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Home All issues Volume 502 / No 1 (July IV 2009) A&A, 502 1 (2009) 91-111 Full HTML
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Table 2:

Measured proper motions, in the infrared frame, of the maser stars used for astrometric alignment.
Name RA [arcsec] Dec [arcsec] $v_{\rm RA}$ [mas yr-1] $v_{\rm Dec}$ [mas yr-1] $\Delta_{\rm radio,IR}$ $v_{\rm RA}$ [mas yr-1] $\Delta_{\rm radio,IR}$ $v_{\rm Dec}$ [mas yr-1]
IRS 15NE $1.226\pm0.015$ $11.327\pm0.024$ $-1.51\pm0.15$ $-5.81\pm0.15$ $-0.46\pm0.17$ $0.13\pm0.19$
IRS 7 $0.046\pm0.010$ $5.569\pm0.016$ $-0.05\pm0.23$ $-4.59\pm0.23$ $-0.53\pm0.55$ $1.07\pm0.59$
IRS 17 $13.143\pm0.019$ $5.566\pm0.030$ $-1.70\pm0.12$ $-1.04\pm0.12$ $0.09\pm1.09$ $0.29\pm1.23$
IRS 10EE $7.688\pm0.012$ $4.220\pm0.020$ $-0.40\pm0.18$ $-1.55\pm0.18$ $0.44\pm0.19$ $-0.55\pm0.19$
IRS 28 $10.477\pm0.016$ $-5.825\pm0.026$ $1.62\pm0.23$ $-4.71\pm0.23$ $0.38\pm0.44$ $-0.57\pm0.48$
IRS 9 $5.672\pm0.013$ $-6.335\pm0.021$ $3.30\pm0.25$ $3.03\pm0.25$ $-0.24\pm0.26$ $-0.92\pm0.31$
IRS 12N $-3.250\pm0.012$ $-6.876\pm0.019$ $-1.62\pm0.22$ $-2.78\pm0.22$ $0.56\pm0.24$ $0.07\pm0.28$
Positions are given for 2004.44 as offsets from Sgr A*, positive toward the north and east. Proper motions are given in milli-arcseconds per year, positive toward north and east. The last two columns list the differences between the radio (Reid et al. 2007) and IR proper motions.

Source LaTeX | All tables | In the text

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