TY - JOUR
T1 - PLCK G165.7+67.0
T2 - Analysis of a Massive Lensing Cluster in a Hubble Space Telescope Census of Submillimeter Giant Arcs Selected Using Planck/Herschel
AU - Frye, Brenda L.
AU - Pascale, Massimo
AU - Qin, Yujing
AU - Zitrin, Adi
AU - Diego, José
AU - Walth, Greg
AU - Yan, Haojing
AU - Conselice, Christopher J.
AU - Alpaslan, Mehmet
AU - Bauer, Adam
AU - Busoni, Lorenzo
AU - Coe, Dan
AU - Cohen, Seth H.
AU - Dole, Hervé
AU - Donahue, Megan
AU - Georgiev, Iskren
AU - Jansen, Rolf A.
AU - Limousin, Marceau
AU - Livermore, Rachael
AU - Norman, Dara
AU - Rabien, Sebastian
AU - Windhorst, Rogier A.
N1 - Publisher Copyright:
© 2019. The American Astronomical Society. All rights reserved..
PY - 2019/1/20
Y1 - 2019/1/20
N2 - We present Hubble Space Telescope WFC3-IR imaging in the fields of six apparently bright dusty star-forming galaxies (DSFGs) at z = 2-4 identified by their rest-frame far-infrared colors using the Planck and Herschel space facilities. We detect near-infrared counterparts for all six submillimeter sources, allowing us to undertake strong-lensing analyses. One field in particular stands out for its prominent giant arcs, PLCK G165.7+67.0 (G165). After combining the color and morphological information, we identify 11 sets of image multiplicities in this one field. We construct a strong-lensing model constrained by this lensing evidence, which uncovers a bimodal spatial mass distribution, and from which we measure a mass of (2.6 ±0.11) ×10 14 M o within ∼250 kpc. The bright (S 350 ≈ 750 mJy) DSFG appears as two images: a giant arc with a spatial extent of that is merging with the critical curve, and a lower-magnification counterimage that is detected in our new longer-wavelength ground- and space-based imaging data. Using our ground-based spectroscopy, we calculate a dynamical mass of M o to the same fixed radius, although this value may be inflated relative to the true value if the velocity distribution is enhanced in the line-of-sight direction. We suggest that the bimodal mass taken in combination with the weak X-ray flux and low SZ decrement may be explained as a pre-merger for which the intracluster gas is diluted along the line of sight, while the integrated surface mass density is supercritical to strong-lensing effects.
AB - We present Hubble Space Telescope WFC3-IR imaging in the fields of six apparently bright dusty star-forming galaxies (DSFGs) at z = 2-4 identified by their rest-frame far-infrared colors using the Planck and Herschel space facilities. We detect near-infrared counterparts for all six submillimeter sources, allowing us to undertake strong-lensing analyses. One field in particular stands out for its prominent giant arcs, PLCK G165.7+67.0 (G165). After combining the color and morphological information, we identify 11 sets of image multiplicities in this one field. We construct a strong-lensing model constrained by this lensing evidence, which uncovers a bimodal spatial mass distribution, and from which we measure a mass of (2.6 ±0.11) ×10 14 M o within ∼250 kpc. The bright (S 350 ≈ 750 mJy) DSFG appears as two images: a giant arc with a spatial extent of that is merging with the critical curve, and a lower-magnification counterimage that is detected in our new longer-wavelength ground- and space-based imaging data. Using our ground-based spectroscopy, we calculate a dynamical mass of M o to the same fixed radius, although this value may be inflated relative to the true value if the velocity distribution is enhanced in the line-of-sight direction. We suggest that the bimodal mass taken in combination with the weak X-ray flux and low SZ decrement may be explained as a pre-merger for which the intracluster gas is diluted along the line of sight, while the integrated surface mass density is supercritical to strong-lensing effects.
KW - galaxies: clusters: general
KW - galaxies: fundamental parameters
KW - galaxies: high-redshift
KW - gravitational lensing: strong
KW - submillimeter: galaxies
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U2 - 10.3847/1538-4357/aaeff7
DO - 10.3847/1538-4357/aaeff7
M3 - Article
AN - SCOPUS:85062044537
SN - 0004-637X
VL - 871
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 51
ER -