GA-NIFS and EIGER: A merging quasar host at z = 7 with an overmassive black hole

Home

All issues

Volume 702 (October 2025)

A&A, 702 (2025) A50

Full HTML

Open Access

Table 2.

Dynamical masses and values used in their calculation for the quasar host and companion galaxy.

	R	σ	b/a	i	M_dyn, disp	M_dyn, rot	M_dyn, vir
	(kpc)	(km/s)		(deg)	(10¹⁰ M_⊙)
Region 1 (Host)	1.93 ± 0.03	88 ± 49	0.40 ± 0.01	66 ± 1	0.5 $_{- 0.4}^{+ 0.8}$ $^{+0.8}_{-0.4}$	1.3 $_{- 1.1}^{+ 1.9}$ $^{+1.9}_{-1.1 }$	1.7 $_{- 1.4}^{+ 2.6}$ $^{+2.6}_{-1.4}$
Region 2 (Companion)	1.83 ± 0.02	104 ± 49	0.42 ± 0.01	65 ± 1	0.7 $_{- 0.5}^{+ 0.8}$ $^{+0.8}_{-0.5}$	1.8 $_{- 1.3}^{+ 2.1}$ $^{+2.1}_{-1.3 }$	2.3 $_{- 1.7}^{+ 2.8}$ $^{+2.8}_{-1.7}$

Notes. Three dynamical masses are calculated, assuming that the galaxies are dispersion dominated, M_dyn, disp, rotation dominated, M_dyn, rot, or virialised, M_dyn, vir–our best estimate is the rotation dominated measurement. Here, R is the Sérsic radius found in the best fit to the [O III] λ5007 emission from psfMC. The axis ratio b/a is also measured from this Sérsic fit, with the inclination of the galaxy i calculated as cos(i)=b/a. The intrinsic integrated line velocity dispersion σ is taken from the [O III] λ5007 line properties given in Table 1.

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.