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 - Funding Information:
We appreciate helpful discussions with Eiichi Egami, Xiaohui Fan, Dan Marrone, Ann Zabludoff, and Scott Tremaine, and we especially thank the anonymous referee for comments that significantly improved this paper. Support for program HST GO-14223 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. J.M.D.acknowledges the support of project AYA2015-64508-P (MINECO/FEDER, UE). R.A.W.was funded by NASA JWST Interdisciplinary Scientist grants NAG5-12460, NNX14AN10G, and 80GNSSC18K0200 from NASA Goddard Space Flight Center. M.P. and A.B. were funded by a UA/NASA Space Grant for Undergraduate Research. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. This work makes use of the Large Binocular Telescope, which is an international collaboration among institutions in the United States, Italy, and Germany. We would like to thank the staff at Gemini-North and at the MMT for performing the observations in service mode.
Funding Information:
IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.
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 -