Table 1
NGC 4636 basic data.
| NGC 4636 basic data | ||
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| Other names | UGC 07878, VCC 1939 | NED |
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| Position (2000) |
|
NED |
| 190.707792 2.687778 | ||
| Galactic coordinates | l = 297.75° b = 65.47° | |
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| Galactic extinction | AB = 0.050 | (1) |
| AB = 0.118 | (2) | |
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| Distance | D = 17.5 Mpc | (Sect. 1) |
| Scale | 1′′= 85 pc 1′= 5.09 kpc | |
| Distance modulus | (m − M) = 31.22 | |
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| Heliocentric velocity | νhelio = 906 ± 7 km s-1 | (3) |
| Hubble type | E0+ | R3C |
| Ellipticity | ϵ = 0.15 | (4) |
| Position angle | PA = 150° | R3C |
| Effective radius |
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(4) |
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| Age | 13.5 ± 3.6 Gyr | (5) |
| Metallicity | Z = 0.023 ± 0.006 | (5) |
| α/Fe | [α/Fe] = 0.29 ± 0.06 | (5) |
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| Total blue mag | bT = 9.78 | (6) |
| Absolute blue mag | BT = −21.05 | |
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| Colours | U − B = 0.50 | (6) |
| B − V = 0.87 | ||
| V − R = 0.67 | ||
| V − I = 1.30 | ||
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| Stellar pop M/L | M/LI = 3.74 | (7) |
| Dynamical M/L | M/LB = 12.2 | (8) |
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| X-ray luminosity | LX = 1.78 ± 0.10 × 10 41 ergs/s | (9) |
| Nuclear X-ray emission | ≤ 2.7 × 10 38 ergs/s | (10) |
| Central black hole | MSMBH ~ 8 × 10 7 M⊙ | (11) |
Notes. UGC = Uppsala General Catalogue of Galaxies (Nilson 1973), VCC = Virgo Cluster Catalogue (Binggeli et al. 1985), NED = NASA/IPAC Extragalactic Database (http://nedwww.ipac.caltech.edu), R3C = Third Reference Catalogue of Bright Galaxies (de Vaucouleurs et al. 1991).
References. (1) Burstein & Heiles (1982); (2) Schlegel et al. (1998); (3) Paper I; (4) Bender et al. (1994); (5) Annibali et al. (2007); (6) Prugniel & Heraudeau (1998); (7) Maraston et al. (2003); (8) Kronawitter et al. (2000); (9) Forman et al. (1985); (10) Loewenstein et al. (2001); (11) Merritt & Ferrarese (2001).
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