a crossing time greater than a Hubble time, have a corrected velocity dispersion of zero, or contain a 55" "orphan" (a galaxy with a mock redshift that was excluded from the original LCRS redshift catalog due to its proximity to another galaxy-i.e., within 55"). Median properties derived from the clean sample include a line-of-sight velocity dispersion {sigma}_los_ = 164 km s^-1^, crossing time t_cr_ = 0.10 H_0_^-1^, harmonic radius R_h_ = 0.58 h^-1^ Mpc, pairwise separation R_p_ = 0.64 h^-1^ Mpc, virial mass M_vir_ = 1.90 x 10^13^ h^-1^ M_sun_, total group R-band luminosity L_tot_ = 1.30 x 10^11^ h^-2^ L_sun_, and R-band mass-to-light ratio M/L = 171 h M_sun_/L_sun_; the median number of observed members in a group is three. Subject headings: catalogs-galaxies: clusters: general-galaxies: distances and redshifts-large-scale structure of universe-surveys
Retrieve 9106 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home