Open Access
Table 1.
NGC 4654 general properties.
| Morphological type | SAB(rs)cd |
| Optical diameter | 5.17′×1.41′ |
| Distance | 17 Mpc |
| α(J2000) | 12h 43m 56.6s |
| δ(J2000) | 13° 07′ 36″ |
| Inclination angle | 51° |
| Systemic velocity | 1060 km s−1 |
| Rotational velocity | 170 km s−1 |
| Total SFR (a) | 1.84 M⊙ yr−1 |
| H I mass (b) | 3.4 × 109 M⊙ |
| H2 mass (c) | 2.3 × 109 M⊙ |
| Stellar mass | 2.8 × 1010 M⊙ |
Notes.
(a)
Computed following Leroy et al. (2008) from the 24 μm Spitzer and far-ultraviolet GALEX data.
(b)
Calculated from the VIVA H I data cube (Chung et al. 2008) for a distance of 17 Mpc.
(c)
Calculated using the modified αCO conversion factor presented in Sect. 5.
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