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Table 4
Position angle (PA) determinations by various authors (see Fig. 11 for an illustration).
Author | Refa | Obs date | PA (°) | Wavelength | Regionb |
|
|||||
Lattanzi et al. (1997) | [8] | 1995 Dec. 17 | 143c | 583 nm | inner |
Tuthill et al. (1999) | [7] | 1993 Jun. | 94 ± 33 | 700 and 710 nm | inner |
Ireland et al. (2004a) | − | 2001 Feb. 8/9 | −d | 680–940 nm | inner |
Monnier et al. (2004) | − | 2000 Jan./Feb. | −d | 2.25 μm (K-band) | inner |
this work | [9] | 2007–2009 | 11 ± 20 | 8–12 μm (N-band) | inner |
Reid & Menten (2007) | [6] | 2000 Oct./Nov. | 83 ± 18 | 43 GHz (radio continuum) | inner |
[5] | 2000 Oct./Nov. | contours | 43 GHz (SiO maser) | inner | |
Imai et al. (2010) | [10] | 2009 Feb. | spots | 43 GHz (SiO maser) | inner |
Reid & Menten (1990) | [4] | 1990 Feb. | contours | 22 GHz (H2O maser) | intermediate |
Marengo et al. (2000) | −e | 1999 Jun. | N − S | 18 μm (1.18′′ × 1.45′′FWHM) | outer |
Szymczak et al. (1998) | [1] | 1996 Jan. 15 | N → S | 1667 MHz (OH maser), velocity gradient | outer |
[2] | 1996 Jan. 15 | −20 ± 20f | 1667 MHz (OH maser), magnetic field | outer | |
Muller et al. (2008) | [3] | 2008 Apr. 13/15 | NW → SE | 266 GHz (thermal HCN), velocity gradient | outer |
Vlemmings et al. (2011) | −e | 2008 Jul. 20 | 3 ± 10 | 215 GHz (SO 55 − 44) | outer |
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