A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54
Using long-slit optical spectroscopy obtained at the 10.4 m Gran Telescopio Canarias, we have examined the gaseous environment of the radio-loud quasar TXS 1436+157 (z = 2.54),previously known to be associated with a large Lyαnebula and a spatially extended Lyα-absorbing structure. From the Lyαnebul...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2013 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/2234 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2234 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Galaxies: evolution info:eu-repo/classification/Inspec/Galaxies: ISM info:eu-repo/classification/Inspec/Quasars: absorption lines info:eu-repo/classification/Inspec/Qasars: emission lines info:eu-repo/classification/Inspec/Quasars: individual: TXS 1436+157 info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 |
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A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54Andrew HumphreyItziar Aretxagainfo:eu-repo/classification/Inspec/Galaxies: activeinfo:eu-repo/classification/Inspec/Galaxies: evolutioninfo:eu-repo/classification/Inspec/Galaxies: ISMinfo:eu-repo/classification/Inspec/Quasars: absorption linesinfo:eu-repo/classification/Inspec/Qasars: emission linesinfo:eu-repo/classification/Inspec/Quasars: individual: TXS 1436+157info:eu-repo/classification/cti/1info:eu-repo/classification/cti/21info:eu-repo/classification/cti/21Using long-slit optical spectroscopy obtained at the 10.4 m Gran Telescopio Canarias, we have examined the gaseous environment of the radio-loud quasar TXS 1436+157 (z = 2.54),previously known to be associated with a large Lyαnebula and a spatially extended Lyα-absorbing structure. From the Lyαnebula, we measure kinematic properties consistent withinfall at a rate of ∼10–100 M⊙ yr⁻¹ – more than sufficient to power a quasar at the top of theluminosity function.The absorbing structure lies outside of the Lyαnebula, at a radius of ≳40 kpc from thequasar. Against the bright unresolved continuum and line emission from the quasar, we detectin absorption the NVλλ1239, 1241, CIVλλ1548, 1551 and Si IVλλ1394, 1403 doublets, withno unambiguous detection of absorption lines from any low-ionization species of metal. Themetal column densities, taken together with the HI column density measurement from the literature, indicate that the absorbing gas is predominantly ionized by the quasar, has a massof hydrogen of ≳1.6 × 10¹¹ M⊙, a gas density of ≤18 cm⁻³, a line-of-sight thickness of≥18 pc and a covering factor approaching unity. While this absorbing structure is clearly notcomposed of pristine gas, it has an extremely low metallicity, with ionizationmodels providinga 3σ limit of 12+log(O/H) ≤ 7.3.To explain these results, we discuss a scenario involving starburst-driven superbubbles andthe creation of infalling filaments of cold gas which fuel/trigger the quasar. We also discussthe possibility of detecting large-scale absorbers such as this in emission when illuminated bya powerful quasar.Monthly Notices of the Royal Astronomical Society2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2234reponame:Repositorio Institucional del INAOEinstname:Instituto Nacional de Astrofísica, Óptica y Electrónicainstacron:INAOEengcitation:Humphrey, A., et al., (2013). A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54, Monthly Notices of the Royal Astronomical Society, Vol. 428(1):563-572info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:inaoe.repositorioinstitucional.mx:1009/22342024-08-28T03:23:06Z |
| dc.title.none.fl_str_mv |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| title |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| spellingShingle |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 Andrew Humphrey info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Galaxies: evolution info:eu-repo/classification/Inspec/Galaxies: ISM info:eu-repo/classification/Inspec/Quasars: absorption lines info:eu-repo/classification/Inspec/Qasars: emission lines info:eu-repo/classification/Inspec/Quasars: individual: TXS 1436+157 info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| title_short |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| title_full |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| title_fullStr |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| title_full_unstemmed |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| title_sort |
A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54 |
| dc.creator.none.fl_str_mv |
Andrew Humphrey Itziar Aretxaga |
| author |
Andrew Humphrey |
| author_facet |
Andrew Humphrey Itziar Aretxaga |
| author_role |
author |
| author2 |
Itziar Aretxaga |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
info:eu-repo/classification/Inspec/Galaxies: active info:eu-repo/classification/Inspec/Galaxies: evolution info:eu-repo/classification/Inspec/Galaxies: ISM info:eu-repo/classification/Inspec/Quasars: absorption lines info:eu-repo/classification/Inspec/Qasars: emission lines info:eu-repo/classification/Inspec/Quasars: individual: TXS 1436+157 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: active info:eu-repo/classification/Inspec/Galaxies: evolution info:eu-repo/classification/Inspec/Galaxies: ISM info:eu-repo/classification/Inspec/Quasars: absorption lines info:eu-repo/classification/Inspec/Qasars: emission lines info:eu-repo/classification/Inspec/Quasars: individual: TXS 1436+157 info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| description |
Using long-slit optical spectroscopy obtained at the 10.4 m Gran Telescopio Canarias, we have examined the gaseous environment of the radio-loud quasar TXS 1436+157 (z = 2.54),previously known to be associated with a large Lyαnebula and a spatially extended Lyα-absorbing structure. From the Lyαnebula, we measure kinematic properties consistent withinfall at a rate of ∼10–100 M⊙ yr⁻¹ – more than sufficient to power a quasar at the top of theluminosity function.The absorbing structure lies outside of the Lyαnebula, at a radius of ≳40 kpc from thequasar. Against the bright unresolved continuum and line emission from the quasar, we detectin absorption the NVλλ1239, 1241, CIVλλ1548, 1551 and Si IVλλ1394, 1403 doublets, withno unambiguous detection of absorption lines from any low-ionization species of metal. Themetal column densities, taken together with the HI column density measurement from the literature, indicate that the absorbing gas is predominantly ionized by the quasar, has a massof hydrogen of ≳1.6 × 10¹¹ M⊙, a gas density of ≤18 cm⁻³, a line-of-sight thickness of≥18 pc and a covering factor approaching unity. While this absorbing structure is clearly notcomposed of pristine gas, it has an extremely low metallicity, with ionizationmodels providinga 3σ limit of 12+log(O/H) ≤ 7.3.To explain these results, we discuss a scenario involving starburst-driven superbubbles andthe creation of infalling filaments of cold gas which fuel/trigger the quasar. We also discussthe possibility of detecting large-scale absorbers such as this in emission when illuminated bya powerful quasar. |
| publishDate |
2013 |
| dc.date.none.fl_str_mv |
2013 |
| 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/1009/2234 |
| url |
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2234 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
citation:Humphrey, A., et al., (2013). A massive bubble of extremely metal-poor gas around a collapsing Lyα blob at z = 2.54, Monthly Notices of the Royal Astronomical Society, Vol. 428(1):563-572 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0 |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0 |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Monthly Notices of the Royal Astronomical Society |
| publisher.none.fl_str_mv |
Monthly Notices of the Royal Astronomical Society |
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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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Repositorio Institucional del INAOE |
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Repositorio Institucional del INAOE |
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15,81155 |