Table 2
Observed and derived parameters of Sextans B.
| Parameter | Value | Notes |
|
|
||
| α 0 | 10:00:00.05 | J2000a |
| δ 0 | +05:19:56.4 | J2000a |
| l 0 | 233.20° | Gal. long. |
| b 0 | 43.78° | Gal. lat. |
| SGL | 95.46° | Supergal. long. |
| SGB | −39.62° | Supergal. lat. |
| E(B −V) | 0.024 ± 0.003 | Average ± σb |
| (m − M)0 | 25.80 ± 0.12 | |
| D | 1.44 ± 0.08 Mpc | |
| 1 arcsec | 7.0 pc | conv. factor at D = 1.44 Mpc |
| V h | 304 ± 1 km s-1 | heliocentric velocityc |
| V g | 171 km s-1 | galactocentric velocityc |
| ⟨[Fe/H] ⟩ | −1.6 | from RGB colour |
| ϵ | 0.31 | adopted ellipticityc |
| PA | 95° ± 15° | from R ≤ 150″ |
| μV(0) | 23.1 ± 0.1 mag/arcsec2 | central SBd |
| h | 2.0′ | Sérsic scale radiuse |
| r h | 1.9′ | Observedf |
| V tot | 11.7 ± 0.1 | Observedf |
| M V | −14.2 ± 0.2 | |
| L V |
|
total V luminosity |
| M HI | 4.1 × 107 M⊙ | gaseous massg |
| M dyn | ~ 1 × 109 M⊙ | total massh |
Notes.
From Cotton et al. (1999).
Averaged over the whole FoV from the reddening maps by Schlegel et al. (1998), as re-calibrated by Schlafly & Finkbeiner (2011).
From McConnachie (2012).
Average of μV for rϵ ≤ 0.5′. Not corrected for extinction. The μV(0) values extrapolated from fits with not fully adequate models (e.g. exponential models) can differ significantly from this observed value.
From the best-fit model for the entire profile (continuous line in Fig. 7).
From Ott et al. (2012).
See Sect. 5.
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