J/A+A/578/A30 Emission-line galaxies in ZwCl0024.0+1652 (Sanchez-Portal+, 2015)
GLACE survey: OSIRIS/GTC tuneable filter Hα imaging of the rich galaxy
cluster Zw Cl0024.0+1652 at z=0.395.
I. Survey presentation, TF data reduction techniques, and catalogue.
Sanchez-portal M., Pintos-Castro I., Perez-Martinez R., Cepa J.,
Perez Garcia A.M., Dominguez-Sanchez H., Bongiovanni A., Serra A.L.,
Alfaro E., Altieri B., Aragon-Salamanca A., Balkowski C., Biviano A.,
Bremer M., Castander F., Castaneda H., Castro-Rodriguez N.,
Chies-santos A.L., Coia D., Diaferio A., Duc P.A., Ederoclite A., Geach J.,
Gonzalez-Serrano I., Haines C.P., Mcbreen B., Metcalfe L., Oteo I.,
Perez-Fournon I., Poggianti B., Polednikova J., Ramon-Perez M.,
Rodriguez-Espinosa J.M., Santos J.S., Smail I., Smith G.P., Temporin S.,
Valtchanov I.
<Astron. Astrophys., 578, A30-30 (2015)>
=2015A&A...578A..30S 2015A&A...578A..30S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Active gal. nuclei ; Photometry, H-alpha ;
Spectroscopy
Keywords: galaxies: clusters: individual: ZwCl0024.0+1652 -
galaxies: photometry - galaxies: star formation - galaxies: active
Abstract:
The cores of clusters at 0≲z≲1 are dominated by quiescent early-type
galaxies, whereas the field is dominated by star-forming late-type
galaxies. Clusters grow through the accretion of galaxies and groups
from the surrounding field, which implies that galaxy properties,
notably the star formation ability, are altered as they fall into
overdense regions. The critical issues for understanding this
evolution are how the truncation of star formation is connected to the
morphological transformation and what physical mechanism is
responsible for these changes. The GaLAxy Cluster Evolution Survey
(GLACE) is conducting a thorough study of the variations in galaxy
properties (star formation, AGN activity, and morphology) as a
function of environment in a representative and well-studied sample of
clusters. To address these questions, the GLACE survey is making a
deep panoramic survey of emission line galaxies (ELG), mapping a set
of optical lines ([OII], [OIII], Hβ and Hα/[NII] when
possible) in several galaxy clusters at z∼0.40, 0.63, and 0.86. Using
the tunable filters (TF) of the OSIRIS instrument at the 10.4m GTC
telescope, the GLACE survey applies the technique of TF tomography:
for each line, a set of images are taken through the OSIRIS TF, each
image tuned at a different wavelength (equally spaced), to cover a
rest frame velocity range of several thousand km/s centred on the mean
cluster redshift, and scanned for the full TF field of view of an
8arcmin diameter. Here we present the first results of the GLACE
project, targeting the Hα/[NII] lines in the
intermediate-redshift cluster ZwCl0024.0+1652 at z=0.395. Two
pointings have been performed that cover ∼2*rvir.
Description:
Two OSIRIS/GTC pointings using the red TF were planned and executed
towards Cl0024. The first one (carried out in GTC semesters 09B, 10A,
and 13B; hereafter referred to as "centre position") targeted the
Hα/[NII], Hα and [OIII] lines. The second pointing
(hereafter referred to as "offset position") was carried out in
semesters 10B and 13B, and it targeted the same emission lines.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 70 174 Catalogue of unique ELGs of Cl0024
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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- 6 A6 --- ID Name, NNNN_C or NNNN_0 (1)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 31 F4.1 arcsec DEs Declination (J2000)
33- 38 F6.4 --- z [0.37/0.43] Redshift
40- 42 I3 10-20W/m2 FHa [4/114] Hα flux (10-17erg/cm2/s)
44- 45 I2 10-20W/m2 e_FHa [1/30] rms uncertainty on FHa
47- 49 I3 10-20W/m2 F[NII] [1/66]?=- [NII] flux (10-17erg/cm2/s)
51- 52 I2 10-20W/m2 e_F[NII] [1/38]?=- rms uncertainty on F[NII]
54- 58 F5.1 0.1nm EWHa [6/426] Hα equivalent width
60- 64 F5.1 0.1nm EWHaN [11/438]?=- Hα+[NII] equivalent width
66- 70 A5 --- Class Galaxy type: "SF" (star-forming),
"BLAGN" (Broad-line), or "NLAGN" (narrow-line)
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Note (1): The identifiers with C correspond to sources gathered from the
central pointing, while those with O correspond to sources gathered from
the offset one.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Jul-2015