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J/A+A/429/101       Stellar populations of CL 0048-2942      (Serote+, 2005)

The intermediate-redshift galaxy cluster CL 0048-2942. Stellar populations. Serote Roos M., Lobo C., Durret F., Iovino A., Marquez I. <Astron. Astrophys., 429, 101-114 (2005)> =2005A&A...429..101S
ADC_Keywords: Clusters, galaxy ; Redshifts ; Equivalent widths Keywords: galaxies: clusters: individual: CL 0048-2942 - galaxies: clusters: general - galaxies: distances and redshifts - galaxies: stellar content Abstract: We present a detailed study of the cluster CL 0048-2942, located at z∼0.64, based on a photometric and spectroscopic catalogue of 54 galaxies in a 5x5arcmin2 region centred in that cluster. Of these, 23 galaxies were found to belong to the cluster. Based on this sample, the line-of-sight velocity dispersion of the cluster is approximately 680±140km/s. Description: CL 0048-2942 was identified in optical images of the ESO Imaging Survey (Nonino et al., 1999A&AS..137...51N) by running a matched-filter detection algorithm (Lobo et al., 2000A&A...360..896L) on the I-band of that data set. Images of the cluster field (each one covering square arcmin) were obtained through the B, V, R and I Bessel-Cousins filters at the La Silla ESO 3.6m telescope with the EFOSC2 camera. Standard data reduction was performed with IRAF. Multi-object spectroscopy was performed during two runs at the VLT: a first campaign of two nights in September 1999 with the MOS unit of FORS1 (VLT UT1) provided partial coverage of selected objects in the cluster candidate field; further data were gathered during the second campaign, this time in service mode during the first semester of 2000, with the MOS unit of FORS2 (VLT UT2). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 83 54 Catalogue for all galaxies with measured redshift in the field of CL 0048-2942 table4.dat 46 63 The 63 wavelength intervals defined for measuring the equivalent widths table56.dat 43 44 Stellar populations for the cluster galaxies and the field galaxies in terms of the six stellar components table8.dat 55 54 Classifications for all 54 galaxies having a redshift measure
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [SLD2005] Galaxy sequential number 5- 6 I2 h RAh Right ascension (J2000.0) 8- 9 I2 min RAm Right ascension (J2000.0) 11- 16 F6.3 s RAs Right ascension (J2000.0) 18 A1 --- DE- Declination sign (J2000.0) 19- 20 I2 deg DEd Declination (J2000.0) 22- 23 I2 arcmin DEm Declination (J2000.0) 25- 29 F5.2 arcsec DEs Declination (J2000.0) 31- 36 F6.4 --- zabs ? Absoprtion line redshift 38- 43 F6.4 --- e_zabs ? rms uncertainty on zabs 45- 48 F4.2 --- R ? Tonry & Davis parameter (1979AJ.....84.1511T) 50- 55 F6.4 --- zem ? Emission line redshift 57- 62 F6.4 --- e_zem ? rms uncertainty on zem 64 I1 --- o_zem ? Number of emission lines used to estimate the emission line redshift 66- 72 F7.4 mag Icmag ? Cousins I-band aperture magnitude within a 4.5 arcsec aperture 74- 79 F6.4 mag e_Icmag ? rms uncertainty on Icmag 81- 83 A3 --- Flag [bto+ ] Alert flags (1)
Note (1): Alert flags as follows: b = blended objects in photometry though position is accurate in VLT image o = objects outside the 3.6m f.o.v. or at the image boundary t = objects with lower signal-to-noise photometry (as can be deduced from the corresponding magnitude errors) due to the fact that only one of the several exposures obtained at the 3.6m telescope covered the region occupied by the object in question; for these objects, the magnitude obtained is a rough estimate.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 29 A29 --- Lines Line identifications 31- 36 F6.1 0.1nm lambdac Central wavelength 38- 41 I4 0.1nm lambdal Wavelength interval, lower limit 42 A1 --- --- [-] 43- 46 I4 0.1nm lambdau Wavelength interval, upper limit
Byte-by-byte Description of file: table56.dat
Bytes Format Units Label Explanations
1 A1 --- CF [CF] CL0048 (C) or field (F) galaxies 3- 5 I3 --- [SLD2005] Galaxy sequential number 7- 8 A2 --- Pos Relative position flag, for cluster stars (1) 10- 13 F4.2 --- z ? Redshift for star fields 15- 16 I2 % Vyoung ? Main sequence (luminosity class V) young population contribution (2) 18- 19 I2 % Vint ? Main sequence (luminosity class V) intermediate population contribution (2) 21- 22 I2 % Vold ? Main sequence (luminosity class V) old population contribution (2) 24- 25 I2 % IIIyoung ? Giant (luminosity class III) young population contribution (2) 27- 28 I2 % IIIint ? Giant (luminosity class III) intermediate population contribution (2) 30- 31 I2 % Iyoung ? Young supergiant (luminosity class I) population contribution (2) 33- 35 I3 kpc Dist Distance 37- 38 I2 --- Nf Number of features used for each solution found 40- 43 F4.2 mag E(B-V) Reddening
Note (1): The relative position of each galaxy within the cluster (see Fig. 6) is indicated as follows: ct = stands for centre or core it = denotes the intermediate region p = identifies peripheral galaxies Note (2): All values are in percentage and give the contribution of each population component to the total light at λref=4200Å.
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1 A1 --- CF [CF] clusters (C) or field (F) galaxies 3- 5 I3 --- [SLD2005] Galaxy sequential number 7- 10 F4.1 0.1nm EW[OII] ?=- [OII] equivalent width 12- 15 F4.1 0.1nm EWHd ?=- Hδ equivalent width 17- 20 F4.1 0.1nm EWHg ?=- Hγ equivalent width 22- 26 F5.1 0.1nm EWHb ?=- Hβ equivalent width 28- 31 F4.2 0.1nm EW(Hd+Hg)/2 ?=- Hδ+Hγ)/2 equivalent width 34- 36 F3.1 0.1nm EW(Hd+Hg+Hb)/3 ?=- Hδ+Hγ+Hβ)/3 equivalent width 39- 43 A5 --- Class Spectral classification (1) 46- 47 A2 --- Pos Relative position of each cluster galaxy within the cluster as in Fig. 6 (2) 52- 55 A4 --- MClass Morphological classification attributed by La Barbera et al.. 2003A&A...399..899L (3)
Note (1): For three of the objects (#396, #399, #908), since the two methods described do not give the same result, we display both of them. Note (2): Relative positions code as follows: ct = centre or core it = intermediate region p = peripheral galaxies Note (3): Morphological classification as follows: sph = spheroidal galaxies disks = disk galaxies
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Dec-2005
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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