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3. Dark Matter I. Aretxaga
 

Summary: 3. Dark Matter
I. Aretxaga
2010
Evidence for DM in galaxies: rotational curves
Evidence for DM in galaxies: rotational curves
Evidence for DM in galaxies: rotational curves
Evidence for DM in galaxies: rotational curves
(Rubin et al. 1978)
As Sofue & Rubin (2001) recount: flat curves first detected through
HI (Roberts & Rots 1973), and theoreticians predicted them (e.g.
Ostriker & Peebles 1973) . Faber & Gallager (1979) reviewed why
DM halos should be common around spiral galaxies.
In the most extreme cases the curve can be flat to ~100 kpc
M/L~10 ±2 M / L inside 20 kpc .
M~1014M for Sp with v~250 km/s (1013M for MW)
Evidence for DM in galaxies: rotational curves
(Matthewson et al. 1992)
Not all spirals have flat rotation curves, but declining rotational curves
are only a few cases (Sofue & Rubin 2001, ARAA)
Evidence for DM in galaxies: rotational curves

  

Source: Aretxaga, Itziar - Instituto Nacional de Astrofísica Óptica y Electrónica

 

Collections: Physics