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- W3040153809 abstract "ABSTRACT We report the discovery of a bar, a pseudo-bulge, and unresolved point source in the archetype collisional ring galaxy Cartwheel using careful morphological analysis of a near-infrared (NIR) Ks-band image of excellent quality (seeing = 0.42″) at the ESO archive. The bar is oval-shaped with a semi-major axis length of 3.23″ (∼2.09 kpc), with almost a flat light distribution along it. The bulge is almost round (ellipticity = 0.21) with an effective radius of 1.62″ (∼1.05 kpc) and a Sersic index of 0.99, parameters typical of pseudo-bulges in late-type galaxies. The newly discovered bar is not recognizable as such in the optical images even with more than a factor of 2 higher spatial resolution of the Hubble Space Telescope, due to a combination of its red colour and the presence of dusty features. The observed bar and pseudo-bulge most likely belonged to the pre-collisional progenitor of the Cartwheel. The discovery of a bar in an archetype collisional ring galaxy Cartwheel is the first observational evidence to confirm the prediction that bars can survive a drop-through collision along with the morphological structures like a central bulge (pseudo)." @default.
- W3040153809 created "2020-07-10" @default.
- W3040153809 creator A5015087632 @default.
- W3040153809 creator A5018989573 @default.
- W3040153809 creator A5043778467 @default.
- W3040153809 date "2020-07-03" @default.
- W3040153809 modified "2023-09-27" @default.
- W3040153809 title "Discovery of a near-infrared bar and a pseudo-bulge in the collisional ring galaxy Cartwheel" @default.
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- W3040153809 doi "https://doi.org/10.1093/mnras/staa1887" @default.
- W3040153809 hasPublicationYear "2020" @default.
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