HYPERION. Interacting companion and outflow in the most luminous $z>6$ quasar
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911750800015360 |
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| author | Tripodi, R. Scholtz, J. Maiolino, R. Fujimoto, S. Carniani, S. Silverman, J. D. Feruglio, C. Ginolfi, M. Zappacosta, L. Costa, T. Jones, G. C. Piconcelli, E. Bischetti, M. Fiore, F. |
| author_facet | Tripodi, R. Scholtz, J. Maiolino, R. Fujimoto, S. Carniani, S. Silverman, J. D. Feruglio, C. Ginolfi, M. Zappacosta, L. Costa, T. Jones, G. C. Piconcelli, E. Bischetti, M. Fiore, F. |
| contents | We present ALMA deep observations of the [CII] 158 $μ$m emission line and the continuum at 253 GHz and 99 GHz towards SDSS J0100+2802 at $z\simeq 6.3$, the most luminous quasi-stellar object (QSO) at z$>$6. J0100+2802 belongs to the HYPERION sample of luminous QSOs at $z\sim 6-7.5$. The observations (at 2.2" resolution in Band 3 and 0.9" resolution in Band 6) are optimized to detect extended emission around the QSO. We detect an interacting, tidally disrupted companion both in [CII], peaking at $z\sim 6.332$, and in continuum, stretching on scales up to 20 kpc from the quasar, with a knotty morphology. The higher velocity dispersion in the direction of the companion emission and the complex morphology of tidally stretched galaxy suggest a possible ongoing or future merger. For the newly-detected companion we derive a range of dust mass, $M_{\rm dust}=(0.3-2.6)\times 10^7\ \rm M_\odot$, and of star formation rate, SFR$=[35-344]\ \rm M_\odot$. This shows that both the QSO and its companion are gas rich and that a major merger may be at the origin of the boosted star formation. We also detect a broad blueshifted component in the [CII] spectrum, that we interpret as a gaseous outflow for which we estimate a mass outflow rate in the range $\dot{M}_{\rm out}=(118-269)\ \rm M_\odot\ yr^{-1}$. J0100+2802 was recently found to reside in a strong overdensity, however this close companion remained undetected by both previous higher resolution ALMA observations and by JWST-NIRCAM imaging. Our results highlight the importance of deep medium-resolution ALMA observations for the study of QSOs and their environment at the Epoch of Reionization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_01644 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | HYPERION. Interacting companion and outflow in the most luminous $z>6$ quasar Tripodi, R. Scholtz, J. Maiolino, R. Fujimoto, S. Carniani, S. Silverman, J. D. Feruglio, C. Ginolfi, M. Zappacosta, L. Costa, T. Jones, G. C. Piconcelli, E. Bischetti, M. Fiore, F. Astrophysics of Galaxies We present ALMA deep observations of the [CII] 158 $μ$m emission line and the continuum at 253 GHz and 99 GHz towards SDSS J0100+2802 at $z\simeq 6.3$, the most luminous quasi-stellar object (QSO) at z$>$6. J0100+2802 belongs to the HYPERION sample of luminous QSOs at $z\sim 6-7.5$. The observations (at 2.2" resolution in Band 3 and 0.9" resolution in Band 6) are optimized to detect extended emission around the QSO. We detect an interacting, tidally disrupted companion both in [CII], peaking at $z\sim 6.332$, and in continuum, stretching on scales up to 20 kpc from the quasar, with a knotty morphology. The higher velocity dispersion in the direction of the companion emission and the complex morphology of tidally stretched galaxy suggest a possible ongoing or future merger. For the newly-detected companion we derive a range of dust mass, $M_{\rm dust}=(0.3-2.6)\times 10^7\ \rm M_\odot$, and of star formation rate, SFR$=[35-344]\ \rm M_\odot$. This shows that both the QSO and its companion are gas rich and that a major merger may be at the origin of the boosted star formation. We also detect a broad blueshifted component in the [CII] spectrum, that we interpret as a gaseous outflow for which we estimate a mass outflow rate in the range $\dot{M}_{\rm out}=(118-269)\ \rm M_\odot\ yr^{-1}$. J0100+2802 was recently found to reside in a strong overdensity, however this close companion remained undetected by both previous higher resolution ALMA observations and by JWST-NIRCAM imaging. Our results highlight the importance of deep medium-resolution ALMA observations for the study of QSOs and their environment at the Epoch of Reionization. |
| title | HYPERION. Interacting companion and outflow in the most luminous $z>6$ quasar |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2306.01644 |