Table 2
Properties of the dust clouds around Antares.
| ID | r | r | PA | I peak | Flux | T d | M d | r(1998) | Δr | V |
| (′′) | (R⋆) | (°) | (Jy arcsec-2) | (Jy) | (K) | ( M⊙) | (′′) | (′′) | (km s-1) | |
|
|
||||||||||
| A | 1.8 | 96 | 115 | 23.4 ± 3.9 | 14.0 ± 2.3 | 280 | 5 × 10-9 | 1.3 | 0.5 ± 0.1 | 34 ± 7 |
| B1 | 1.0 | 53 | 17 | 50.8 ± 7.8 | 16.5 ± 2.2 | 370 | 3 × 10-9 | 0.4 | 0.6 ± 0.1 | 40 ± 7 |
| B2 | 1.3 | 69 | 353 | 36.7 ± 5.4 | 25.0 ± 3.7 | 320 | 5 × 10-9 | 1.0 | 0.2 ± 0.1 | 13 ± 7 |
| C | 0.8 | 40 | 289 | 61.9 ± 22.2 | 27.7 ± 10.9 | 430 | 3 × 10-9 | – | – | – |
| D | 0.8 | 40 | 213 | 60.8 ± 21.0 | 29.5 ± 9.5 | 430 | 3 × 10-9 | – | – | – |
| E | 1.5 | 78 | 189 | 28.9 ± 5.3 | 16.0 ± 2.4 | 310 | 4 × 10-9 | 1.0 | 0.5 ± 0.1 | 34 ± 7 |
| F | 0.5a | 27a | — | 135.0 ± 31.8 | 87.6 ± 30.2 | 550 | 6 × 10-9 | – | – | – |
Notes. r: distance from the central star in units of arcseconds and stellar radii. PA: position angle. Ipeak: peak intensity. Flux: flux integrated over each cloud. Td: dust temperature. Md: dust mass. r(1998): distance from the central star in the 20.8 μm image of Marsh et al. (2001) taken in 1998. Δr: angular displacement between 1998 and 2010. V: velocity of the outward motion projected onto the plane of the sky.
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