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J/AJ/116/2108       AWM 7 radial velocities              (Koranyi+, 1998)

A photometric and kinematic study of AWM 7. Koranyi D.M., Geller M.J., Mohr J.J., Wegner G. <Astron. J. 116, 2108 (1998)> =1998AJ....116.2108K (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Radial velocities ; Magnitudes Keywords: galaxies: clusters: individual: AWM 7 - galaxies: luminosity function, mass function Abstract: We have measured redshifts and Kron-Cousins R-band magnitudes for a sample of galaxies in the poor cluster AWM 7. We have measured redshifts for 172 galaxies; 106 of these are cluster members. We determine the luminosity function (LF) from a photometric survey of the central 1.2x1.2h-1Mpc. The LF has a bump at the bright end and a faint-end slope of α=-1.37±0.16, populated almost exclusively by absorption-line galaxies. The cluster velocity dispersion is lower in the core (∼530km/s) than at the outskirts (∼680km/s), consistent with the cooling flow seen in the X-ray. The cold core extends ∼150h-1kpc from the cluster center. The Kron-Cousins R-band mass-to-light ratio of the system is 650±170hM/L, substantially lower than previous optical determinations, but consistent with most previous X-ray determinations. We adopt H0=100hkm/s/Mpc throughout this paper; at the mean cluster redshift (5247±76km/s), 1h-1Mpc subtends 65.5'. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 59 172 Properties of sample galaxies
See also: J/AJ/109/874 : Kinematics of MKW and AWM Poor Clusters (Beers+ 1995) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right ascension (J2000.0) 4- 5 I2 min RAm Right ascension (J2000.0) 7- 11 F5.2 s RAs Right ascension (J2000.0) 13 A1 --- DE- Declinatin sign (J2000.0) 14- 15 I2 deg DEd Declination (J2000.0) 17- 18 I2 arcmin DEm Declination (J2000.0) 20- 24 F5.2 arcsec DEs Declination (J2000.0) 26- 30 I5 km/s RV Radial velocity 32- 36 F5.1 km/s e_RV rms uncertainty on RV 38- 42 F5.2 mag Rmag Isophotal magnitude (to 23.5mag/arcsec2 in RKC) 44- 48 F5.3 mag e_Rmag rms uncertainty on Rmag 50- 51 A2 --- r_Rmag Source of the magnitude (CCD frame number or P for POSS) 53- 54 A2 --- Em Emission type (1) 56- 59 F4.2 mag AR Extinction AR along the line of sight to the galaxy
Note (1): Ab: absence of Hα Em: emission-line Hα equivalent widths typically >7Å
History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 15-Dec-1998
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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