A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra) Luminous Infrared Galaxies
We present Herschel far-IR photometry and spectroscopy as well as ground based CO observations of an intermediate redshift (0.21 < z < 0.88) sample of Herschel-selected (ultra)-luminous infrared galaxies (L_IR > 10^11.5L_sun). With these measurements we trace the dust continuum,...
| Principais autores: | , , , , , , , , , , , , , , , , , , |
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| Formato: | Journal article |
| Idioma: | English |
| Publicado em: |
Institute of Physics Publishing
2014
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| _version_ | 1826303822782267392 |
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| author | Magdis, G Rigopoulou, D Hopwood, R Huang, J Farrah, D Pearson, C Alonso-Herrero, A Bock, J Clements, D Cooray, A Griffin, M Oliver, S Fournon, P Riechers, D Swinyard, B Scott, D Thatte, N Valtchanov, I Vaccari, M |
| author_facet | Magdis, G Rigopoulou, D Hopwood, R Huang, J Farrah, D Pearson, C Alonso-Herrero, A Bock, J Clements, D Cooray, A Griffin, M Oliver, S Fournon, P Riechers, D Swinyard, B Scott, D Thatte, N Valtchanov, I Vaccari, M |
| author_sort | Magdis, G |
| collection | OXFORD |
| description | We present Herschel far-IR photometry and spectroscopy as well as ground based CO observations of an intermediate redshift (0.21 < z < 0.88) sample of Herschel-selected (ultra)-luminous infrared galaxies (L_IR > 10^11.5L_sun). With these measurements we trace the dust continuum, far-IR atomic line emission, in particular [CII]\,157.7microns, as well as the molecular gas of z~0.3 (U)LIRGs and perform a detailed investigation of the interstellar medium of the population. We find that the majority of Herschel-selected intermediate redshift (U)LIRGs have L_CII/L_FIR ratios that are a factor of about 10 higher than that of local ULIRGs and comparable to that of local normal and high-$z$ star forming galaxies. Using our sample to bridge local and high-z [CII] observations, we find that the majority of galaxies at all redshifts and all luminosities follow a L_CII-L_FIR relation with a slope of unity, from which local ULIRGs and high-z AGN dominated sources are clear outliers. We also confirm that the strong anti-correlation between the L_CII/L_FIR ratio and the far-IR color L_60/L_100 observed in the local Universe holds over a broad range of redshifts and luminosities, in the sense that warmer sources exhibit lower L_CII/L_FIR at any epoch. Intermediate redshift ULIRGs are also characterised by large molecular gas reservoirs and by lower star formation efficiencies compared to that of local ULIRGs. The high L_CII/L_FIR ratios, the moderate star formation efficiencies (L_LIR/L_CO or L_IR/M_gas) and the relatively low dust temperatures of our sample (which are also common characteristics of high-z star forming galaxies with ULIRG-like luminosities) indicate that the evolution of the physical properties of (U)LIRGs between the present day and z > 1 is already significant by z ~ 0.3. |
| first_indexed | 2024-03-07T06:08:32Z |
| format | Journal article |
| id | oxford-uuid:eeaaf907-29a7-4a45-818c-b75a6b0ec3f3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:08:32Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:eeaaf907-29a7-4a45-818c-b75a6b0ec3f32022-03-27T11:34:41ZA Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra) Luminous Infrared GalaxiesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:eeaaf907-29a7-4a45-818c-b75a6b0ec3f3EnglishSymplectic Elements at OxfordInstitute of Physics Publishing2014Magdis, GRigopoulou, DHopwood, RHuang, JFarrah, DPearson, CAlonso-Herrero, ABock, JClements, DCooray, AGriffin, MOliver, SFournon, PRiechers, DSwinyard, BScott, DThatte, NValtchanov, IVaccari, MWe present Herschel far-IR photometry and spectroscopy as well as ground based CO observations of an intermediate redshift (0.21 < z < 0.88) sample of Herschel-selected (ultra)-luminous infrared galaxies (L_IR > 10^11.5L_sun). With these measurements we trace the dust continuum, far-IR atomic line emission, in particular [CII]\,157.7microns, as well as the molecular gas of z~0.3 (U)LIRGs and perform a detailed investigation of the interstellar medium of the population. We find that the majority of Herschel-selected intermediate redshift (U)LIRGs have L_CII/L_FIR ratios that are a factor of about 10 higher than that of local ULIRGs and comparable to that of local normal and high-$z$ star forming galaxies. Using our sample to bridge local and high-z [CII] observations, we find that the majority of galaxies at all redshifts and all luminosities follow a L_CII-L_FIR relation with a slope of unity, from which local ULIRGs and high-z AGN dominated sources are clear outliers. We also confirm that the strong anti-correlation between the L_CII/L_FIR ratio and the far-IR color L_60/L_100 observed in the local Universe holds over a broad range of redshifts and luminosities, in the sense that warmer sources exhibit lower L_CII/L_FIR at any epoch. Intermediate redshift ULIRGs are also characterised by large molecular gas reservoirs and by lower star formation efficiencies compared to that of local ULIRGs. The high L_CII/L_FIR ratios, the moderate star formation efficiencies (L_LIR/L_CO or L_IR/M_gas) and the relatively low dust temperatures of our sample (which are also common characteristics of high-z star forming galaxies with ULIRG-like luminosities) indicate that the evolution of the physical properties of (U)LIRGs between the present day and z > 1 is already significant by z ~ 0.3. |
| spellingShingle | Magdis, G Rigopoulou, D Hopwood, R Huang, J Farrah, D Pearson, C Alonso-Herrero, A Bock, J Clements, D Cooray, A Griffin, M Oliver, S Fournon, P Riechers, D Swinyard, B Scott, D Thatte, N Valtchanov, I Vaccari, M A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra) Luminous Infrared Galaxies |
| title | A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra)
Luminous Infrared Galaxies |
| title_full | A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra)
Luminous Infrared Galaxies |
| title_fullStr | A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra)
Luminous Infrared Galaxies |
| title_full_unstemmed | A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra)
Luminous Infrared Galaxies |
| title_short | A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra)
Luminous Infrared Galaxies |
| title_sort | far infrared spectroscopic survey of intermediate redshift ultra luminous infrared galaxies |
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