Free Access

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(BV) 0.024 ± 0.003 Average ± σb
(mM)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.

(b)

Averaged over the whole FoV from the reddening maps by Schlegel et al. (1998), as re-calibrated by Schlafly & Finkbeiner (2011).

(d)

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.

(e)

From the best-fit model for the entire profile (continuous line in Fig. 7).

(f)

From the numerical integration of the SB profile in rϵ.

(h)

See Sect. 5.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.