First detection of the 448 GHz H2O transition in space
We present the first detection of the ortho-H2O 4₂₃ - 3₃₀ transition at 448 GHz in space. We observed this transition in the local (z = 0.010) luminous infrared (IR) galaxy ESO 320-G030 (IRAS F11506-3851) using the Atacama Large Millimeter/submillimeter Array (ALMA). The water 4₂₃ - 3₃₀ emission, w...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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EDP Sciences
2017
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| _version_ | 1826305819878096896 |
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| author | Pereira-Santaella, M González-Alfonso, E Usero, A García-Burillo, S Martín-Pintado, J Colina, L Alonso-Herrero, A Arribas, S Cazzoli, S Rico, F Rigopoulou, D Bergmann, T |
| author_facet | Pereira-Santaella, M González-Alfonso, E Usero, A García-Burillo, S Martín-Pintado, J Colina, L Alonso-Herrero, A Arribas, S Cazzoli, S Rico, F Rigopoulou, D Bergmann, T |
| author_sort | Pereira-Santaella, M |
| collection | OXFORD |
| description | We present the first detection of the ortho-H2O 4₂₃ - 3₃₀ transition at 448 GHz in space. We observed this transition in the local (z = 0.010) luminous infrared (IR) galaxy ESO 320-G030 (IRAS F11506-3851) using the Atacama Large Millimeter/submillimeter Array (ALMA). The water 4₂₃ - 3₃₀ emission, which originates in the highly obscured nucleus of this galaxy, is spatially resolved over a region of ~65 pc in diameter and shows a regular rotation pattern compatible with the global molecular and ionized gas kinematics. The line profile is symmetric and well fitted by a Gaussian with an integrated flux of 37.0 ± 0.7 Jy km s^-1 . Models predict this water transition as a potential collisionally excited maser transition. On the contrary, in this galaxy, we find that the 4₂₃ - 3₃₀ emission is primarily excited by the intense far-IR radiation field present in its nucleus. According to our modeling, this transition is a probe of deeply buried galaxy nuclei thanks to the high dust optical depths (τ 100μm > 1, NH > 10^24 cm^-2 ) required to efficiently excite it. |
| first_indexed | 2024-03-07T06:38:38Z |
| format | Journal article |
| id | oxford-uuid:f885614a-1033-4fd7-a4c5-f8a3e0eb3102 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:38:38Z |
| publishDate | 2017 |
| publisher | EDP Sciences |
| record_format | dspace |
| spelling | oxford-uuid:f885614a-1033-4fd7-a4c5-f8a3e0eb31022022-03-27T12:50:52ZFirst detection of the 448 GHz H2O transition in spaceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f885614a-1033-4fd7-a4c5-f8a3e0eb3102EnglishSymplectic Elements at OxfordEDP Sciences2017Pereira-Santaella, MGonzález-Alfonso, EUsero, AGarcía-Burillo, SMartín-Pintado, JColina, LAlonso-Herrero, AArribas, SCazzoli, SRico, FRigopoulou, DBergmann, TWe present the first detection of the ortho-H2O 4₂₃ - 3₃₀ transition at 448 GHz in space. We observed this transition in the local (z = 0.010) luminous infrared (IR) galaxy ESO 320-G030 (IRAS F11506-3851) using the Atacama Large Millimeter/submillimeter Array (ALMA). The water 4₂₃ - 3₃₀ emission, which originates in the highly obscured nucleus of this galaxy, is spatially resolved over a region of ~65 pc in diameter and shows a regular rotation pattern compatible with the global molecular and ionized gas kinematics. The line profile is symmetric and well fitted by a Gaussian with an integrated flux of 37.0 ± 0.7 Jy km s^-1 . Models predict this water transition as a potential collisionally excited maser transition. On the contrary, in this galaxy, we find that the 4₂₃ - 3₃₀ emission is primarily excited by the intense far-IR radiation field present in its nucleus. According to our modeling, this transition is a probe of deeply buried galaxy nuclei thanks to the high dust optical depths (τ 100μm > 1, NH > 10^24 cm^-2 ) required to efficiently excite it. |
| spellingShingle | Pereira-Santaella, M González-Alfonso, E Usero, A García-Burillo, S Martín-Pintado, J Colina, L Alonso-Herrero, A Arribas, S Cazzoli, S Rico, F Rigopoulou, D Bergmann, T First detection of the 448 GHz H2O transition in space |
| title | First detection of the 448 GHz H2O transition in space |
| title_full | First detection of the 448 GHz H2O transition in space |
| title_fullStr | First detection of the 448 GHz H2O transition in space |
| title_full_unstemmed | First detection of the 448 GHz H2O transition in space |
| title_short | First detection of the 448 GHz H2O transition in space |
| title_sort | first detection of the 448 ghz h2o transition in space |
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