J/A+A/392/795 Multi-wavelength study of 2 galaxy clusters (Valtchanov+, 2002)
Abell 1451 and 1RXS J131423.6-251521:
A multi-wavelength study of two dynamically perturbed clusters of galaxies.
Valtchanov I., Murphy T., Pierre M., Hunstead R., Lemonon L.
<Astron. Astrophys. 392, 795 (2002)>
=2002A&A...392..795V 2002A&A...392..795V
ADC_Keywords: Clusters, galaxy ; Redshifts ; Radio sources ; X-ray sources ;
Magnitudes
Keywords: galaxies: clusters: individual: Abell 1451, 1RXS J131423.6-251521 -
X-rays: galaxies - radio lines: galaxies -
galaxies: distances and redshifts - galaxies: clusters: general
Abstract:
We present results from optical, X-ray and radio observations of two
X-ray bright (LX∼1045erg/s) galaxy clusters. Abell 1451 is at
redshift z=0.1989 and has line-of-sight velocity dispersion
σV=1330km/s as measured from 57 cluster galaxies. It has
regular X-ray emission without signs of substructure, a Gaussian
velocity distribution, lack of a cooling flow region and significant
deviations from the observed scaling laws between luminosity,
temperature and velocity dispersion, indicating a possible merging
shock. There is only one spectroscopically confirmed cluster radio
galaxy, which is close to the X-ray peak. 1RXS J131423.6-251521 (for
short RXJ1314-25) has z=0.2474 and σV=1100km/s from 37
galaxies. There are two distinct galaxy groups with a projected
separation of ∼700kpc. The velocity histogram is bi-modal with a
redshift-space separation of ∼1700km/s, and the X-ray emission is
double peaked. Although there are no spectroscopically confirmed
cluster radio galaxies, we have identified a plausible relic source
candidate.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 86 81 A1451 spectroscopic catalogue
table4.dat 83 48 1RXS J131423.6-25152 spectroscopic catalogue
table11.dat 79 40 Radio sources for Abell 1451 and 1RXS J131423.6-25152
within 1 Abell radius of the cluster centre
table12.dat 50 15 Radio-optical identifications in Abell 1451
and 1RXS J131423.6-25152
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Table 2: Summary of the multi-slit spectroscopic observations.
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Date Object RA (2000) DE Airmass MOS Exposure
masks/slits
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1993 Mar 29 Abell 1451 12:03:15 -21:31:36 1.2 1/15 900
1993 Mar 29 RXJ1314-25 13:14:29 -25:16:25 1.1 1/15 2x900+1800
1999 Apr 19/20 Abell 1451E 12:03:12 -21:33:25 1.34 2/20+21 3x1800/4x2100
1999 Apr 19/20 Abell 1451W 12:03:23 -21:33:25 1.40 2/21+19 2x3600/4x2100
1999 Apr 19/20 RXJ1314-25N 13:14:22 -25:14:55 1.06 2/17+18 2x3600/4x2100
1999 Apr 19/20 RXJ1314-25S 13:14:22 -25:17:55 1.04 2/17+18 4x1800/4x2100
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number of the source in the cluster
3 A1 --- n_Seq [*] *: 1993 observations
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 14 F4.1 s RAs Right ascension (J2000)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 24 I2 arcsec DEs Declination (J2000)
26- 32 F7.4 --- z Redshift from cross-correlation or
line measurements
34- 39 F6.4 --- e_z rms uncertainty on z
41- 45 F5.2 mag Bjmag ? BJ magnitude or R when BJ not available
46 A1 --- n_Bjmag [R+] R: Rmag in BJmag,
+: possible magnitude problem due to
blending
48 I1 --- Flag [0/5] Classification flag (1)
50- 99 A50 --- Notes Notes
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Note (1): Flag codes:
0: star
1: galaxy member of the cluster
2: galaxy member of the cluster with emission lines
3: emission line galaxy not in the cluster
5: other galaxy. Magnitudes are taken from the SuperCOSMOS Sky Survey
(Hambly et al., 2001MNRAS.326.1279H 2001MNRAS.326.1279H)
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Cluster name (Abell 1451 or RX J1314-25)
12- 14 A3 --- Source Source designation
16- 17 I2 h RAh Source right ascension (J2000)
19- 20 I2 min RAm Source right ascension (J2000)
22- 26 F5.2 s RAs Source right ascension (J2000)
28- 31 F4.2 s e_RAs rms uncertainty on right ascension
34 A1 --- DE- Source declination sign
35- 36 I2 deg DEd Source declination (J2000)
38- 39 I2 arcmin DEm Source declination (J2000)
41- 44 F4.1 arcsec DEs Source declination (J2000)
46- 48 F3.1 arcsec e_DEs rms uncertainty on declination
50- 55 F6.3 GHz Freq Observation Frequency
57- 61 F5.2 mJy Speak ? Peak flux density at frequency Freq
(in mJy/beam)
63- 66 F4.2 mJy e_Speak ? rms uncertainty on Speak (in mJy/beam)
69- 73 F5.2 mJy Sint ? Integrated flux density at frequency Freq
75- 78 F4.2 mJy e_Sint ? rms uncertainty on Sint
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Cluster name (Abell 1451 or RX J1314-25)
12- 14 A3 --- Source Source designation
16- 17 I2 h RAh Source right ascension (J2000)
19- 20 I2 min RAm Source right ascension (J2000)
22- 26 F5.2 s RAs Source right ascension (J2000)
28 A1 --- DE- Source declination sign
29- 30 I2 deg DEd Source declination (J2000)
32- 33 I2 arcmin DEm Source declination (J2000)
35- 39 F5.2 arcsec DEs Source declination (J2000)
40- 44 F5.2 mag Bjmag BJ magnitude
46- 48 F3.1 arcsec Deltar Radius-vector offset between radio and
SuperCOSMOS optical positions
50 I1 --- TClass [1/2] SuperCOSMOS image classification:
1 = galaxy; 2 = star
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History:
From electronic version of the journal
(End) Patricia Bauer [CDS] 08-Oct-2002