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Table 1

NGC 4636 basic data.

NGC 4636 basic data

Other names UGC 07878, VCC 1939 NED

Position (2000) NED
190.707792   2.687778
Galactic coordinates l = 297.75°    b = 65.47°

Galactic extinction AB = 0.050 (1)
AB = 0.118 (2)

Distance D = 17.5   Mpc (Sect. 1)
Scale 1′′= 85 pc    1′= 5.09 kpc
Distance modulus (m − M) = 31.22

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 (4)

Age 13.5    ± 3.6   Gyr (5)
Metallicity Z = 0.023 ± 0.006 (5)
α/Fe  [α/Fe]  = 0.29 ± 0.06 (5)

Total blue mag bT = 9.78 (6)
Absolute blue mag BT =  −21.05

Colours U − B = 0.50 (6)
B − V = 0.87
V − R = 0.67
V − I = 1.30

Stellar pop M/L M/LI = 3.74 (7)
Dynamical M/L M/LB = 12.2 (8)

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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