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J/A+A/377/428       Abell 970 galaxies radial velocities          (Sodre+, 2001)

The cluster of galaxies Abell 970 Sodre L.Jr., Proust D., Capelato H.V., Lima Neto G.B., Cuevas H., Quintana H., Fouque P. <Astron. Astrophys. 377, 428 (2001)> =2001A&A...377..428S
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Radial velocities Keywords: galaxies: clusters: general - clusters: individual: A970 - distances and redshifts - large-scale structure of Universe - X-ray: general Abstract: We present a dynamical analysis of the galaxy cluster Abell 970 based on a new set of radial velocities measured at ESO, Pic du Midi and Haute-Provence observatories. Our analysis indicates that this cluster has a substructure and is out of dynamical equilibrium. This conclusion is also supported by differences in the positions of the peaks of the surface density distribution and X-ray emission, as well as by the evidence of a large-scale velocity gradient in the cluster. We also found a discrepancy between the masses inferred with the virial theorem and those inferred with the X-ray emission, which is expected if the galaxies and the gas inside the cluster are not in hydrostatic equilibrium. Abell 970 has a modest cooling flow, as is expected if it is out of equilibrium. We propose that cooling flows may have an intermittent behaviour, with phases of massive cooling flows being followed by phases without significant cooling flows after the accretion of a galaxy group massive enough to disrupt the dynamical equilibrium in the centre of the clusters. A massive cooling flow will be established again, after a new equilibrium is achieved. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 54 69 Heliocentric radial velocities for galaxies
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Gal Galaxy number 4- 5 I2 h RAh Right ascension (J2000) 7- 8 I2 min RAm Right ascension (J2000) 10- 13 F4.1 s RAs Right ascension (J2000) 15 A1 --- DE- Declination sign (J2000) 16- 17 I2 deg DEd Declination (J2000) 19- 20 I2 arcmin DEm Declination (J2000) 22- 23 I2 arcsec DEs Declination (J2000) 25- 28 A4 --- MType Morphological type 30- 34 F5.2 mag bmag bj magnitude from the COSMOS/UKST Southern Sky Object Catalogue 35 A1 --- n_bmag [*] *: estimated magnitude 37- 41 I5 km/s HRV Heliocentric radial velocity 43- 45 I3 km/s e_HRV rms uncertainty on HRV 47- 51 F5.2 --- R Signal-to-noise measure derived from Tonry & Davis (1979AJ.....84.1511T) 53 A1 --- Tel [oep] Telescope (1) 54 A1 --- Note Note (2)
Note (1): Telescopes: e: 1.52m ESO telescope o: 1.93m OHP telescope p: 2.0 m Pic du Midi telescope Note (2): Notes 1: Emission lines velocity: [OIII], Hα, [SII] = 12084km/s 2: Emission lines velocity: Hα = 22087 km/s 3: Emission lines velocity: Hα = 18858 km/s 4: Emission lines velocity: Hα = 17234 km/s 5: Emission lines velocity: Hα = 17523 km/s 6: Measured on Hβ, [OIII], Hα
History: From electronic version of the journal
(End) Patricia Bauer [CDS] 27-Sep-2001
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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