Carbon envelopes around merging galaxies at z ∼ 4.5

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Volume 690 (October 2024)

A&A, 690 (2024) A255

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Table 1.

Physical parameters of the major merging galaxies selected for this work.

Source ID	z₁	z₂	Δv [km/s]	r_p [kpc]	μ_[CII]	μ_K	Log(M_⋆/M_⊙)	Log(SFR/M_⊙ yr⁻¹)
DC_818760	4.5626	4.5609	92.3	9.9	1.3	2.6	10.85 $_{- 0.10}^{+ 0.11}$ $^{+0.11}_{-0.10}$	2.88 $_{- 0.25}^{+ 0.19}$ $^{+0.19}_{-0.25}$
DC_873321	5.1545	5.1544	4.5	6.5	1.2	3.1	10.18 $_{- 0.16}^{+ 0.13}$ $^{+0.13}_{-0.16}$	2.16 $_{- 0.17}^{+ 0.22}$ $^{+0.22}_{-0.17}$
vc_5100541407	4.5628	4.5628	1.9	13.8	1.6	1.4	10.33 $_{- 0.15}^{+ 0.14}$ $^{+0.14}_{-0.15}$	1.74 $_{- 0.23}^{+ 0.26}$ $^{+0.26}_{-0.23}$
vc_5100822662	4.5210	4.5205	22.3	10.9	1.6	1.7	10.39 $_{- 0.14}^{+ 0.13}$ $^{+0.13}_{-0.14}$	2.02 $_{- 0.24}^{+ 0.23}$ $^{+0.23}_{-0.24}$
vc_5101209780	4.5724	4.5684	217.3	10.8	4.1	2.5	10.27 $_{- 0.12}^{+ 0.12}$ $^{+0.12}_{-0.12}$	1.79 $_{- 0.21}^{+ 0.25}$ $^{+0.25}_{-0.21}$
vc_5180966608	4.5294	4.5293	8.9	7.2	3.0	3.7	11.04 $_{- 0.13}^{+ 0.12}$ $^{+0.12}_{-0.13}$	2.35 $_{- 0.25}^{+ 0.27}$ $^{+0.27}_{-0.25}$

Notes. Together with the source ID and redshift estimates for both the components of the merger (z₁ and z₂), we also include the velocity offset (Δv) and projected distance (r_p) between the merger components and the [CII] flux ratio (μ_[CII]) and K_s band flux ratio (μ_K) (Romano et al. 2021). The last two columns include the estimates for stellar masses and star formation rates for the entire merging system as estimated by Faisst et al. (2020) (see their paper for details on the photometry and SED fitting procedure), once we converted the IMF from Chabrier (2003) to Salpeter (1955).

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