Ionized and cold gas components in low surface brightness galaxy AGC 102004

We present the integral field spectroscopic observations of ionized gas (H and N{II}) using the PCWI, along with deep CO (2-1) observations by the ^ U^ u receiver on JCMT for AGC 102004. The velocity field of H shows an anomalous distribution in the North-Western (NW) disk. The H spectrum is well-fitted by two Gaussian components, and the weak Gaussian component is dominated by the anomalous H in the NW disk. The Gaussian fit center of H emission is offset by +24. 2 km s^-1 from the systemic velocity obtained from the HI emission. We derive the gas-phase metallicity, 12+log (O/H), using N{II}6583/H ratio as a proxy. The mean value of 12+log (O/H) is 8. 30 0. 19 over the whole galaxy. The metallicity in the outer disk is lower than the detection limit of 7. 72, indicating the metallicity gradient exists in AGC 102004. We speculate a minor/mini-merger event could have happened to the NW disk. CO (2-1) emission has non-detection in AGC 102004, reaching a noise level of 0. 33 mK smoothed to 30 km s^-1. The upper limit of molecular gas mass in AGC 102004 is 2. 1 10⁷ M with X ₂₎ = 3. 0210^20 cm^-2 (K km s^-1) ^-1. The M ₇䃒/M^ corr ₇₈ of AGC 102004 is lower than 0. 0037 and lower than that of normal galaxies.