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Home All issues Volume 693 (January 2025) A&A, 693 (2025) A126 Full HTML
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Table 4.

BH mass scaling for NGC 1566 and NGC 7679.

Reference sources mr (M⊙) ir(a) (deg) Nr, L39/d102 dr(b) (kpc)
NGC 4051 (1) 6×105 50 9 × 10−4 9800
GX 339–4 (2) ∼6 ... 5.1 × 10−2 7.5 ± 1.6
GRO J1655–40 (3) 6.3±0.3 70± 1 5.2 × 10−2 3.2±0.2
Cyg X–1 (4) 6.8–13.3 35±5 0.9 2.5± 0.3
4U 1543–47 (5) ∼11 20.7±1.5 0.12 7.5±1
Target source mt (M⊙) it(a) (deg) dt(b) (Mpc)
NGC 1566 ∼1.9 × (1 ± 0.45)×105 37.5 21.3 Using NGC 4051 as a ref. source
NGC 1566 ∼1.9 × (1 ± 0.45)×105 37.5 21.3 Using GX 339–4 as a ref. source
NGC 1566 ∼1.9 × (1 ± 0.45)×105 37.5 21.3 Using GRO J1655–40 as a ref. source
NGC 1566 ∼1.9 × (1 ± 0.45)×105 37.5 21.3 Using Cyg X–1 as a ref. source
NGC 1566 ∼1.9 × (1 ± 0.45)×105 37.5 21.3 Using 4U 1543–47 as a reference source
NGC 1566 Final estimate 37.52 21.3 As a standard deviation for a mean:
∼1.9 × (1 ± 0.20)×105 0.45/51/2  =  0.20
NGC 7679 ∼8.4 × (1 ± 0.45)×106 30 57.28 Using NGC 4051 as a ref. source
NGC 7679 ∼8.4 × (1 ± 0.45)×106 30 57.28 Using GX 339–4 as a ref. source
NGC 7679 ∼8.4 × (1 ± 0.45)×106 30 57.28 Using GRO J1655–40 as a ref. source
NGC 7679 ∼8.4 × (1 ± 0.45)×106 30 57.28 Using Cyg X–1 as a ref. source
NGC 7679 ∼8.4 × (1 ± 0.45)×106 30 57.28 That using 4U 1543–47 as a reference source
NGC 7679 Final estimate 30 57.28 As a standard deviation for a mean:
∼8.4 × (1 ± 0.20)×106 0.45/51/2  =  0.20
Mrk 3 ∼2.2 × (1 ± 0.45)×108 50 63.2 Using NGC 4051 as a ref. source
Mrk 3 ∼2.2 × (1 ± 0.45)×108 50 63.2 Using GX 339–4 as a ref. source
Mrk 3 ∼2.2 × (1 ± 0.45)×108 50 63.2 Using GRO J1655–40 as a ref. source
Mrk 3 ∼2.2 × (1 ± 0.45)×108 50 63.2 Using Cyg X–1 as a ref. source
Mrk 3 ∼2.2 × (1 ± 0.45)×108 50 63.2 Using 4U 1543–47 as a reference source
Mrk 3 Final estimate 50 63.2 As a standard deviation for a mean:
∼2.2 × (1 ± 0.20)×108 0.45/51/2  =  0.20

Notes.

(a)

System inclination in the literature and

(b)

source distance found in the literature.

(1)Christopoulou et al. (1997), McHardy et al. (2004), Haba et al. (2008), Pounds & King (2013), Lobban et al. (2011), Terashima et al. (2009), Denney et al. (2009), Seifina et al. (2018b); (2)Muñoz-Darias et al. (2008), Hynes et al. (2004); (3)Greene et al. (2001), Hjellming & Rupen (1995); (4)Herrero et al. (1995), Ninkov et al. (1987); and (5)Orosz (2003), Park et al. (2004).

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