SIMBAD references

2018MNRAS.476.2421G - Mon. Not. R. Astron. Soc., 476, 2421-2431 (2018/May-2)

Extended and broad Ly α emission around a BAL quasar at z ∼ 5.

GINOLFI M., MAIOLINO R., CARNIANI S., ARRIGONI BATTAIA F., CANTALUPO S. and SCHNEIDER R.

Abstract (from CDS):

In this work we report deep MUSE observations of a broad absorption line (BAL) quasar at z ∼ 5, revealing a Ly α nebula with a maximum projected linear size of ∼60 kpc around the quasar (down to our 2σ SB limit per layer of ∼9×10–19ergs–1 cm–2 arcsec–2 for a 1 arcsec2 aperture). After correcting for the cosmological surface brightness dimming, we find that our nebula, at z ∼ 5, has an intrinsically less extended Ly α emission than nebulae at lower redshift. However, such a discrepancy is greatly reduced when referring to comoving distances, which take into account the cosmological growth of dark matter (DM) haloes, suggesting a positive correlation between the size of Ly α nebulae and the sizes of DM haloes/structures around quasars. Differently from the typical nebulae around radio-quiet non-BAL quasars, in the inner regions (∼10 kpc) of the circumgalactic medium of our source, the velocity dispersion of the Ly α emission is very high (FWHM > 1000 km s–1), suggesting that in our case we may be probing outflowing material associated with the quasar.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: haloes - intergalactic medium - quasars: emission lines - quasars: general - cosmology: observations

Simbad objects: 3

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2021.10.28-01:19:13

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