J/other/RAA/11.245 Galaxies in the field of RX J0054.0-2823 (Giraud+, 2011)
Low-ionization galaxies and evolution in a pilot survey up to z = 1.
Giraud E., Gu Q.-S., Melnick J., Quintana H., Selman F., Toledo I.,
Zelaya P.
<Res. Astron. Astrophys., 11, 245-270 (2011)>
=2011RAA....11..245G 2011RAA....11..245G
ADC_Keywords: Galaxy catalogs ; Redshifts ; Radial velocities ; Spectroscopy
Keywords: cosmology: observations - galaxies: evolution -
large scale structures - evolution - RX J0054.0-2823
Abstract:
We present galactic spectroscopic data from a pencil beam of
10.75'x7.5' centered on the X-ray cluster RXJ0054.0-2823 at z=0.29. We
study the spectral evolution of galaxies from z=1 down to the cluster
redshift in a magnitude-limited sample at R≤23, for which the
statistical properties of the sample are well understood. We divide
emission-line galaxies into star-forming galaxies, Low Ionization
Nuclear Emission line Regions (LINERs), and Seyferts by using
emission-line ratios of [OII],Hβ, and [OIII], and derive stellar
fractions from population synthesis models. We focus our analysis on
absorption and low-ionization galaxies.
Description:
The observations (ESO program 078A-0456(A)) were obtained with the
FORS2 instrument at the Cassegrain focus of the VLT UT1 telescope in
multi-object spectroscopy mode with the exchangeable mask unit (MXU).
They were acquired in service observing and were spread over the two
periods, 78 and 80, to satisfy our observing requirements.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 143 676 Properties of the galaxies in the field of
RX J0054.0-2823
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID Running number of observed object (1)
5 A1 --- m_ID [b] Multiplicity index on ID
7- 15 F9.6 deg RAdeg Right ascension in decimal degrees (J2000)
17- 26 F10.6 deg DEdeg Declination in decimal degrees (J2000)
28- 38 E11.6 --- z Redshift (2)
39 A1 --- u_z Uncertainty flag on z
42- 46 F5.2 mag Rmag ?=- Petrosian magnitude in R
48- 54 I7 km/s RV ?=- Radial velocity derived from
cross-correlation
56- 59 I4 km/s e_RV ?=- rms uncertainty on RV (3)
61- 64 F4.1 --- RT ?=- Tonry parameter (3)
66 I1 --- Nsp Number of independent spectra
68-143 A76 --- Lines Lines used in determining z (4)
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Note (1): Galaxies with ID>1000 have z and V from Faure et al.,
2007A&A...463..833F 2007A&A...463..833F.
Note (2): Galaxies with z only have their redshift measured from the lines
identified visually in the last column. Galaxies with z and V are also
measured by cross-correlation.
Note (3): The velocity errors and Tonry parameters are products of the
cross-correlation.
Note (4): The rest frame wavelengths of the lines used are:
AlIII = 1855-1863Å
FeII24 = 2344.2Å, 2374.5Å, 2382.8Å
FeII26 = 2586.5Å, 2600.2Å
MgII = 2796.4Å, 2803Å
AlII = 3584ÅOII 3728.2Å
H10 = 3797.9Å
H9 (+MgI) = 3835Å
NeIII = 3869Å
H8 = 3889.1Å
K = 3933.7Å
H (+Hε) = 3968.5Å
Hδ = 4101.7Å
G = 4303Å
Hγ = 4340.5Å
Fe43 = 4383Å
Ca44 = 4455Å
Fe45 = 4531Å
Hβ = 4861.3Å
OIII = 4958.9Å, 5006.8Å
Mgb = 5175Å
E = 5270Å
NaD = 5892Å
Hα = 6563Å
NII = 6584Å
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Acknowledgements:
Edmond Giraud, Edmond.GIRAUD(at)lpta.in2p3.fr
(End) Patricia Vannier [CDS] 30-Jan-2012