We present the first comprehensive study of a giant, ≈70 kpc-scale nebula around a radio-quiet quasar at z < 1. The analysis is based on deep integral field spectroscopy with Multi-Unit Spectroscopic Explorer of the field of HE 0238-1904, a luminous quasar at z = 0.6282. The nebula emits strongly in [O ii],, and [O iii], and the quasar resides in an unusually overdense environment for a radio-quiet system. The environment likely consists of two groups which may be merging, and in total have an estimated dynamical mass of Mdyn ≈ 4 × 1013 to 1014 MO. The nebula exhibits largely quiescent kinematics and irregular morphology. The nebula may arise primarily through interaction-related stripping of circumgalactic and interstellar medium (CGM/ISM) of group members, with some potential contributions from quasar outflows. The simultaneous presence of the giant nebula and a radio-quiet quasar in a rich environment suggests a correlation between such circum-quasar nebulae and environmental effects. This possibility can be tested with larger samples. The upper limits on the electron number density implied by the [O ii] doublet ratio range from log(ne,[O,II]/cm-3) < 1.2 to 2.8. However, assuming a constant quasar luminosity and negligible projection effects, the densities implied from the measured line ratios between different ions (e.g. [O ii], [O iii], and [Ne v]) and photoionization simulations are often 10-400 times larger. This large discrepancy can be explained by quasar variability on a time-scale of ≈104-105 yr.

Liu, Z., Johnson, S., Li, J., Rudie, G., Schaye, J., Chen, H., et al. (2024). The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 527(3), 5429-5447 [10.1093/mnras/stad3364].

The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe

Cantalupo, S;
2024

Abstract

We present the first comprehensive study of a giant, ≈70 kpc-scale nebula around a radio-quiet quasar at z < 1. The analysis is based on deep integral field spectroscopy with Multi-Unit Spectroscopic Explorer of the field of HE 0238-1904, a luminous quasar at z = 0.6282. The nebula emits strongly in [O ii],, and [O iii], and the quasar resides in an unusually overdense environment for a radio-quiet system. The environment likely consists of two groups which may be merging, and in total have an estimated dynamical mass of Mdyn ≈ 4 × 1013 to 1014 MO. The nebula exhibits largely quiescent kinematics and irregular morphology. The nebula may arise primarily through interaction-related stripping of circumgalactic and interstellar medium (CGM/ISM) of group members, with some potential contributions from quasar outflows. The simultaneous presence of the giant nebula and a radio-quiet quasar in a rich environment suggests a correlation between such circum-quasar nebulae and environmental effects. This possibility can be tested with larger samples. The upper limits on the electron number density implied by the [O ii] doublet ratio range from log(ne,[O,II]/cm-3) < 1.2 to 2.8. However, assuming a constant quasar luminosity and negligible projection effects, the densities implied from the measured line ratios between different ions (e.g. [O ii], [O iii], and [Ne v]) and photoionization simulations are often 10-400 times larger. This large discrepancy can be explained by quasar variability on a time-scale of ≈104-105 yr.
Articolo in rivista - Articolo scientifico
galaxies: groups: general; intergalactic medium; quasars: supermassive black holes;
English
2-nov-2023
2024
527
3
5429
5447
none
Liu, Z., Johnson, S., Li, J., Rudie, G., Schaye, J., Chen, H., et al. (2024). The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 527(3), 5429-5447 [10.1093/mnras/stad3364].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/468849
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