Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field at z~0.5
We present multi-object spectroscopy of galaxies in the immediate (Mpc-scale) environments of four low-power (L_1.4 GHz < 10^25 W/Hz) radio galaxies at z~0.5, selected from the Subaru/XMM-Newton Deep Field. We use the spectra to calculate velocity dispersions and central redshifts of the grou...
| Main Authors: | , , , , |
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| Formato: | Journal article |
| Publicado: |
2007
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| _version_ | 1826291929167429632 |
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| author | Geach, J Simpson, C Rawlings, S Read, A Watson, M |
| author_facet | Geach, J Simpson, C Rawlings, S Read, A Watson, M |
| author_sort | Geach, J |
| collection | OXFORD |
| description | We present multi-object spectroscopy of galaxies in the immediate (Mpc-scale) environments of four low-power (L_1.4 GHz < 10^25 W/Hz) radio galaxies at z~0.5, selected from the Subaru/XMM-Newton Deep Field. We use the spectra to calculate velocity dispersions and central redshifts of the groups the radio galaxies inhabit, and combined with XMM-Newton (0.3-10 keV) X-ray observations investigate the L_X--sigma_v and T_X--sigma_v scaling relationships. All the radio galaxies reside in moderately rich groups -- intermediate environments between poor groups and rich clusters, with remarkably similar X-ray properties. We concentrate our discussion on our best statistical example that we interpret as a low-power (FRI) source triggered within a sub-group, which in turn is interacting with a nearby group of galaxies, containing the bulk of the X-ray emission for the system -- a basic scenario which can be compared to more powerful radio sources at both high (z>4) and low (z<0.1) redshifts. This suggests that galaxy-galaxy interactions triggered by group mergers may play an important role in the life-cycle of radio galaxies at all epochs and luminosities. |
| first_indexed | 2024-03-07T03:06:53Z |
| format | Journal article |
| id | oxford-uuid:b2d96cf2-a4aa-41c9-98e5-3657ae2db8f4 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:06:53Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:b2d96cf2-a4aa-41c9-98e5-3657ae2db8f42022-03-27T04:14:39ZLow-power radio galaxy environments in the Subaru/XMM-Newton Deep Field at z~0.5Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b2d96cf2-a4aa-41c9-98e5-3657ae2db8f4Symplectic Elements at Oxford2007Geach, JSimpson, CRawlings, SRead, AWatson, MWe present multi-object spectroscopy of galaxies in the immediate (Mpc-scale) environments of four low-power (L_1.4 GHz < 10^25 W/Hz) radio galaxies at z~0.5, selected from the Subaru/XMM-Newton Deep Field. We use the spectra to calculate velocity dispersions and central redshifts of the groups the radio galaxies inhabit, and combined with XMM-Newton (0.3-10 keV) X-ray observations investigate the L_X--sigma_v and T_X--sigma_v scaling relationships. All the radio galaxies reside in moderately rich groups -- intermediate environments between poor groups and rich clusters, with remarkably similar X-ray properties. We concentrate our discussion on our best statistical example that we interpret as a low-power (FRI) source triggered within a sub-group, which in turn is interacting with a nearby group of galaxies, containing the bulk of the X-ray emission for the system -- a basic scenario which can be compared to more powerful radio sources at both high (z>4) and low (z<0.1) redshifts. This suggests that galaxy-galaxy interactions triggered by group mergers may play an important role in the life-cycle of radio galaxies at all epochs and luminosities. |
| spellingShingle | Geach, J Simpson, C Rawlings, S Read, A Watson, M Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field at z~0.5 |
| title | Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field
at z~0.5 |
| title_full | Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field
at z~0.5 |
| title_fullStr | Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field
at z~0.5 |
| title_full_unstemmed | Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field
at z~0.5 |
| title_short | Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field
at z~0.5 |
| title_sort | low power radio galaxy environments in the subaru xmm newton deep field at z 0 5 |
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