Statistical analysis of Al III and C III] emission lines as virial black hole mass estimators in quasars

Home

All issues

Volume 669 (January 2023)

A&A, 669 (2023) A135

Full HTML

Open Access

Table 2.

UV diagnostic ratios of MS14 values obtained on an average composite for all Pop. B sources with different considerations for the Al III, C III], and Si III] profile lines.

	M1	M2	M3	M4
	(^a)	(^b)	(^c)	(^d)
Al III BC/ Si III]BC	0.62± 0.19	0.65±0.39	0.61±0.06	0.37±0.73
C III]BC/ Si III]BC	1.34±0.25	1.28±0.32	1.16±0.07	1.39±0.79
Al III BC/ C III] BC	0.46±0.14	0.51±0.28	0.53±0.08	0.27±0.78
Al III VBC / Si III]VBC	–	–	0.42±0.06	0.19±3.95
C III]VBC / Si III]VBC	–	–	2.87±0.07	1.65±2.23
Al III VBC+BC / Si III]BC+VBC	–	–	0.58±0.12	0.32±1.10
C III]VBC+BC / Si III]BC+VBC	–	–	1.45±0.14	1.46±0.90
Al III VBC / Al III BC	–	–	0.15±0.03	0.17±2.45
Si III] VBC / Si III] BC	–	–	0.21±0.01	0.33±2.23
C III] VBC / C III] BC	–	–	0.51±0.01	0.39±0.79
χ²	0.11994	0.01146	0.01084	1.05202
FWHM C III] BC	5356	5075	5299	5299
FWHM Si III] BC	5704	5416	5444	5444
FWHM Al III BC	5708	5578	5674	5674
FWHM VBC	–	7024	7128	7128

Notes.

^(a)

Model 1: Fit with only BCs as shown in Fig. 5 (top panel).

^(b)

Model 2: Fit with only a VBC in C III] as described in Sect. 3.2 (Fig. 3, bottom panel).

^(c)

Model 3: Fit with BC + VBCs in all three lines, as in Fig. 15, panel a.

^(d)

Model 4: Synthetic model fit with BC+VBC in all three lines, as in Fig. 15, panel b.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.