J/ApJS/213/35 SHELS: complete galaxy redshift survey for R≤20.6 (Geller+, 2014)
SHELS: a complete galaxy redshift survey with R≤20.6.
Geller M.J., Hwang H.S., Fabricant D.G., Kurtz M.J., Dell'Antonio I.P.,
Zahid H.J.
<Astrophys. J. Suppl. Ser., 213, 35 (2014)>
=2014ApJS..213...35G 2014ApJS..213...35G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Galaxies, spectra ; Redshifts ;
Photometry, RI ; Abundances ; Surveys
Keywords: cosmology: observations; galaxies: abundances;
galaxies: distances and redshifts; galaxies: evolution;
large-scale structure of universe; surveys
Abstract:
The SHELS (Smithsonian Hectospec Lensing Survey) is a complete
redshift survey covering two well-separated fields (F1 and F2) of the
Deep Lens Survey to a limiting R=20.6. Here we describe the redshift
survey of the F2 field (RAJ2000=09h19m32.4s and
DEJ2000=+30°00'00"). The survey includes 16294 new redshifts
measured with the Hectospec on the MMT. The resulting survey of the
4deg2 F2 field is 95% complete to R=20.6, currently the densest
survey to this magnitude limit. The median survey redshift is z=0.3;
the survey provides a view of structure in the range 0.1≲z≲0.6. An
animation displays the large-scale structure in the survey region. We
provide a redshift, spectral index Dn4000, and stellar mass for each
galaxy in the survey. We also provide a metallicity for each galaxy in
the range 0.2<z<0.38. To demonstrate potential applications of the
survey, we examine the behavior of the index Dn4000 as a function of
galaxy luminosity, stellar mass, and redshift. The known evolutionary
and stellar mass dependent properties of the galaxy population are
cleanly evident in the data. We also show that the mass-metallicity
relation previously determined from these data is robust to the
analysis approach.
Description:
The SHELS (Smithsonian Hectospec Lensing Survey) redshift survey
covers two of the five fields of the ambitious DLS (Deep Lens Survey;
Wittman et al., 2006ApJ...643..128W 2006ApJ...643..128W). For the F2 field, we base our
redshift survey on the DLS photometry. The DLS photometric data, with
an effective exposure time of 14500s on the Mayall 4m in <0.9" seeing,
reach a 1σ limit for source detection in R of 28.7mag/arcsec2.
We acquired spectra for the objects with the Hectospec on the MMT from
2004 April 13 to 2009 December 21. The SHELS spectra cover the
wavelength range 3700-9100Å with a resolution of ∼5Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 33 778 *List of masked regions and radii
table3.dat 105 13325 SHELS redshifts with R<20.6
table4.dat 105 2994 SHELS redshifts with R>20.6
table5.dat 55 703 Objects without redshifts at R<20.6 outside
masked regions
table6.dat 160 1417 The spectra data in Figure 14 (SHELS F2
rest-frame spectra summed in bins of 0.1 in z
and 0.5dex in stellar mass)
table7.dat 66 4697 The spectra data in Figure 15 (summed spectra
for star-forming emission-line galaxies with
0.2<z<0.38 binned in stellar mass)
mass.dat 24 34 Mass and redshift ranges used for summed spectra;
table added by CDS
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Note on table1.dat: Figure 1 shows the distribution of the masked regions
superimposed on the survey region and the cumulative area they cover as a
function of their radii. The total area of the DLS F2 field is 4.19deg2.
The masked regions cover 0.21deg2, or about 5% of the area. The complete
redshift survey covers the unmasked region of 3.98deg2.
See section 2.1 for further explanations.
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See also:
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)
VII/203 : Las Campanas Redshift Survey (Shectman+ 1996)
VII/225 : The Canada-France Redshift Survey (CFRS) (Lilly+, 1995)
J/ApJS/200/8 : AGES: the AGN and Galaxy Evolution Survey (Kochanek+, 2012)
J/ApJ/758/25 : Optical properties of WISE galaxies (Hwang+, 2012)
J/AJ/143/102 : SHELS galaxies with 0.02<z<0.1 (Geller+, 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)
J/AJ/116/1 : Southern Sky Redshift Survey (Da Costa+, 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/778] Running sequence number
5- 15 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
17- 27 F11.7 deg DEdeg Declination in decimal degrees (J2000)
29- 33 F5.1 arcsec Rad [0.3/132] Mask radius
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- SHELS Identification (DDD.ddddddd+DD.ddddddd)
24- 42 A19 --- SDSS SDSS-DR10 Object identification (G1)
44- 49 F6.3 mag Rmag [12.5/22.6] Deep Lens Survey (DLS)
R-band magnitude
51- 55 F5.3 mag e_Rmag [0/9.99] Uncertainty in Rmag
57- 63 F7.5 --- z [0.005/4.2] Redshift
65- 71 F7.5 --- e_z [0/0.002] Uncertainty in z
73 I1 --- r_z [1/2]? Source of z (1=this work;
only for table 3) (1)
75 I1 --- Mask [0/1] Mask flag (0=outside masked regions) (2)
77- 81 F5.2 --- Dn4000 ?=-9.99 Dn4000 break (3)
83- 87 F5.2 [Msun] Mstar [5.4/12.2]?=-9.99 log stellar mass
89- 93 F5.2 [Msun] E_Mstar [0.03/0.8]?=-9.99 Superior uncertainty in Mstar
95- 99 F5.2 [Msun] e_Mstar ?=-9.99 Inferior uncertainty in Mstar
101-105 F5.2 --- Metal [8.3/9.3]?=-9.99 Oxygen Abundance
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Note (1): Reference of redshifts for table 3 as follows:
1 = This study;
2 = SDSS.
For table 4, all the redshifts are from MMT (column left blank).
Note (2): Flag as follows:
0 = Outside masked regions;
1 = Inside masked regions.
Note (3): We define Dn4000 as the ratio of flux (in fν units) in the
4000-4100Å and 3850-3950Å bands. Dn4000 is a measure of the
amplitude of the 4000Å break in the spectrum and provides a coarse
estimate of the aggregate population age (although entwined with the
metallicity). See section 2.3 for the discussion.
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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- 22 A22 --- SHELS Identification (DDD.ddddddd+DD.ddddddd)
24- 42 A19 --- SDSS SDSS object identification (G1)
44- 49 F6.3 mag Rmag [17.6/20.6] DLS R-band magnitude
51- 55 F5.3 mag e_Rmag [0.001/1] Uncertainty in Rmag
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 6 F6.1 0.1nm lambda [3600/5299.2] Rest-frame wavelength; Angstroms
8- 13 F6.2 --- FluxS1z2 Normalized flux of summed spectrum (1)
15- 20 F6.2 --- FluxS1z3 Normalized flux of summed spectrum (1)
22- 27 F6.2 --- FluxS1z4 Normalized flux of summed spectrum (1)
29- 34 F6.2 --- FluxS1z5 Normalized flux of summed spectrum (1)
36- 41 F6.2 --- FluxS2z1 Normalized flux of summed spectrum (1)
43- 48 F6.2 --- FluxS2z2 Normalized flux of summed spectrum (1)
50- 55 F6.2 --- FluxS2z3 Normalized flux of summed spectrum (1)
57- 62 F6.2 --- FluxS2z4 Normalized flux of summed spectrum (1)
64- 69 F6.2 --- FluxS2z5 Normalized flux of summed spectrum (1)
71- 76 F6.2 --- FluxS3z1 Normalized flux of summed spectrum (1)
78- 83 F6.2 --- FluxS3z2 Normalized flux of summed spectrum (1)
85- 90 F6.2 --- FluxS3z3 Normalized flux of summed spectrum (1)
92- 97 F6.2 --- FluxS3z4 Normalized flux of summed spectrum (1)
99-104 F6.2 --- FluxS3z5 Normalized flux of summed spectrum (1)
106-111 F6.2 --- FluxS4z1 Normalized flux of summed spectrum (1)
113-118 F6.2 --- FluxS4z2 Normalized flux of summed spectrum (1)
120-125 F6.2 --- FluxS4z3 Normalized flux of summed spectrum (1)
127-132 F6.2 --- FluxS4z4 Normalized flux of summed spectrum (1)
134-139 F6.2 --- FluxS4z5 Normalized flux of summed spectrum (1)
141-146 F6.2 --- FluxS5z1 Normalized flux of summed spectrum (1)
148-153 F6.2 --- FluxS5z2 Normalized flux of summed spectrum (1)
155-160 F6.2 --- FluxS5z3 Normalized flux of summed spectrum (1)
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Note (1): galaxies in a specific mass and redshift range where the number
after "S" gives the mass range code:
1 = log(Mstar/Msun)=11.00-11.50;
2 = log(Mstar/Msun)=10.50-11.00;
3 = log(Mstar/Msun)=10.00-10.50;
4 = log(Mstar/Msun)= 9.50-10.00;
5 = log(Mstar/Msun)= 9.00- 9.50;
and the number after "z" gives the redshift range code:
1 = z=0.1-0.2;
2 = z=0.2-0.3;
3 = z=0.3-0.4;
4 = z=0.4-0.5;
5 = z=0.5-0.6.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 F6.1 0.1nm lambda [3600.2/6699.6] Rest-frame wavelength
8- 12 F5.3 --- FluxS1 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=9.08-9.32
14- 18 F5.3 --- FluxS2 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=9.32-9.47
20- 24 F5.3 --- FluxS3 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=9.47-9.62
26- 30 F5.3 --- FluxS4 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=9.62-9.75
32- 36 F5.3 --- FluxS5 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=9.75-9.86
38- 42 F5.3 --- FluxS6 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=9.87-10.00
44- 48 F5.3 --- FluxS7 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=10.00-10.13
50- 54 F5.3 --- FluxS8 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=10.13-10.29
56- 60 F5.3 --- FluxS9 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=10.29-10.52
62- 66 F5.3 --- FluxS10 Normalized flux of summed spectrum within
mass range: log(Mstar/Msun)=10.52-11.35
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Byte-by-byte Description of file: mass.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Spec Internal ID for specific mass (and redshift)
range
6- 10 F5.2 [Msun] Mass1 [9/11] Lower mass range
12- 16 F5.2 [Msun] Mass2 [9.3/11.5] Upper mass range
18- 20 F3.1 --- z1 [0.1/0.5]? Lower redshift range
22- 24 F3.1 --- z2 [0.2/0.6]? Upper redshift range
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Global notes:
Note (G1): SDSS ObjID from DR10. If DR10 ObjID is not available, we present
SDSS DR7 ObjID that starts with "58".
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History:
From electronic version of the journal
02-Dec-2015: Insert into VizieR
28-Jun-2016: Mix-up in table 4 corrected ("r_z" does not exist in this table;
and column Mask was inverted with it).
References:
Geller et al. F1 field. 2016ApJS..224...11G 2016ApJS..224...11G Cat. J/ApJS/224/11
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 15-Sep-2014