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J/AJ/115/6          Hercules supercluster kinematics (Barmby+ 1998)

Kinematics of the Hercules supercluster Barmby P., Huchra J.P. <Astron. J. 115, 6 (1998) + Erratum vol. 116, p. 1508> =1998AJ....115....6B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Radial velocities ; Photometry, CCD Keywords: cosmology: observations - dark matter - galaxies: clusters: individual (Hercules) Abstract: The Hercules supercluster consists of the Abell clusters A2147, A2151, and A2152. Previous studies of the kinematics have been confounded by the difficulty of correctly assigning galaxies to the individual clusters, which are not well separated. Our study has a total of 468 available velocities for galaxies in the region, 175 of them new. There are 414 galaxies in the supercluster, about 3 times the number used in the previous supercluster study. We verify the existence of the three individual clusters and compute their individual dynamical parameters. We investigate several techniques for assigning galaxy membership to clusters in this crowded field. We use the Kaye's mixture model (Ashman, Bird, & Zepf, 1994AJ....108.2348A) algorithm to separate the galaxies into clusters; we find that A2152 has a higher mean velocity than previous studies have reported. A2147 and A2152 also have lower velocity dispersions: 821+68-55 and 715+81-61km/s, respectively. The assignment of galaxies to either A2152 or A2147 requires velocity and position information. We study the kinematics of the supercluster using the two-body formalism of Beers, Geller, & Huchra (1982ApJ...257...23B) and conclude that A2147 and A2151 are probably bound to each other and that the supercluster as a whole may also be bound. The mass of the supercluster, if bound, is (7.6±2.0)x1015h-1M; with the supercluster luminosity, (1.4±0.2)x1013h-2L, this yields {OMEGA}=0.34±0.1. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 72 458 *Galaxies in the Hercules supercluster table1.tex 97 486 LaTeX Version of Table 1 72 1271 Postscript version of Table 1 refs.dat 80 33 References quoted in Table 1 table9.dat 45 16 CCD photometry for A2151 galaxies
Note on table1.dat: the printed version of this table had several errors, including typographical errors in coordinates, object misidentifications, and duplicate entries (see "History" section below)
See also: VII/99 : Radial Velocities of Galaxies (Palumbo+ 1986) VII/112 : RC2 Catalogue (de Vaucouleurs+ 1976) VII/155 : RC3 Catalogue (de Vaucouleurs+ 1991) VII/172 : First Byurakan Survey (FBS) (Markarian+, 1989) J/A+AS/109/537 : Redshift survey of faint galaxies (Hopp+, 1995) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 22 A22 --- Name Galaxy name 25- 26 I2 h RAh Right ascension (J2000.0) 28- 29 I2 min RAm Right ascension (J2000.0) 31- 35 F5.2 s RAs Right ascension (J2000.0) 37 A1 --- DE- Declination sign 38- 39 I2 deg DEd Declination (J2000.0) 41- 42 I2 arcmin DEm Declination (J2000.0) 44- 48 F5.2 arcsec DEs Declination (J2000.0) 51- 54 F4.1 mag Rmag R magnitude 58- 62 I5 km/s HV Heliocentric velocity 64- 66 I3 km/s e_HV rms uncertainty on HV 68 A1 --- MType Morphological type 71- 72 I2 --- r_HV [1/32] Velocity source, see refs.dat
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Name Galaxy name 17- 18 I2 h RAh Right ascension (J2000.0) 20- 21 I2 min RAm Right ascension (J2000.0) 23- 24 I2 s RAs Right ascension (J2000.0) 26 A1 --- DE- Declination sign 27- 28 I2 deg DEd Declination (J2000.0) 30- 31 I2 arcmin DEm Declination (J2000.0) 33- 34 I2 arcsec DEs Declination (J2000.0) 36- 40 F5.2 mag Bmag B magnitude 42- 45 F4.2 mag B-R B-R colour index
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- RefCode [1/32]+= Reference code 4- 80 A77 --- Text Text of reference (including the 19-digit bibcode)
History: * 05-Mar-1998: Copied from the electronic version of AJ * 02-Jun-1998 (from Pauline Barmby, ) Table 1, Galaxies in the Hercules Supercluster, had several errors, including typographical errors in coordinates, object misidentifications, and duplicate entries. We have corrected these errors and determined that they not do not affect the conclusions of the paper. A corrected version of the table, containing 458 galaxies with velocities (171 new velocities) is available in the electronic version of the paper. We thank M. Schmitz for bringing some of the errors to our attention. * September 1998: Erratum published in AJ.
(End) Patricia Bauer [CDS] 05-Mar-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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