J/ApJ/797/138 Properties of SMG lens candidates (Calanog+, 2014)
Lens models of Herschel-selected galaxies from high-resolution near-IR
observations.
Calanog J.A., Fu H., Cooray A., Wardlow J., Ma B., Amber S., Baker A.J.,
Baes M., Bock J., Bourne N., Bussmann R.S., Casey C.M., Chapman S.C.,
Clements D.L., Conley A., Dannerbauer H., De Zotti G., Dunne L., Dye S.,
Eales S., Farrah D., Furlanetto C., Harris A.I., Ivison R.J., Kim S.,
Maddox S.J., Magdis G., Messias H., Michalowski M.J., Negrello M.,
Nightingale J., O'Bryan J.M., Oliver S.J., Riechers D., Scott D.,
Serjeant S., Simpson J., Smith M., Timmons N., Thacker C., Valiante E.,
Vieira J.D.
<Astrophys. J., 797, 138 (2014)>
=2014ApJ...797..138C 2014ApJ...797..138C (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing ; Galaxy catalogs ; Redshifts ;
Millimetric/submm sources
Keywords: galaxies: star formation ; gravitational lensing: strong ;
submillimeter: galaxies
Abstract:
We present Keck-Adaptive Optics and Hubble Space Telescope high
resolution near-infrared (IR) imaging for 500µm bright candidate
lensing systems identified by the Herschel Multi-tiered Extragalactic
Survey and Herschel Astrophysical Terahertz Large Area Survey. Out of
87 candidates with near-IR imaging, 15 (∼17%) display clear near-IR
lensing morphologies. We present near-IR lens models to reconstruct
and recover basic rest-frame optical morphological properties of the
background galaxies from 12 new systems. Sources with the largest
near-IR magnification factors also tend to be the most compact,
consistent with the size bias predicted from simulations and previous
lensing models for submillimeter galaxies (SMGs). The rest-frame
optical properties of our sample of Herschel-selected lensed SMGs are
consistent with those of unlensed SMGs, which suggests that the two
populations are similar.
Description:
We have obtained Keck/NIRC2 LGS-AO imaging for Herschel-candidate
lensing systems (observing runs from 2011 to 2013).
Herschel-lensing candidates in the HerMES fields have also been
observed as part of the HST WFC3 Cycle 19 snapshot program (PI: M.
Negrello). All are observed with the F110W filter
(λc=1.15µm), using a four-point parallelogram dither
pattern with point and line spacings of 0.57" and 0.36", respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 108 Summary of high resolution data
table3.dat 63 87 Observed properties of submillimeter galaxies
(SMG) lens candidates
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See also:
VIII/95 : Herschel Multi-tiered Extragalactic Survey (Oliver+, 2012)
J/ApJ/761/140 : Spectroscopy of Herschel-SPIRE galaxies (Casey+, 2012)
J/MNRAS/415/2336 : Herschel-ATLAS Science Demonstration Catalog (Rigby+, 2011)
J/MNRAS/395/1695 : Spitzer MIR spectroscopy of LIRGs (Hernan-Caballero+, 2009)
J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 29 A29 --- Name IAU Name
31- 40 A10 --- SName Short Name
42- 44 A3 --- Filt [J H K K_s K_p] Filter (1)
46 A1 --- --- [=]
48- 50 I3 --- tint [60/355] Exposure time per frame
52 A1 --- --- [x]
54- 55 I2 --- Nf [4/48] Number of independent frames
57- 60 F4.1 mag Depth [24.5/26.8] Depth (AB mag) (2)
61 A1 --- f_Depth [e] Flag on Depth (3)
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Note (1): Filter used, defined as follows:
J = HST F110W,
H = Keck H-band,
K_s = Keck Ks band,
K = Keck K-band,
K_p = Keck Kp-band.
Note (2): 5σ point-source depth calculated using the specifications
outlined in Sections 2.2 and 2.3.
Note (3): A "e" indicates that the depth is calculated using average zero point
(Δmzpt=0.4) due to the absence of a suitable point source in
the frame.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- SName Short Name
12- 14 I3 mJy S250 [0/778] Herschel SPIRE 250µm flux density (1)
16- 18 I3 mJy S350 [47/467] Herschel SPIRE 350µm flux density (1)
20- 22 I3 mJy S500 [24/295] Herschel SPIRE 500µm flux density (1)
24- 27 F4.1 mJy S880 [18.4/90]? SMA 880µm flux density (2)
29- 33 F5.3 --- zs [1.026/4.45]? Background source redshift
35 A1 --- f_zs [c] Flag on zs (3)
37- 44 A8 --- r_zs Reference for zs (4)
46- 50 F5.3 --- zlens [0.16/1.35]? Foreground source redshift
52- 59 A8 --- r_zlens Reference for zlens (4)
60 A1 --- f_zlens [d] Flag on zlens (5)
62- 63 A2 --- Grade Lens grade (6)
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Note (1): Typical errors, which include confusion and instrumental noise on
SPIRE photometry, are 7-10mJy (Smith et al. 2012, J/MNRAS/419/377),
which includes both statistical and confusion noise.
Note (2): S880 is only available for sources that overlap with the sample from
Bussmann et al. (2013ApJ...779...25B 2013ApJ...779...25B). Typical errors for the
Sub-Millimeter Array (SMA) photometry are ∼15% of the measured S880
value.
Note (3): A "c" indicates a single line redshift measurement, using CO
observations.
Note (4): Reference key for the zs and zlens redshifts, defined as
follows:
W13 = Wardlow et al. (2013ApJ...762...59W 2013ApJ...762...59W);
B13 = Bussmann et al. (2013ApJ...779...25B 2013ApJ...779...25B);
R14 = D. A. Riechers et al. (in preparation),
M14 = Messias et al. (2014A&A...568A..92M 2014A&A...568A..92M);
O13 = Omont et al. (2013A&A...551A.115O 2013A&A...551A.115O);
C11 = Cox et al. (2011ApJ...740...63C 2011ApJ...740...63C);
H12 = Harris et al. (2012ApJ...752..152H 2012ApJ...752..152H);
H14 = A. I. Harris et al. (in preparation);
I13 = Ivison et al. (2013ApJ...772..137I 2013ApJ...772..137I);
R11 = Riechers et al. (2011ApJ...733L..12R 2011ApJ...733L..12R);
S11 = Scott et al. (2011ApJ...733...29S 2011ApJ...733...29S);
O08 = Oyaizu et al. (2008ApJ...674..768O 2008ApJ...674..768O);
K13 = M. Krips et al. (in preparation);
G13 = George et al. (2013MNRAS.436L..99G 2013MNRAS.436L..99G);
L14 = R. E. Lupu et al. (in preparation);
B06 = Borys et al. (2006ApJ...636..134B 2006ApJ...636..134B).
Note (5): A "d" indicates the lens redshift is based on Keck/LRIS observations,
H. Fu et al. (in preparation).
Note (6): Lens Grade is the priority value assigned to the lensed candidate,
discussed in Section 3.
Table 2: Grading rubric summary for lensed SMGs
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NIR Lens SMG and Lens SMG only Lens only Neither
Morphology Redshift Redshift Redshift
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Obvious A1 A2 A3 A4
Marginal B1 B2 B3 B4
None C1 C2 C3 C4
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 11-May-2016