Table A.2
Morphological parameters of the extracted NGA intensity profiles.
| Parameter | Definition | g(r′) ref. | K & L (2019) | Farnocchia et al. (2021) | Bologna (2024) |
|---|---|---|---|---|---|
| Amax | Peak amplitude: the maximum value of the extracted NGA intensity profile (10−10 au d−2). | 6.08 | 6.76 | 7.81 | 6.97 |
| tpeak (days) | Peak timing: the epoch at which the intensity reaches its maximum. | 23.00 | 12.00 | 22.00 | 15.25 |
| T0.1L (days) | Rise duration (10%): interval from 10% of the peak to the peak on the rising branch. | −91.35 | −62.15 | −62.01 | −75.19 |
| T0.1R (days) | Decay duration (10%): interval from the peak to 10% of the peak on the decaying branch. | 137.52 | 145.47 | 118.65 | 117.99 |
| T0.1 (days) | Total duration (10%): time span during which activity remains above 10% of the peak. | 228.87 | 207.62 | 180.66 | 193.19 |
| FWHM (days) | Full width at half maximum: time span during which the intensity remains above 50% of the peak. | 109.65 | 94.73 | 91.96 | 86.09 |
| Asym | Profile asymmetry: a metric quantifying the asymmetry of the profile shape based on the FWHM. | ~0 | 0.11 | 0.04 | 0.03 |
| τrise | Characteristic rise timescale: the e-folding time for activity onset. | 67.71 | 49.95 | 52.49 | 51.59 |
| τdecay | Characteristic decay timescale: the e-folding time for activity decline. | 67.88 | 67.67 | 58.71 | 55.04 |
| τratio | Persistence ratio: the ratio τdecay/τrise, measuring post-perihelion persistence. | ~1.00 | 1.35 | 1.12 | 1.07 |
Notes. The parameters are derived for the three post-Rosetta ephemerides and compared with the delayed sublimation reference curve g(r′). They include the peak amplitude (Amax), peak timing (tpeak), effective activity duration (T0.1 and FWHM), profile asymmetry (Asym), and the characteristic rise and decay timescales (τrise and τdecay). The ratio τratio = τdecay/τrise provides a compact measure of post- to pre-perihelion persistence of activity.
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