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Journal Article

Inspiraling halo accretion mapped in Ly α emission around a z ̃ 3 quasar

MPS-Authors

Arrigoni Battaia,  Fabrizio
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Prochaska,  J. Xavier
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hennawi,  Joseph F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Obreja,  Aura
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Buck,  Tobias
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cantalupo,  Sebastiano
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dutton,  Aaron A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Macciò,  Andrea V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018MNRAS.473.3907A
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Citation

Arrigoni Battaia, F., Prochaska, J. X., Hennawi, J. F., Obreja, A., Buck, T., Cantalupo, S., et al. (2018). Inspiraling halo accretion mapped in Ly α emission around a z ̃ 3 quasar. Monthly Notices of the Royal Astronomical Society, 473, 3907-3940.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CF32-A
Abstract
In an effort to search for Ly α emission from circum- and intergalactic gas on scales of hundreds of kpc around z ̃ 3 quasars, and thus characterize the physical properties of the gas in emission, we have initiated an extensive fast survey with the Multi-Unit Spectroscopic Explorer (MUSE): Quasar Snapshot Observations with MUse: Search for Extended Ultraviolet eMission (QSO MUSEUM). In this work, we report the discovery of an enormous Ly α nebula (ELAN) around the quasar SDSS J102009.99+104002.7 at z = 3.164, which we followed-up with deeper MUSE observations. This ELAN spans ̃297 projected kpc, has an average Ly α surface brightness SBLy α ̃ 6.04 × 10-18 erg s-1 cm-2 arcsec-2(within the 2σ isophote) and is associated with an additional four previously unknown embedded sources: two Ly α emitters and two faint active galactic nuclei (one type-1 and one type-2 quasar). By mapping at high significance, the line-of-sight velocity in the entirety of the observed structure, we unveiled a large-scale coherent rotation-like pattern spanning ̃300 km s-1 with a velocity dispersion of <270 km s-1, which we interpret as a signature of the inspiraling accretion of substructures within the quasar's host halo. Future multiwavelength data will complement our MUSE observations and are definitely needed to fully characterize such a complex system. None the less, our observations reveal the potential of new sensitive integral-field spectrographs to characterize the dynamical state of diffuse gas on large scales in the young Universe, and thereby witness the assembly of galaxies.