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 withMUse: 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 followedup 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 newsensitive 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.

Battaia, F., Prochaska, J., Hennawi, J., 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(3), 3907-3940 [10.1093/mnras/stx2465].

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

Cantalupo S.;
2018

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 withMUse: 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 followedup 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 newsensitive 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.
Articolo in rivista - Articolo scientifico
Cosmology: observations; Galaxies: haloes; Galaxies: high-redshift; Intergalactic medium; Quasars: emission lines; Quasars: general;
English
2018
473
3
3907
3940
none
Battaia, F., Prochaska, J., Hennawi, J., 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(3), 3907-3940 [10.1093/mnras/stx2465].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/372613
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