The evolution of the Fundamental Plane of radio galaxies from z~0.5 to the present day
We present deep spectroscopic data for a 24-object subsample of our full 41-object z~0.5 radio galaxy sample in order to investigate the evolution of the Fundamental Plane of radio galaxies. We find that the low-luminosity, FRI-type, radio galaxies in our sample are consistent with the local Fundame...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2010
|
| _version_ | 1826257752118263808 |
|---|---|
| author | Herbert, P Jarvis, M Willott, C McLure, R Mitchell, E Rawlings, S Hill, G Dunlop, J |
| author_facet | Herbert, P Jarvis, M Willott, C McLure, R Mitchell, E Rawlings, S Hill, G Dunlop, J |
| author_sort | Herbert, P |
| collection | OXFORD |
| description | We present deep spectroscopic data for a 24-object subsample of our full 41-object z~0.5 radio galaxy sample in order to investigate the evolution of the Fundamental Plane of radio galaxies. We find that the low-luminosity, FRI-type, radio galaxies in our sample are consistent with the local Fundamental Plane of radio galaxies defined by Bettoni et al. when corrected for simple passive evolution of their stellar populations. However, we find that the higher luminosity, FRII-type radio galaxies are inconsistent with the local Fundamental Plane if only passive evolution is considered, and find evidence for a rotation in the Fundamental Plane at z~0.5 when compared with the local relation. We show that neither passive evolution, nor a mass-dependent evolution in the mass-to-light ratio, nor an evolution in the size of the host galaxies can, by themselves, plausibly explain the observed tilt. However, we suggest that some combination of all three effects, with size evolution as the dominant factor, may be sufficient to explain the difference between the planes. We also find evidence for a correlation between host galaxy velocity dispersion and radio luminosity at the 97% significance level within our sub-sample, although further observations are required in order to determine whether this is different for the FRI and FRII radio sources. Assuming that the M_BH - sigma relation still holds at z~0.5, this implies that radio luminosity scales with black hole mass, in agreement with previous studies. |
| first_indexed | 2024-03-06T18:23:08Z |
| format | Journal article |
| id | oxford-uuid:070022df-a8bb-4d4a-9fe3-95cbc4387b15 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:23:08Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:070022df-a8bb-4d4a-9fe3-95cbc4387b152022-03-26T09:05:21ZThe evolution of the Fundamental Plane of radio galaxies from z~0.5 to the present dayJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:070022df-a8bb-4d4a-9fe3-95cbc4387b15EnglishSymplectic Elements at Oxford2010Herbert, PJarvis, MWillott, CMcLure, RMitchell, ERawlings, SHill, GDunlop, JWe present deep spectroscopic data for a 24-object subsample of our full 41-object z~0.5 radio galaxy sample in order to investigate the evolution of the Fundamental Plane of radio galaxies. We find that the low-luminosity, FRI-type, radio galaxies in our sample are consistent with the local Fundamental Plane of radio galaxies defined by Bettoni et al. when corrected for simple passive evolution of their stellar populations. However, we find that the higher luminosity, FRII-type radio galaxies are inconsistent with the local Fundamental Plane if only passive evolution is considered, and find evidence for a rotation in the Fundamental Plane at z~0.5 when compared with the local relation. We show that neither passive evolution, nor a mass-dependent evolution in the mass-to-light ratio, nor an evolution in the size of the host galaxies can, by themselves, plausibly explain the observed tilt. However, we suggest that some combination of all three effects, with size evolution as the dominant factor, may be sufficient to explain the difference between the planes. We also find evidence for a correlation between host galaxy velocity dispersion and radio luminosity at the 97% significance level within our sub-sample, although further observations are required in order to determine whether this is different for the FRI and FRII radio sources. Assuming that the M_BH - sigma relation still holds at z~0.5, this implies that radio luminosity scales with black hole mass, in agreement with previous studies. |
| spellingShingle | Herbert, P Jarvis, M Willott, C McLure, R Mitchell, E Rawlings, S Hill, G Dunlop, J The evolution of the Fundamental Plane of radio galaxies from z~0.5 to the present day |
| title | The evolution of the Fundamental Plane of radio galaxies from z~0.5 to
the present day |
| title_full | The evolution of the Fundamental Plane of radio galaxies from z~0.5 to
the present day |
| title_fullStr | The evolution of the Fundamental Plane of radio galaxies from z~0.5 to
the present day |
| title_full_unstemmed | The evolution of the Fundamental Plane of radio galaxies from z~0.5 to
the present day |
| title_short | The evolution of the Fundamental Plane of radio galaxies from z~0.5 to
the present day |
| title_sort | evolution of the fundamental plane of radio galaxies from z 0 5 to the present day |
| work_keys_str_mv | AT herbertp theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT jarvism theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT willottc theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT mclurer theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT mitchelle theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT rawlingss theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT hillg theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT dunlopj theevolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT herbertp evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT jarvism evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT willottc evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT mclurer evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT mitchelle evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT rawlingss evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT hillg evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday AT dunlopj evolutionofthefundamentalplaneofradiogalaxiesfromz05tothepresentday |