Spatially resolved dust properties over 50 kpc in a hyperluminous galaxy merger at $z = 4.6$
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866913743575711744 |
|---|---|
| author | Aranda, Román Fernández Santos, Tanio Díaz Hatziminaoglou, Evanthia Aravena, Manuel Stern, Daniel Armus, Lee Assef, Roberto J. Blain, Andrew W. Charmandaris, Vassilis Decarli, Roberto Eisenhardt, Peter R. M. Ferkinhoff, Carl González-López, Jorge Jun, Hyunsung D. Li, Guodong Liao, Mai Shevill, Victoria Shobhana, Devika Tsai, Chao-Wei Vayner, Andrey Wu, Jingwen Zewdie, Dejene |
| author_facet | Aranda, Román Fernández Santos, Tanio Díaz Hatziminaoglou, Evanthia Aravena, Manuel Stern, Daniel Armus, Lee Assef, Roberto J. Blain, Andrew W. Charmandaris, Vassilis Decarli, Roberto Eisenhardt, Peter R. M. Ferkinhoff, Carl González-López, Jorge Jun, Hyunsung D. Li, Guodong Liao, Mai Shevill, Victoria Shobhana, Devika Tsai, Chao-Wei Vayner, Andrey Wu, Jingwen Zewdie, Dejene |
| contents | We present spatially resolved dust-continuum ALMA observations from rest-frame $\sim$60 to $\sim$600 $μ$m (bands 3-10) of the hyperluminous hot dust-obscured galaxy (hot DOG) WISE J224607.6-052634.9 (W2246-0526), at redshift $z=4.6$. W2246-0526 is interacting with at least three companion galaxies, forming a system connected by tidal streams. We model the multiwavelength ALMA observations of the dust continuum using a modified blackbody, from which we derive the dust properties (mass, emissivity index, area of the emitting region, and temperature) in the hot DOG and resolved structures across a region of nearly $\sim$50 kpc. The peak temperature at the location of the hot DOG, $\sim$110 K, is likely the consequence of heating by the central quasar. The dust temperature drops to $\sim$40 K at a radius of $\sim$8 kpc, suggesting that heating by the quasar beyond that distance is nondominant. The dust in the connecting streams between the host and companion galaxies is at temperatures between 30-40 K, typical of starburst galaxies, suggesting it is most likely heated by recent, in-situ star formation. This is the first time dust properties are spatially resolved over several tens of kpc in a galaxy system beyond Cosmic Noon --this is more than six times the scales previously probed in galaxies at those redshifts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_10503 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spatially resolved dust properties over 50 kpc in a hyperluminous galaxy merger at $z = 4.6$ Aranda, Román Fernández Santos, Tanio Díaz Hatziminaoglou, Evanthia Aravena, Manuel Stern, Daniel Armus, Lee Assef, Roberto J. Blain, Andrew W. Charmandaris, Vassilis Decarli, Roberto Eisenhardt, Peter R. M. Ferkinhoff, Carl González-López, Jorge Jun, Hyunsung D. Li, Guodong Liao, Mai Shevill, Victoria Shobhana, Devika Tsai, Chao-Wei Vayner, Andrey Wu, Jingwen Zewdie, Dejene Astrophysics of Galaxies We present spatially resolved dust-continuum ALMA observations from rest-frame $\sim$60 to $\sim$600 $μ$m (bands 3-10) of the hyperluminous hot dust-obscured galaxy (hot DOG) WISE J224607.6-052634.9 (W2246-0526), at redshift $z=4.6$. W2246-0526 is interacting with at least three companion galaxies, forming a system connected by tidal streams. We model the multiwavelength ALMA observations of the dust continuum using a modified blackbody, from which we derive the dust properties (mass, emissivity index, area of the emitting region, and temperature) in the hot DOG and resolved structures across a region of nearly $\sim$50 kpc. The peak temperature at the location of the hot DOG, $\sim$110 K, is likely the consequence of heating by the central quasar. The dust temperature drops to $\sim$40 K at a radius of $\sim$8 kpc, suggesting that heating by the quasar beyond that distance is nondominant. The dust in the connecting streams between the host and companion galaxies is at temperatures between 30-40 K, typical of starburst galaxies, suggesting it is most likely heated by recent, in-situ star formation. This is the first time dust properties are spatially resolved over several tens of kpc in a galaxy system beyond Cosmic Noon --this is more than six times the scales previously probed in galaxies at those redshifts. |
| title | Spatially resolved dust properties over 50 kpc in a hyperluminous galaxy merger at $z = 4.6$ |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2502.10503 |