The radio-loud quasar SDSS J114657.79+403708.6 at a redshift z = 5.0 is one of the most distant radio-loud objects. The IR-optical luminosity and spectrum suggest that its black hole has a very large mass:M= (5 ± 1) × 109M⊙. The radio-loudness (ratio of the radio to optical flux) of the source is large (around 100), suggesting that the source is viewed at small angles from the jet axis, and could be a blazar. The X-ray observations fully confirm this hypothesis, due to the high level and hardness of the flux. This makes SDSS J114657.79+403708.6 the third most distant blazar known, after Q0906+693 (z = 5.47) and B2 1023+25 (z = 5.3). Among those, SDSS J114657.79+403708.6 has the largest black holemass, setting interesting constraints on the mass function of heavy (>109M⊙) black holes at high redshifts. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Ghisellini, G., Sbarrato, T., Tagliaferri, G., Foschini, L., Tavecchio, F., Ghirlanda, G., et al. (2014). SDSS J114657.79+403708.6: The third most distant blazar at z = 5.0. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. LETTERS, 440(1), L111-L115 [10.1093/mnrasl/slu032].

SDSS J114657.79+403708.6: The third most distant blazar at z = 5.0

GHISELLINI, GABRIELE
;
SBARRATO, TULLIA
Secondo
;
Ghirlanda, G;
2014

Abstract

The radio-loud quasar SDSS J114657.79+403708.6 at a redshift z = 5.0 is one of the most distant radio-loud objects. The IR-optical luminosity and spectrum suggest that its black hole has a very large mass:M= (5 ± 1) × 109M⊙. The radio-loudness (ratio of the radio to optical flux) of the source is large (around 100), suggesting that the source is viewed at small angles from the jet axis, and could be a blazar. The X-ray observations fully confirm this hypothesis, due to the high level and hardness of the flux. This makes SDSS J114657.79+403708.6 the third most distant blazar known, after Q0906+693 (z = 5.47) and B2 1023+25 (z = 5.3). Among those, SDSS J114657.79+403708.6 has the largest black holemass, setting interesting constraints on the mass function of heavy (>109M⊙) black holes at high redshifts. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Articolo in rivista - Articolo scientifico
Active-quasars; Galaxies; General; General-X-rays; Astronomy and Astrophysics; Space and Planetary Science
English
2014
440
1
L111
L115
none
Ghisellini, G., Sbarrato, T., Tagliaferri, G., Foschini, L., Tavecchio, F., Ghirlanda, G., et al. (2014). SDSS J114657.79+403708.6: The third most distant blazar at z = 5.0. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. LETTERS, 440(1), L111-L115 [10.1093/mnrasl/slu032].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/92313
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