Table 7
Comparison between observed stand-off distances derived from Herschel/PACS maps and previous studies with IRAS, Spitzer & AKARI.
| Object | De-projected R0 | Ref. | nHa | |||
| this work | literature | (cm-3) | ||||
|
|
||||||
|
|
||||||
|
|
||||||
| observed (′) | predicted (′) | (′) | Eq. (2) | Eq. (5) | ||
|
|
||||||
| o Cet | 1.2 | 0.7/ |
~3 | (1) | 0.4 | 1.1 |
| α Ori | 5.0 | 10.6/ |
~4 | (2) | 4.6 | 1.9 |
| CW Leo | 6.6 | 3.9/ |
5.9 | (3) | 0.3 | 0.7 |
| R Hya | 1.6 | 2.4/ |
1.6 ± 0.1 | (4) | 2.5 | 0.8 |
| R Cas | 1.5 | 2.2/ |
1.4 ± 0.1 | (5) | 2.1 | 1.8 |
Notes.
The last two columns list the ISM density, nH, derived from either Eq. (2) (using known stellar parameters and observed stand-off distance) or Eq. (5) (set by the height above the Galactic plane, z).
References. References: (1) Raga & Cantó (2008); (2) Ueta et al. (2008), Decin et al. (in prep.); (3) Ladjal et al. (2010), Sahai & Chronopoulos (2010); (4) Ueta et al. (2006); (5) Ueta et al. (2010).
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