JWST/NIRCam observations of HD 92945 debris disk: An asymmetric disk with a gap

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Volume 704 (December 2025)

A&A, 704 (2025) A176

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Table 2

Disk parameters for HD 92945.

	NIRCam-F200W			ALMA
	Single Ref	PSF Lib	PSF Lib + Mask
r_in (au)	${55.1}_{- 1.4}^{+ 1.6}$ $55.1^{+1.6}_{-1.4}$	${57.4}_{- 2.8}^{+ 3.0}$ $57.4^{+3.0}_{-2.8}$	${58.8}_{- 2.6}^{+ 3.3}$ $58.8^{+3.3}_{-2.6}$	${50.3}_{- 2.4}^{+ 3.0}$ $50.3^{+3.0}_{-2.4}$
r_out (au)	${101.1}_{- 1.0}^{+ 1.0}$ $101.1^{+1.0}_{-1.0}$	${98.4}_{- 1.9}^{+ 1.9}$ $98.4^{+1.9}_{-1.9}$	${97.7}_{- 3.6}^{+ 2.9}$ $97.7^{+2.9}_{-3.6}$	${128.3}_{- 14.4}^{+ 7.3}$ $128.3^{+7.3}_{-14.4}$
γ	$- {0.6}_{- 0.1}^{+ 0.1}$ $-0.6^{+0.1}_{-0.1}$	$- {0.2}_{- 0.2}^{+ 0.1}$ $-0.2^{+0.1}_{-0.2}$	$- {0.6}_{- 0.2}^{+ 0.3}$ $-0.6^{+0.3}_{-0.2}$	$- {0.6}_{- 0.7}^{+ 0.6}$ $-0.6^{+0.6}_{-0.7}$
l_in	${17.7}_{- 0.8}^{+ 1.0}$ $17.7^{+1.0}_{-0.8}$	${22.2}_{- 1.9}^{+ 1.6}$ $22.2^{+1.6}_{-1.9}$	${18.8}_{- 1.6}^{+ 1.9}$ $18.8^{+1.9}_{-1.6}$	${6.1}_{- 2.8}^{+ 2.3}$ $6.1^{+2.3}_{-2.8}$
l_out	${6.2}_{- 0.8}^{+ 1.0}$ $6.2^{+1.0}_{-0.8}$	${7.5}_{- 1.4}^{+ 1.6}$ $7.5^{+1.6}_{-1.4}$	${10.7}_{- 2.4}^{+ 2.6}$ $10.7^{+2.6}_{-2.4}$	${24.9}_{- 7.6}^{+ 8.0}$ $24.9^{+8.0}_{-7.6}$
δ_g	${0.72}_{- 0.04}^{+ 0.04}$ $0.72^{+0.04}_{-0.04}$	${0.77}_{- 0.04}^{+ 0.03}$ $0.77^{+0.03}_{-0.04}$	${0.79}_{- 0.05}^{+ 0.04}$ $0.79^{+0.04}_{-0.05}$	${0.73}_{- 0.10}^{+ 0.08}$ $0.73^{+0.08}_{-0.10}$
r_g (au)	${80.9}_{- 0.6}^{+ 0.6}$ $80.9^{+0.6}_{-0.6}$	${81.4}_{- 1.0}^{+ 0.9}$ $81.4^{+0.9}_{-1.0}$	${79.8}_{- 0.97}^{+ 1.1}$ $79.8^{+1.1}_{-0.97}$	${73.7}_{- 1.7}^{+ 1.8}$ $73.7^{+1.8}_{-1.7}$
w_g (au)	${31.0}_{- 2.9}^{+ 3.3}$ $31.0^{+3.3}_{-2.9}$	${28.6}_{- 2.4}^{+ 2.9}$ $28.6^{+2.9}_{-2.4}$	${26.5}_{- 3.0}^{+ 3.8}$ $26.5^{+3.8}_{-3.0}$	${27.6}_{- 9.9}^{+ 8.7}$ $27.6^{+8.7}_{-9.9}$
h	${0.085}_{- 0.011}^{+ 0.011}$ $0.085^{+0.011}_{-0.011}$	${0.087}_{- 0.01}^{+ 0.012}$ $0.087^{+0.012}_{-0.01}$	${0.077}_{- 0.011}^{+ 0.010}$ $0.077^{+0.010}_{-0.011}$	${0.043}_{- 0.014}^{+ 0.014}$ $0.043^{+0.014}_{-0.014}$
pa °	$- {79.2}_{- 0.1}^{+ 0.1}$ $-79.2^{+0.1}_{-0.1}$	$- {79.3}_{- 0.2}^{0.2}$ $-79.3^{0.2}_{-0.2}$	$- {79.3}_{- 0.2}^{+ 0.2}$ $-79.3^{+0.2}_{-0.2}$	$- {80.0}_{- 0.6}^{+ 0.6}$ $-80.0^{+0.6}_{-0.6}$
incl °	${63.7}_{- 0.2}^{+ 0.2}$ $63.7^{+0.2}_{-0.2}$	${63.2}_{- 0.2}^{+ 0.2}$ $63.2^{+0.2}_{-0.2}$	${64.9}_{- 0.4}^{+ 0.4}$ $64.9^{+0.4}_{-0.4}$	${65.4}_{- 0.6}^{+ 0.6}$ $65.4^{+0.6}_{-0.6}$
g₁	${0.74}_{- 0.01}^{+ 0.01}$ $0.74^{+0.01}_{-0.01}$	${0.72}_{- 0.01}^{+ 0.01}$ $0.72^{+0.01}_{-0.01}$	${0.87}_{- 0.06}^{+ 0.05}$ $0.87^{+0.05}_{-0.06}$
g₂	$- {0.10}_{- 0.01}^{+ 0.01}$ $-0.10^{+0.01}_{-0.01}$	$- {0.16}_{- 0.02}^{+ 0.01}$ $-0.16^{+0.01}_{-0.02}$	$- {0.17}_{- 0.03}^{+ 0.03}$ $-0.17^{+0.03}_{-0.03}$
w_g₁	${0.699}_{- 0.004}^{+ 0.004}$ $0.699^{+0.004}_{-0.004}$	${0.714}_{- 0.006}^{+ 0.004}$ $0.714^{+0.004}_{-0.006}$	${0.83}_{- 0.06}^{+ 0.06}$ $0.83^{+0.06}_{-0.06}$
F	${5.2}_{- 0.1}^{+ 0.1}$ $5.2^{+0.1}_{-0.1}$	${5.0}_{- 0.1}^{+ 0.1}$ $5.0^{+0.1}_{-0.1}$	${8.1}_{- 0.8}^{+ 0.9}$ $8.1^{+0.9}_{-0.8}$

Notes. Disk parameters for HD 92945 at 2 μm and comparison with ALMA results (Marino 2021). For F200W filter we show the results obtained from MCMC simulations for a single reference (HD 92921), the entire PSF library and the PSF library plus a mask to exclude the bright region close to the minor axis, as shown in the last row of Figure 2. Except for l_out, the values for the F444W filter were assumed to be the same as those derived for the F200W filter, as detailed in Section 3.2.

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