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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 172 Properties of sample galaxies
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See also:
J/AJ/109/874 : Kinematics of MKW and AWM Poor Clusters (Beers+ 1995)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Ab: absence of Hα
Em: emission-line Hα equivalent widths typically >7Å
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History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 15-Dec-1998