Ionized and Cold Gas Components in Low Surface Brightness Galaxy AGC 102004

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dc.contributor.authorCao, Tian-Wen
dc.contributor.authorLi, Zi-Jian
dc.contributor.authorChen, Pei-Bin
dc.contributor.authorZhang, Chun-Yi
dc.contributor.authorGalaz, Gaspar
dc.contributor.authorCheng, Cheng
dc.contributor.authorYu, Qingzheng
dc.contributor.authorKalari, Venu M.
dc.contributor.authorWang, Junfeng
dc.contributor.authorWu, Hong
dc.date.accessioned2025-01-20T16:10:33Z
dc.date.available2025-01-20T16:10:33Z
dc.date.issued2024
dc.description.abstractWe present the integral field spectroscopic observations of ionized gas (H alpha and [N II]) using the PCWI, along with deep CO(2-1) observations by the '(U) over bar'(u) over bar receiver on JCMT for AGC 102004. The velocity field of H alpha shows an anomalous distribution in the northwestern (NW) disk. The H alpha spectrum is well-fitted by two Gaussian components, and the weak Gaussian component is dominated by the anomalous H alpha in the NW disk. The Gaussian fit center of H alpha emission is offset by +24.2 km s(-1) from the systemic velocity obtained from the H i emission. We derive the gas-phase metallicity, 12+log(O/H), using [N II]lambda 6583/H alpha 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 nondetection 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 x 107 M-circle dot with X-CO = 3.02 x 1020 cm(-2) (K km s(-1))(-1). The MH2 /M-HI(corr) of AGC 102004 is lower than 0.0037 and lower than that of normal galaxies.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad6848
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad6848
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90220
dc.identifier.wosidWOS:001294100500001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleIonized and Cold Gas Components in Low Surface Brightness Galaxy AGC 102004
dc.typeartículo
dc.volumen971
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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