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Distance and reddening of the Local Group dwarf irregular galaxy NGC 6822
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abstract
On the basis of a new photometric analysis of the Local Group dwarf irregular galaxy NCG 6822 based on observations obtained with the Advanced Camera for Surveys onboard the Hubble Space Telescope, we have obtained a new estimate of the extinction of two fields located in the southeast region of the galaxy. Because of significant differences in the distance estimates to NGC 6822 available in literature, we decided to provide an independent determination of the distance to this galaxy based on an updated and self-consistent theoretical calibration of the tip of the red giant branch brightness. As a result we newly determined the distance to NGC 6822 to be equal to ${\rm(m-M)}_0=23.54\pm 0.05$, and compared our measurement with the most recent determinations of this distance.
Forward citations
Cited by 2 Pith papers
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Radial Stellar Age Gradients in 42 Local Volume Dwarf Galaxies
In 42 dwarf galaxies, radial age gradients correlate strongly with global formation history in a way that favors simulations without radially breathing gas flows.
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JWST NIRCam and MIRI Reveal the Dust-Producing AGB Population of NGC 6822
JWST photometry of NGC 6822 yields 1226 evolved stars returning 5.6e-7 Msun/yr of dust (60% oxygen-rich AGB, 35% carbon-rich) despite low metallicity, plus colour-based DPR estimators.
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