Observations by GMRT at 323 MHz of radio-loud quasars at z > 5

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Volume 641 (September 2020)

A&A, 641 (2020) A85

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Table 5.

Radio loudness.

Source	m_z	S_{2500 Å}	S_{4400 Å}	S_{5 GHz}	R_{2500 Å}	R_{4400 Å}
	(mag)	(mJy)	(mJy)	(mJy)
J0131−0321	^(d)18.08	0.046	0.061	6.71	147	111
J0741+2520	^(d)18.44	0.033	0.043	0.40	12	9
J0836+0054	⁽¹⁾18.83	0.022	0.029	0.33	15	11
J0913+5919	^(d)20.81	0.0037	0.0049	2.66	716	540
J1026+2542	^(d)19.85	0.0089	0.012	44.21	4982	3756
J1034+2033	^(d)19.70	0.010	0.014	0.58	56	42
J1146+4037	^(d)19.30	0.015	0.020	1.41	97	74
J1427+3312	⁽¹⁾18.87	0.021	0.027	0.35	17	13
J1429+5447	^(b,1)21.45	0.0019	0.0025	0.60	318	240
J1614+4640	^(d)19.71	0.010	0.013	0.23	23	17
J2228+0110	^(c,1)22.28	0.00089	0.0012	0.07	80	60
J2239+0030	^(d)21.01	0.0031	0.0041	0.23	74	56
J2245+0024	^(a)21.72	0.0016	0.0021	0.26	162	122

Notes. Column 1: source name. Column 2: z band AB magnitude. Columns 3–4: rest-frame 2500 Å and 4400 Å flux density, which are calculated assuming a UV power-law S_ν ∝ ν^−0.5 with z-band photometry data. Column 5: rest-frame 5 GHz flux density that is predicted from our spectral model fit. In the case of J2228+0110 and J2245+0024, the 5 GHz flux density is calculated with 1.4 GHz flux density assuming a power-law S_ν ∝ ν^−0.7. Columns 6–7: radio loudness defined in Eqs. (5) and (6).

⁽¹⁾

z-band magnitude is contaminated by the strong Lyα line emission.

References.

^(a)

Sharp et al. (2001);

^(b)

Frey et al. (2011);

^(c)

Zeimann et al. (2011);

^(d)

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