Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3
The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to study molecular species other than CO, which are otherwise difficult to observe in high-z galaxies. Am...
| Autor: | |
|---|---|
| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2011 |
| País: | México |
| Recursos: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/1868 |
| Acesso em linha: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1868 |
| Access Level: | acceso abierto |
| Palavra-chave: | info:eu-repo/classification/Inspec/Galaxies: high-redshift info:eu-repo/classification/Inspec/Galaxies: starburst info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Infrared: galaxies info:eu-repo/classification/Inspec/Submillimeter: galaxies info:eu-repo/classification/Inspec/Radio lines: galaxie info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 |
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Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3David Hughesinfo:eu-repo/classification/Inspec/Galaxies: high-redshiftinfo:eu-repo/classification/Inspec/Galaxies: starburstinfo:eu-repo/classification/Inspec/Galaxies: activeinfo:eu-repo/classification/Inspec/Infrared: galaxiesinfo:eu-repo/classification/Inspec/Submillimeter: galaxiesinfo:eu-repo/classification/Inspec/Radio lines: galaxieinfo:eu-repo/classification/cti/1info:eu-repo/classification/cti/21info:eu-repo/classification/cti/21The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to study molecular species other than CO, which are otherwise difficult to observe in high-z galaxies. Among the lensed galaxies already identified by H-ATLAS, the source J090302.9-014127B (SDP.17b) at z = 2.305 is remarkable because of its excitation conditions and a tentative detection of the H₂O 2₀₂2-1₁₁ emission line (Lupu et al. 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277–371 GHz receivers. The H₂O line is detected at a redshift of z = 2.3049 ± 0.0006, with a flux of 7.8 ± 0.5 Jy km s⁻¹ and a FWHM of 250 ± 60 km s⁻¹. The new flux is 2.4 times weaker than the previous tentative detection, although both remain marginally consistent within 1.6σ. The intrinsic line luminosity and ratio of H₂O(2₀₂−1₁₁)/CO(8−7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H₂O)/L is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H₂O 2₀₂−1₁₁ line in SDP.17b implies an efficient excitation mechanism of the water levels that must occur in very dense and warm interstellar gas probably similar to Mrk 231.Astronomy & Astrophysics2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1868reponame:Repositorio Institucional del INAOEinstname:Instituto Nacional de Astrofísica, Óptica y Electrónicainstacron:INAOEengcitation:Omont, A., et al., (2011), Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3, Astronomy & Astrophysics, Vol.530(L3):1-5info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:inaoe.repositorioinstitucional.mx:1009/18682024-08-28T03:23:01Z |
| dc.title.none.fl_str_mv |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| title |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| spellingShingle |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 David Hughes info:eu-repo/classification/Inspec/Galaxies: high-redshift info:eu-repo/classification/Inspec/Galaxies: starburst info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Infrared: galaxies info:eu-repo/classification/Inspec/Submillimeter: galaxies info:eu-repo/classification/Inspec/Radio lines: galaxie info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| title_short |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| title_full |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| title_fullStr |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| title_full_unstemmed |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| title_sort |
Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3 |
| dc.creator.none.fl_str_mv |
David Hughes |
| author |
David Hughes |
| author_facet |
David Hughes |
| author_role |
author |
| dc.subject.none.fl_str_mv |
info:eu-repo/classification/Inspec/Galaxies: high-redshift info:eu-repo/classification/Inspec/Galaxies: starburst info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Infrared: galaxies info:eu-repo/classification/Inspec/Submillimeter: galaxies info:eu-repo/classification/Inspec/Radio lines: galaxie info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| topic |
info:eu-repo/classification/Inspec/Galaxies: high-redshift info:eu-repo/classification/Inspec/Galaxies: starburst info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Infrared: galaxies info:eu-repo/classification/Inspec/Submillimeter: galaxies info:eu-repo/classification/Inspec/Radio lines: galaxie info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| description |
The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to study molecular species other than CO, which are otherwise difficult to observe in high-z galaxies. Among the lensed galaxies already identified by H-ATLAS, the source J090302.9-014127B (SDP.17b) at z = 2.305 is remarkable because of its excitation conditions and a tentative detection of the H₂O 2₀₂2-1₁₁ emission line (Lupu et al. 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277–371 GHz receivers. The H₂O line is detected at a redshift of z = 2.3049 ± 0.0006, with a flux of 7.8 ± 0.5 Jy km s⁻¹ and a FWHM of 250 ± 60 km s⁻¹. The new flux is 2.4 times weaker than the previous tentative detection, although both remain marginally consistent within 1.6σ. The intrinsic line luminosity and ratio of H₂O(2₀₂−1₁₁)/CO(8−7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H₂O)/L is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H₂O 2₀₂−1₁₁ line in SDP.17b implies an efficient excitation mechanism of the water levels that must occur in very dense and warm interstellar gas probably similar to Mrk 231. |
| publishDate |
2011 |
| dc.date.none.fl_str_mv |
2011 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1868 |
| url |
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1868 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
citation:Omont, A., et al., (2011), Observation of H₂O in a strongly lensed Herschel-ATLAS source at z = 2.3, Astronomy & Astrophysics, Vol.530(L3):1-5 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0 |
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openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0 |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Astronomy & Astrophysics |
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Astronomy & Astrophysics |
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reponame:Repositorio Institucional del INAOE instname:Instituto Nacional de Astrofísica, Óptica y Electrónica instacron:INAOE |
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Instituto Nacional de Astrofísica, Óptica y Electrónica |
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INAOE |
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INAOE |
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