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Table 1

Observed and derived parameters of Sextans A.

Parameter Value Notes

α 0 10:11:00.1 J2000a
δ 0 04:41:42.6 J2000a
l 0 246.15° Gal. long.
b 0 39.87° Gal. lat.
SGL 109.00° Supergal. long.
SGB −40.66° Supergal. lat.
E(BV) 0.035 ± 0.002 Average ± σb
(mM)0 25.77 ± 0.12
D 1.42 ± 0.08 Mpc
1 arcsec 6.9 pc conv. factor at D=1.42 Mpc
V h 324 ± 1 km s-2 heliocentric velocityc
V g 163 km s-1 galactocentric velocityc
⟨[Fe/H] ⟩ −1.45 from RGB colourd
ϵ 0.0 adopted
PA adopted
μV(0) 23.9 ± 0.1 mag/arcsec2 central SBe
h 2.5′ Sérsic scale radius
r h 1.8′ Observedf
V tot 11.7 ± 0.2 Observedf
M V −14.2 ± 0.3
L V total V luminosity
M HI 6.2 × 107 M gaseous massg
M dyn ~ 1 × 109 M total massh



Estimated by eye from our images.


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


From synthetic CMD fit on HST photometry by Dolphin et al. (2003).


Average of μV for Rϵ< 1.8′. 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 numerical integration of the SB profile in rϵ.


See Sect. 5.

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