Details

Autor(en) / Beteiligte

• Reid, M. J
• Menten, K. M
• Zheng, X. W
• Brunthaler, A
• Xu, Y

Titel

A Trigonometric Parallax of Sgr B2

Ist Teil von

• The Astrophysical journal, 2009-11, Vol.705 (2), p.1548-1553

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2009

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We have measured the positions of H2O masers in Sgr B2, a massive star-forming region in the Galactic center, relative to an extragalactic radio source with the Very Long Baseline Array. The positions measured at 12 epochs over a time span of one year yield the trigonometric parallax of Sgr B2 and hence a distance to the Galactic center of R 0 = 7.9+0.8 -0.7 kpc. The proper motion of Sgr B2 relative to Sgr A* suggests that Sgr B2 is 0.13 kpc nearer than the Galactic center, assuming a low-eccentricity Galactic orbit.