First Measurements of Black Hole Accretion and Radio-jet Timescales in a Young Quasar at the Edge of Reionization
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866910888079917056 |
|---|---|
| author | Rojas-Ruiz, Sofía Momjian, Emmanuel Davies, Frederick B. Bañados, Eduardo Eilers, Anna-Christina Bosman, Sarah B. Vaidya, Bhargav Carilli, Chris Mazzucchelli, Chiara Connor, Thomas Khusanova, Yana |
| author_facet | Rojas-Ruiz, Sofía Momjian, Emmanuel Davies, Frederick B. Bañados, Eduardo Eilers, Anna-Christina Bosman, Sarah B. Vaidya, Bhargav Carilli, Chris Mazzucchelli, Chiara Connor, Thomas Khusanova, Yana |
| contents | We present the first study dedicated to measuring the timescales for black hole accretion and jet launch in a quasar at the edge of Reionization, PSO J352.4034-15.3373 at z = 5.832 $\pm$ 0.001. Previous work presented evidence of the strong radio synchrotron emission from the jet affecting the host galaxy dust-dominated continuum emission at $ν_{\rm rest}=683$ GHz ($ν_{\rm obs}=100$ GHz), implying a break in the synchrotron spectrum. In this work, we present quasi-simultaneous observations at 1.5\, GHz - 42\,GHz with the Karl G. Jansky Very Large Array (VLA), and derive a frequency break at $ν^{\rm break}_{\rm rest} = 196.46$ GHz ($ν^{\rm break}_{\rm obs} = 28.76$ GHz). Modeling these observations, we calculate the jet spectral aging from the cooling of electrons to be $t_{\mathrm{spec}}\sim 580$ yr. From this measurement, we approximate the dynamical age $t_{\mathrm{dyn}}$ to be $\sim2,000$ yr, implying a recent jet ejection. We compare the jet timescale to the quasar's lifetime ($t_{\mathrm{Q}}$) that indicates the duration of the latest black hole accretion event and is derived from the proximity zone size in the rest-UV/optical spectrum. However, a ghostly Damped Ly$α$ (DLA) system affects this measurement yielding an upper limit of $t_{\mathrm{Q}} \lesssim 10^4$ yr, consistent with the jet lifetime and indicative of a young quasar. This suggests that the triggering of a UV-bright quasar phase may occur within comparable timescales as the launch of a relativistic radio jet. Therefore, we may be witnessing an early stage of black hole and jet interactions in a quasar during the first gigayear of the universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_16609 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | First Measurements of Black Hole Accretion and Radio-jet Timescales in a Young Quasar at the Edge of Reionization Rojas-Ruiz, Sofía Momjian, Emmanuel Davies, Frederick B. Bañados, Eduardo Eilers, Anna-Christina Bosman, Sarah B. Vaidya, Bhargav Carilli, Chris Mazzucchelli, Chiara Connor, Thomas Khusanova, Yana Astrophysics of Galaxies High Energy Astrophysical Phenomena Space Physics We present the first study dedicated to measuring the timescales for black hole accretion and jet launch in a quasar at the edge of Reionization, PSO J352.4034-15.3373 at z = 5.832 $\pm$ 0.001. Previous work presented evidence of the strong radio synchrotron emission from the jet affecting the host galaxy dust-dominated continuum emission at $ν_{\rm rest}=683$ GHz ($ν_{\rm obs}=100$ GHz), implying a break in the synchrotron spectrum. In this work, we present quasi-simultaneous observations at 1.5\, GHz - 42\,GHz with the Karl G. Jansky Very Large Array (VLA), and derive a frequency break at $ν^{\rm break}_{\rm rest} = 196.46$ GHz ($ν^{\rm break}_{\rm obs} = 28.76$ GHz). Modeling these observations, we calculate the jet spectral aging from the cooling of electrons to be $t_{\mathrm{spec}}\sim 580$ yr. From this measurement, we approximate the dynamical age $t_{\mathrm{dyn}}$ to be $\sim2,000$ yr, implying a recent jet ejection. We compare the jet timescale to the quasar's lifetime ($t_{\mathrm{Q}}$) that indicates the duration of the latest black hole accretion event and is derived from the proximity zone size in the rest-UV/optical spectrum. However, a ghostly Damped Ly$α$ (DLA) system affects this measurement yielding an upper limit of $t_{\mathrm{Q}} \lesssim 10^4$ yr, consistent with the jet lifetime and indicative of a young quasar. This suggests that the triggering of a UV-bright quasar phase may occur within comparable timescales as the launch of a relativistic radio jet. Therefore, we may be witnessing an early stage of black hole and jet interactions in a quasar during the first gigayear of the universe. |
| title | First Measurements of Black Hole Accretion and Radio-jet Timescales in a Young Quasar at the Edge of Reionization |
| topic | Astrophysics of Galaxies High Energy Astrophysical Phenomena Space Physics |
| url | https://arxiv.org/abs/2503.16609 |