Discovery of a galaxy associated with the HI cloud FAST J0139+4328

Open Access

Table 1.

Comparison of properties for FAST J0139+4328.

Parameter	Xu et al. (2023)	This Work
General Properties
RA (J2000)	$01^{h} 39^{m} 28 \overset{s}{.} 4$ $01^{\mathrm{h}}39^{\mathrm{m}}28{{\overset{\text{s}}{.}}}4$	$01^{h} 39^{m} 29 \overset{s}{.} 6$ $01^{\mathrm{h}}39^{\mathrm{m}}29{{\overset{\text{s}}{.}}}6$
Dec (J2000)	$+ 43 ° 28' 02 \overset{″}{.} 6$ $+43^{\circ}28^{\prime}02{{\overset{\prime\prime}{.}}}6$	$+ 43 ° 28' 29 \overset{″}{.} 8$ $+43^{\circ}28^{\prime}29{{\overset{\prime\prime}{.}}}8$
Distance D [Mpc]	28.8 ± 2.9	28.8 ± 2.9 (Adopted)
V_sys [km s⁻¹]	2464.4 ± 0.8 (HI)	2492 ± 25 (Hα)

Derived Properties
M_HI [M_⊙]	(8.3 ± 1.7)×10⁷	–
L_B [L_⊙]	< 1.4 × 10⁶	(1.11 ± 0.23)×10⁷
M_★ [M_⊙]	< 6.9 × 10⁵	(7.2 ± 3.7)×10⁶
M_HI/M_★	> 120	11.5 ± 6.4
Classification	Dark Galaxy Candidate	Gas-Rich LSB Dwarf

Notes. Values from Xu et al. (2023) represent the HI properties and optical upper limits from Pan-STARRS1. Our values represent the properties of the optical counterpart derived from deep LBVI imaging and Hα spectroscopy.

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