A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243
We present high-spatial resolution imaging obtained with the Submillimeter Array (SMA) at 880 μm and the Keck adaptive optics (AO) system at the K S-band of a gravitationally lensed submillimeter galaxy (SMG) at z = 4.243 discovered in the Herschel Astrophysical Terahertz Large Area Survey. The SMA...
| Những tác giả chính: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
Institute of Physics Publishing
2012
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| _version_ | 1826264270094991360 |
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| author | Bussmann, R Gurwell, M Fu, H Smith, D Dye, S Auld, R Baes, M Baker, A Bonfield, D Cava, A Clements, D Cooray, A Coppin, K Dannerbauer, H Dariush, A De Zotti, G Dunne, L Eales, S Fritz, J Hopwood, R Ibar, E Ivison, R Jarvis, M Kim, S Leeuw, L |
| author_facet | Bussmann, R Gurwell, M Fu, H Smith, D Dye, S Auld, R Baes, M Baker, A Bonfield, D Cava, A Clements, D Cooray, A Coppin, K Dannerbauer, H Dariush, A De Zotti, G Dunne, L Eales, S Fritz, J Hopwood, R Ibar, E Ivison, R Jarvis, M Kim, S Leeuw, L |
| author_sort | Bussmann, R |
| collection | OXFORD |
| description | We present high-spatial resolution imaging obtained with the Submillimeter Array (SMA) at 880 μm and the Keck adaptive optics (AO) system at the K S-band of a gravitationally lensed submillimeter galaxy (SMG) at z = 4.243 discovered in the Herschel Astrophysical Terahertz Large Area Survey. The SMA data (angular resolution 06) resolve the dust emission into multiple lensed images, while the Keck AO K S-band data (angular resolution 01) resolve the lens into a pair of galaxies separated by 03. We present an optical spectrum of the foreground lens obtained with the Gemini-South telescope that provides a lens redshift of z lens = 0.595 ± 0.005. We develop and apply a new lens modeling technique in the visibility plane that shows that the SMG is magnified by a factor of μ = 4.1 ± 0.2 and has an intrinsic infrared (IR) luminosity of L IR = (2.1 ± 0.2) × 1013 L ⊙. We measure a half-light radius of the background source of r s = 4.4 ± 0.5kpc which implies an IR luminosity surface density of ΣIR = (3.4 ± 0.9) × 1011 L ⊙kpc-2, a value that is typical of z > 2 SMGs but significantly lower than IR luminous galaxies at z 0. The two lens galaxies are compact (r lens 0.9kpc) early-types with Einstein radii of θE1 = 0.57 ± 0.01 and θE2 = 0.40 ± 0.01 that imply masses of M lens1 = (7.4 ± 0.5) × 1010 M ⊙ and M lens2 = (3.7 ± 0.3) × 10 10 M ⊙. The two lensing galaxies are likely about to undergo a dissipationless merger, and the mass and size of the resultant system should be similar to other early-type galaxies at z 0.6. This work highlights the importance of high spatial resolution imaging in developing models of strongly lensed galaxies discovered by Herschel. © 2012. The American Astronomical Society. All rights reserved. |
| first_indexed | 2024-03-06T20:05:03Z |
| format | Journal article |
| id | oxford-uuid:28a245c7-9ef2-49da-81d0-7459db0af73b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:05:03Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:28a245c7-9ef2-49da-81d0-7459db0af73b2022-03-26T12:14:06ZA DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:28a245c7-9ef2-49da-81d0-7459db0af73bEnglishSymplectic Elements at OxfordInstitute of Physics Publishing2012Bussmann, RGurwell, MFu, HSmith, DDye, SAuld, RBaes, MBaker, ABonfield, DCava, AClements, DCooray, ACoppin, KDannerbauer, HDariush, ADe Zotti, GDunne, LEales, SFritz, JHopwood, RIbar, EIvison, RJarvis, MKim, SLeeuw, LWe present high-spatial resolution imaging obtained with the Submillimeter Array (SMA) at 880 μm and the Keck adaptive optics (AO) system at the K S-band of a gravitationally lensed submillimeter galaxy (SMG) at z = 4.243 discovered in the Herschel Astrophysical Terahertz Large Area Survey. The SMA data (angular resolution 06) resolve the dust emission into multiple lensed images, while the Keck AO K S-band data (angular resolution 01) resolve the lens into a pair of galaxies separated by 03. We present an optical spectrum of the foreground lens obtained with the Gemini-South telescope that provides a lens redshift of z lens = 0.595 ± 0.005. We develop and apply a new lens modeling technique in the visibility plane that shows that the SMG is magnified by a factor of μ = 4.1 ± 0.2 and has an intrinsic infrared (IR) luminosity of L IR = (2.1 ± 0.2) × 1013 L ⊙. We measure a half-light radius of the background source of r s = 4.4 ± 0.5kpc which implies an IR luminosity surface density of ΣIR = (3.4 ± 0.9) × 1011 L ⊙kpc-2, a value that is typical of z > 2 SMGs but significantly lower than IR luminous galaxies at z 0. The two lens galaxies are compact (r lens 0.9kpc) early-types with Einstein radii of θE1 = 0.57 ± 0.01 and θE2 = 0.40 ± 0.01 that imply masses of M lens1 = (7.4 ± 0.5) × 1010 M ⊙ and M lens2 = (3.7 ± 0.3) × 10 10 M ⊙. The two lensing galaxies are likely about to undergo a dissipationless merger, and the mass and size of the resultant system should be similar to other early-type galaxies at z 0.6. This work highlights the importance of high spatial resolution imaging in developing models of strongly lensed galaxies discovered by Herschel. © 2012. The American Astronomical Society. All rights reserved. |
| spellingShingle | Bussmann, R Gurwell, M Fu, H Smith, D Dye, S Auld, R Baes, M Baker, A Bonfield, D Cava, A Clements, D Cooray, A Coppin, K Dannerbauer, H Dariush, A De Zotti, G Dunne, L Eales, S Fritz, J Hopwood, R Ibar, E Ivison, R Jarvis, M Kim, S Leeuw, L A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243 |
| title | A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243 |
| title_full | A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243 |
| title_fullStr | A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243 |
| title_full_unstemmed | A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243 |
| title_short | A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z=4.243 |
| title_sort | detailed gravitational lens model based on submillimeter array and keck adaptive optics imaging of a herschel atlas submillimeter galaxy at z 4 243 |
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