Table 1.
Properties of M 105 and NGC 3384 based on broad-band photometry.
| Parameter | Symbol | Value | Ref. |
|---|---|---|---|
| M 105 | |||
| SBF distance (a) | DM 105 | 10.3 Mpc | 1 |
| Effective radius | re, M 105 |
 |
2 |
| Mean ellipticity | ϵM 105 | 0.111 ± 0.005 | 2 |
| Mean position angle | PAM 105 | 70° ±1° | 2 |
| Mean colour | (B − V)M 105 | 0.92 mag | 3 |
| Sérsic index | n | 4 | 2 |
| NGC 3384 | |||
| Distance | D3384 | 11.3 Mpc | 1 |
| Mean colour | (B − V)3384 | 0.88 mag | 3 |
| Spheroid | |||
| Sérsic index | n | 4 | 4 |
| Effective radius | re |
 |
4 |
| Mean ellipticity | ϵspheroid | 0.17 | 4 |
| Mean position angle | PAspheroid |
 |
4 |
| Disc | |||
| Disc radius | rd |
 |
4 |
| Mean ellipticity | ϵdisc | 0.66 | 4 |
| Mean position angle | PAdisc |
 |
4 |
| Inclination | i | 70° | 4 |
Notes.
This SBF distance corresponds to a distance modulus of μSBF = 30.049, which agrees excellently with the distance determined from TRGB magnitudes by Lee & Jang (2016), which is μTRGB = 30.05 ± 0.02 (random)±0.12 (systematic).
References. (1) Tonry et al. (2001); (2) Capaccioli et al. (1990); (3) Watkins et al. (2014); (4) Cortesi et al. (2013b).
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