/ftp/cats/aliases/P/PPS



==========================================================================
J/A+AS/130/341      Groups of Galaxies in PPS (Trasarti-Battistoni 1998)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
	table1.dat
==========================================================================
Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+AS/130/341
==========================================================================

drwxr-xr-x 24 cats archive 4096 Jan 29 2012 [Up] drwxr-xr-x 2 cats archive 219 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 464 Dec 19 2022 .message -r--r--r-- 1 cats archive 5409 Aug 30 2007 ReadMe -rw-r--r-- 1 cats archive 334 Nov 13 2012 +footg5.gif -rw-r--r-- 1 cats archive 3345 Nov 13 2012 +footg8.gif -r--r--r-- 1 cats archive 5152 Nov 10 1998 table1.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : J/A+AS/130/341 Groups of Galaxies in PPS (Trasarti-Battistoni 1998) ================================================================================ Loose Groups of Galaxies in the Perseus-Pisces Survey Trasarti-Battistoni R. <Astron. Astrophys. Suppl. Ser. 130, 341 (1998)> =1998A&AS..130..341T (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Galaxy catalogs ; Velocity dispersion Keywords: catalogs - Galaxies: cluster of ; luminosity function - Cosmology: Large Scale Structure of the Universe. Abstract: We present a large catalog of galaxy loose groups in the Southern Galactic Hemisphere, selected from the Perseus-Pisces redshift Survey (PPS). Particular care is taken in order to obtain group samples as homogeneous as possible to previously published catalogs. Groups are identified with the adaptive Friends-of-Friends (FoF) algorithm of Huchra & Geller (1982ApJ...257..423H), with suitable normalizations V_0_=350km/s and D_0_=0.231h.Mpc. As a necessary ingredient of FoF algorithms, we obtain the galaxy luminosity function (LF) for PPS. Its Schechter parameters (alpha=-1.15+/-0.15, M_*_=-19.3+/-0.1) are in good agreement with similar LF estimates from samples previously used to select groups. The LF normalizations phi_*_=0.02h^3^/Mpc^3^ appropriate for PPS yields a density threshold deltan/n 180 for the adopted D_0_, apparently rather different from the desired deltan/n 80 used in previous studies. We then consider several other link normalizations, and briefly discuss their effect on group properties. We suggest to replace the customarily adopted deltan/n parametrization with the more direct D_0_ parametrization. All our catalogs contain N_G_ 200 groups, significantly more than in most previous studies where group samples were obtained from galaxy data sets of comparable quality to (but smaller extent than) PPS. The group properties are rather sensitive to the adopted D_0_ and V_0_, but vary little with different redshift corrections, redshift cut-off, and galaxy LF. Loose groups in PPS nicely trace the large scale structure (LSS) in the parent galaxy sample. Physical properties of groups in PPS and in other directly comparable samples are in good agreement. There seems to be a complex interplay among LSS features, FoF grouping procedure, and group properties.