G321.3–3.9: A new supernova remnant observed with multi-band radio data and in the SRG/eROSITA All-Sky Surveys

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Volume 690 (October 2024)

A&A, 690 (2024) A278

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Table 2

Best fit parameters with 1σ errors obtained with different models; O, Ne, Mg, Si, and Fe were left free to vary.

Model	`vpshock`	`vapec`	`vnei`
N_H (10²² cm⁻²)	${0.15}_{- 0.03}^{+ 0.04}$ $\[0.15_{-0.03}^{+0.04}\]$	${0.11}_{- 0.02}^{+ 0.02}$ $\[0.11_{-0.02}^{+0.02}\]$	${0.12}_{- 0.02}^{+ 0.03}$ $\[0.12_{-0.02}^{+0.03}\]$
kT (keV)	${0.65}_{- 0.03}^{+ 0.03}$ $\[0.65_{-0.03}^{+0.03}\]$	${0.58}_{- 0.02}^{+ 0.02}$ $\[0.58_{-0.02}^{+0.02}\]$	${0.58}_{- 0.03}^{+ 0.02}$ $\[0.58_{-0.03}^{+0.02}\]$
O/O_⊙	${0.17}_{- 0.05}^{+ 0.08}$ $\[0.17_{-0.05}^{+0.08}\]$	${0.18}_{- 0.11}^{+ 0.15}$ $\[0.18_{-0.11}^{+0.15}\]$	${0.08}_{- 0.08}^{+ 0.08}$ $\[0.08_{-0.08}^{+0.08}\]$
Ne/Ne_⊙	<0.05	${0.3}_{- 0.12}^{+ 0.18}$ $\[0.3_{-0.12}^{+0.18}\]$	${0.17}_{- 0.06}^{+ 0.08}$ $\[0.17_{-0.06}^{+0.08}\]$
Mg/Mg_⊙	<0.05	<0.05	${0.06}_{- 0.06}^{+ 0.09}$ $\[0.06_{-0.06}^{+0.09}\]$
Si/Si_⊙	${0.6}_{- 0.2}^{+ 0.2}$ $\[0.6_{-0.2}^{+0.2}\]$	${0.51}_{- 0.23}^{+ 0.14}$ $\[0.51_{-0.23}^{+0.14}\]$	${0.6}_{- 0.2}^{+ 0.3}$ $\[0.6_{-0.2}^{+0.3}\]$
Fe/Fe_⊙	${0.5}_{- 0.1}^{+ 0.2}$ $\[0.5_{-0.1}^{+0.2}\]$	${0.30}_{- 0.05}^{+ 0.07}$ $\[0.30_{-0.05}^{+0.07}\]$	${0.37}_{- 0.07}^{+ 0.09}$ $\[0.37_{-0.07}^{+0.09}\]$
τ_u (10¹⁰ cm⁻³ s)	$51_{- 26}^{+ 75}$ $\[51_{-26}^{+75}\]$	−	$17_{- 4}^{+ 11}$ $\[17_{-4}^{+11}\]$
Normalization	${0.018}_{- 0.005}^{+ 0.007}$ $\[0.018_{-0.005}^{+0.007}\]$	${0.023}_{- 0.005}^{+ 0.005}$ $\[0.023_{-0.005}^{+0.005}\]$	${0.019}_{- 0.004}^{+ 0.005}$ $\[0.019_{-0.004}^{+0.005}\]$

Statistics	1756/1597=1.10	1794/1602=1.12	1790/1601=1.12

Notes. All models include absorption (TBabs). Normalization is expressed as $10^{- 14} \frac{\int n_{e} n_{H} d V}{4 π D^{2}}$ $\[10^{-14} \frac{\int n_e n_H d V}{4 \pi D^2}\]$ , where n_e is the electron density of the plasma (cm⁻³), n_H is the hydrogen density (cm⁻³), and D (cm) is the distance of the source.

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