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Home All issues Volume 705 (January 2026) A&A, 705 (2026) A199 Full HTML
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Table 1

Radii of the maximum dust surface density measured in scattered light (second column) and in the ALMA continuum (third and fifth columns) together with the corresponding relative offset (fourth and sixth columns).

Name Scatt. light au ALMA (franka) au Rel. offset % ALMA (double power law) au Rel. offset %
Disc with no detectable offset in scattered light
HD 197481 32.6 ± 0.6 36.4−2.5+2.0$\[36.4_{-2.5}^{+2.0}\]$ (b) −10.5−5.1+6.4$\[-10.5_{-5.1}^{+6.4}\]$ 31.8−0.6+1.1$\[31.8_{-0.6}^{+1.1}\]$ 2.6 ± 3.2
HD 39060 91.8−1.9+1.7$\[91.8_{-1.9}^{+1.7}\]$ 100.9−63.7+34.7$\[100.9_{-63.7}^{+34.7}\]$ −9−31+34$\[-9_{-31}^{+34}\]$ 114.6 ± 5.0 −20.0 ± 4.0
TYC 9340-437-1 90.0 ± 4.9 91.9−15.9+15.6$\[91.9_{-15.9}^{+15.6}\]$ −2 ± 17 97.8−7.0+6.0$\[97.8_{-7.0}^{+6.0}\]$ −7.9 ± 7.8
HD 109573 75.6 ± 0.1 75.7 ± 1.1 0.0 ± 1.4 76.7−0.4+0.3$\[76.7_{-0.4}^{+0.3}\]$ −1.4 ± 0.5
HD 92945 56.1−1.9+4.4$\[56.1_{-1.9}^{+4.4}\]$ 56.5−3.5+4.6$\[56.5_{-3.5}^{+4.6}\]$ −0.7−8.8+10.0$\[-0.7_{-8.8}^{+10.0}\]$ 53.3−1.2+1.3$\[53.3_{-1.2}^{+1.3}\]$ 6.8−4.2+8.7$\[6.8_{-4.2}^{+8.7}\]$
HD 10647 87.3 ± 0.1 86.0−1.6+4.6$\[86.0_{-1.6}^{+4.6}\]$ 1.5−5.5+1.9$\[1.5_{-5.5}^{+1.9}\]$ 75.6−0.5+1$\[75.6_{-0.5}^{+1}\]$ 16.9 ± 1.2
HD 15115 100.9−4.0+3.8$\[100.9_{-4.0}^{+3.8}\]$ 96.3 ± 1.6 4.7−4.6+4.3$\[4.7_{-4.6}^{+4.3}\]$ 99.5 ± 0.4 1.3−4.1+3.8$\[1.3_{-4.1}^{+3.8}\]$
HD 107146 131.3−1.8+2.7$\[131.3_{-1.8}^{+2.7}\]$ 112.1−5.6+19.9$\[112.1_{-5.6}^{+19.9}\]$ 17.1−20.8+6.4$\[17.1_{-20.8}^{+6.4}\]$ NA NA
Discs with an outward offset > 1σ in scattered light
HD 121617 80.6−1.1+1.4$\[80.6_{-1.1}^{+1.4}\]$ 73.6−2.0+3.6$\[73.6_{-2.0}^{+3.6}\]$ 9.6−5.6+3.5$\[9.6_{-5.6}^{+3.5}\]$ 69.6−0.5+0.7$\[69.6_{-0.5}^{+0.7}\]$ 15.8 ± 2.1
HD 131488 98.7 ± 3.6 89.1−1.4+1.6$\[89.1_{-1.4}^{+1.6}\]$ 10.8−4.3+4.6$\[10.8_{-4.3}^{+4.6}\]$ 89.7+0.4−0.3$\[89.7^{+0.4_{-0.3}}\]$ 10 ± 4
HD 145560 86.6 ± 2.5 75.6−4.4+4.2$\[75.6_{-4.4}^{+4.2}\]$ 14.5−7.2+7.5$\[14.5_{-7.2}^{+7.5}\]$ 73.8 ± 1.2 16.2 ± 3.9
HD 32297 133.3 ± 2.1 108.4−2.2+1.9$\[108.4_{-2.2}^{+1.9}\]$ 23.0−2.9+3.2$\[23.0_{-2.9}^{+3.2}\]$ 106.6−0.5+0.7$\[106.6_{-0.5}^{+0.7}\]$ 25.0 ± 2.1
HD 9672 159.4 ± 19 102.3 ± 11 55.8−24.4+25.8$\[55.8_{-24.4}^{+25.8}\]$ 106.1 ± 4 49.3 ± 19
HD 131835 112.2−3.2+3.6$\[112.2_{-3.2}^{+3.6}\]$ 65.4−2.1+4.0$\[65.4_{-2.1}^{+4.0}\]$ 71.5−11.6+7.8$\[71.5_{-11.6}^{+7.8}\]$ 61.9 ± 1 81 ± 7
Disc with an inward offset > 1σ in scattered light
HD 61005 59.7−2.4+2.7$\[59.7_{-2.4}^{+2.7}\]$ 69.5−2.8+2.5$\[69.5_{-2.8}^{+2.5}\]$ −14.1−4.6+5.2$\[-14.1_{-4.6}^{+5.2}\]$ 66.2 ± 0.6 −10.3 ± 3.4

Notes. Relative offsets are with respect to ALMA, and a positive offset indicates the scattered light surface density peaks at a larger distance. The discs are grouped in three categories, within which they are sorted with increasing relative offsets. The six discs with a CO detection are indicated with grey shading. (a)For β Pic, the rave profile was used instead of frank (see text for details). (b)For HD 197481, ALMA (frank) reveals two peaks. The maximum surface density is in the second peak, which is the value provided here, and it explains the negative offset. (c)For HD 107146, ALMA (frank) also displays three peaks, the offset is computed relative to the third peak, which corresponds to the ring seen in scattered light.

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