J/ApJS/224/11 SHELS: redshift survey of the F1 DLS field (Geller+, 2016)
SHELS: complete redshift surveys of two widely separated fields.
Geller M.J., Hwang H.S., Dell'Antonio I.P., Zahid H.J., Kurtz M.J.,
Fabricant D.G.
<Astrophys. J. Suppl. Ser., 224, 11 (2016)>
=2016ApJS..224...11G 2016ApJS..224...11G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Redshifts ; Surveys ; Photometry, RI
Keywords: cosmology: observations; galaxies: abundances;
galaxies: distances and redshifts; galaxies: evolution;
large-scale structure of universe; surveys
Abstract:
The Smithsonian Hectospec Lensing Survey (SHELS) is a complete
redshift survey covering two well-separated fields (F1 and F2) of the
Deep Lens Survey (DLS). Both fields are more than 94% complete to a
Galactic extinction corrected R0=20.2. Here, we describe the
redshift survey of the F1 field centered at RA=00:53:25.3 and
DEC=12:33:55 (J2000); like F2, the F1 field covers ∼4deg2. The
redshift survey of the F1 field includes 9426 new galaxy redshifts
measured with Hectospec on the MMT (published here). As a guide to
future uses of the combined survey, we compare the mass metallicity
relation and the distributions of Dn4000 as a function of stellar
mass and redshift for the two fields. The mass-metallicity relations
differ by an insignificant 1.6σ. For galaxies in the stellar
mass range 1010-1011M☉, the increase in the star-forming
fraction with redshift is remarkably similar in the two fields. The
seemingly surprising 31%-38% difference in the overall galaxy counts
in F1 and F2 is probably consistent with the expected cosmic variance
given the subtleties of the relative systematics in the two surveys.
We also review the DLS cluster detections in the two fields: poorer
photometric data for F1 precluded secure detection of the single
massive cluster at z=0.35 that we find in SHELS. Taken together, the
two fields include 16055 redshifts for galaxies with R0≤20.2 and
20754 redshifts for galaxies with R≤20.6. These dense surveys in two
well-separated fields provide a basis for future investigations of
galaxy properties and large-scale structure.
Description:
The Smithsonian Hectospec Lensing Survey (SHELS) redshift survey
covers two 4deg2 fields originally selected as part of the Deep Lens
Survey (DLS; Wittman et al. 2006ApJ...643..128W 2006ApJ...643..128W).
We used the 300-fiber Hectospec instrument on the MMT to acquire
spectroscopy for galaxy candidates typically brighter than R=20.6. We
observed the F1 field (centered at RA=00:53:25.3 and DEC=12:33:55
(J2000)) in queue mode during dark runs in four periods: 2005 October
24-28; 2006 October 17-November 22; 2012 October 10-December 10; 2014
September 26-November 28. The wavelength range covered by Hectospec in
the observer's frame is 3700-9100Å with a resolution of ∼5Å. See
section 2.2 for further explanations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 7002 SHELS redshifts with mR,0≤20.2
table2.dat 105 2859 SHELS redshifts with mR,0>20.2
table3.dat 52 422 Objects without redshifts at mR,0≤20.2
table4.dat 73 413 SHELS redshifts with z<0.0015
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See also:
III/269 : VIMOS VLT Deep Survey (VVDS) (Le Fevre+, 2013)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)
J/MNRAS/452/2087 : Galaxy And Mass Assembly (GAMA): DR2 (Liske+, 2015)
J/ApJS/213/35 : SHELS: galaxy redshift survey for R≤20.6 (Geller+, 2014)
J/ApJ/758/25 : Optical properties of WISE galaxies (Hwang+, 2012)
J/ApJS/200/8 : AGES: the AGN and Galaxy Evolution Survey (Kochanek+, 2012)
J/ApJ/750/168 : Redshift survey in the Subaru GTO2deg2 field (Kurtz+, 2012)
J/AJ/143/102 : SHELS galaxies with 0.02<z<0.1 (Geller+, 2012)
J/ApJ/748/56 : K2-detected clusters in the CFHTLS-W1 field (Shan+, 2012)
J/AJ/139/1857 : Sample of major galaxy pairs at z=0.08-0.38 (Woods+, 2010)
J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)
J/A+A/437/883 : K20 survey: spectroscopic catalogue (Mignoli+, 2005)
J/PASP/117/227 : Properties of 101 galaxies from the NFGS (Kewley+, 2005)
J/ApJ/617/240 : Oxygen abundances in the GOODS-North field (Kobulnicky+, 2004)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- ID Identification (DD.dddddd+DD.dddddd)
21- 39 A19 --- objID SDSS Object identification
41- 46 F6.3 mag Rmag [13.8/22.8] DLS R-band magnitude;
Galactic extinction corrected
48- 52 F5.3 mag e_Rmag [0/10] Uncertainty in Rmag
54- 60 F7.5 --- z [0.002/4.5] Spectroscopic redshift
62- 69 F8.5 --- e_z [0/0.002]?=-9.99 Uncertainty in z
71 I1 --- r_z Reference for z (1)
73 I1 --- r_Rmag Reference for Rmag (1=DLS or 2=SDSS)
75 I1 --- Ext? Point source flag (0=extended source or
1=point source)
77- 81 F5.2 --- Dn4000 [0.03/3]?=-9.99 The Dn4000 index value (2)
83- 87 F5.2 [Msun] logM* [5.6/12.2]?=-9.99 log stellar mass
89- 93 F5.2 [Msun] E_logM* [0.03/0.6]?=-9.99 Superior uncertainty in logM*
95- 99 F5.2 [Msun] e_logM* [0.03/0.9]?=-9.99 Inferior uncertainty in logM*
101-105 F5.2 [Sun] O/H [0.8/14.5]?=-9.99 Oxygen Abundance; 12+log(O/H)
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Note (1): Reference as follows:
1 = This study (6944 sources in table 1 + 2695 sources in table 2;
2 = SDSS;
3 = NED.
Note (2): The computation of Dn4000 is based on the procedures described in
Fabricant et al. (2008PASP..120.1222F 2008PASP..120.1222F) following the definition of
Balogh et al. (1999ApJ...527...54B 1999ApJ...527...54B). See also Paper I (Geller+,
2014, J/ApJS/213/35). See section 2.2.
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- ID Identification (DD.dddddd+DD.dddddd)
21- 39 A19 --- objID SDSS Object identification (1)
41- 46 F6.3 mag Rmag [17.9/20.2] DLS R-band magnitude;
Galactic extinction corrected
48- 52 F5.3 mag e_Rmag [0/3] Uncertainty in Rmag
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Note (1): A blank indicates that the object is in the DLS catalog but
absent from the SDSS. There are 20 of these objects in the catalog.
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- ID Identification (DD.dddddd+DD.dddddd)
21- 39 A19 --- objID SDSS Object identification
41- 46 F6.3 mag Rmag [15.7/21.6] DLS R-band magnitude;
Galactic extinction corrected
48- 52 F5.3 mag e_Rmag [0/2.1]?=9.99 Uncertainty in Rmag
54- 61 F8.5 --- z [-0.002/0.002] Spectroscopic redshift
63- 69 F7.5 --- e_z [0/0.001] Uncertainty in z
71 I1 --- r_z Reference for z (1=this study (360 sources);
or 2=SDSS)
73 I1 --- r_Rmag Reference for Rmag (1=DLS or 2=SDSS)
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History:
From electronic version of the journal
References:
Geller et al. F2 field 2014ApJS..213...35G 2014ApJS..213...35G Cat. J/ApJS/213/35
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Jul-2016