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Home All issues Volume 498 / No 1 (April IV 2009) A&A, 498 1 (2009) 95-107 Full HTML
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Table 1:

A not complete overview of recent values of parameters describing the GB, its bar and the distance to the GC.
Reference R0 am a0 1:$\eta$:$\zeta$ $\phi$ Based on
  [kpc] [kpc] [pc]   [$^\circ$]  
Fernley et al. (1987) 8.0 $\pm$ 0.65         RR Lyrae stars
Reid et al. (1988) 7.1 $\pm$ 1.5         H2O maser spots
Whitelock (1992) 9.1     1:0.25:0.25 45 Mira variables
Dwek et al. (1995)       1:0.33 $\pm$ 0.11:0.23 $\pm$ 0.08 20 $\pm$ 10 COBE/DIRBE
            surface brightness map
Binney et al. (1997)   1.9 100 1:0.6:0.4 20 COBE/DIRBE
            surface brightness map
Feast (1997) 8.1 $\pm$ 0.4         RR Lyrae stars
Stanek et al. (1997)       1:0.43:0.29 20-30 red clump stars
Freudenreich (1998)   2.6       DIRBE full-sky surface
            brightness map
Paczynski & Stanek (1998) 8.4 $\pm$ 0.4         red clump stars
Udalski (1998) 8.1 $\pm$ 0.15         RR Lyrae stars
Udalski (1998) 8.1 $\pm$ 0.06         red clump stars
Sevenster et al. (1999)   2.5     44 OH/IR stars
Bissantz & Gerhard (2002)   2.8 100 1:(0.3-0.4):0.3 20-25 COBE/DIRBE
            L-band map
Eisenhauer et al. (2003) 7.94 $\pm$ 0.42         stars orbiting black hole
Robin et al. (2003)       1:0.27:0.27 11.1 $\pm$ 0.7 Hipparcos data
Merrifield (2004)       1:0.6:0.4 25 H I gas and COBE/DIRBE
            surface brightness map
Babusiaux & Gilmore (2005) 7.7 $\pm$ 0.15       22 $\pm$ 5.5 red clump stars
Eisenhauer et al. (2005) 7.62 $\pm$ 0.32         stars orbiting black hole
Groenewegen & Blommaert (2005) 8.8 $\pm$ 0.4       47 Mira variables
López-Corredoira et al. (2005)       1:0.5:0.4 20-35 2MASS star counts
Nishiyama et al. (2006) 7.51 $\pm$ 0.10 $\pm$ 0.35         red clump stars
López-Corredoira et al. (2007)         43 red clump stars
Rattenbury et al. (2007)       1:0.35:0.26 24-27 red clump stars
Ghez et al. (2008) 8.0 $\pm$ 0.4         stars orbiting black hole
Gillessen et al. (2009) 8.33 $\pm$ 0.35         stars orbiting black hole

Source LaTeX | All tables | In the text

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