Deep Photometry of Galaxies in the VEGAS Survey: The Case of NGC 4472

Spavone, M.

doi:10.1007/978-3-319-19330-4_26

Astrophysics and Space Science Proceedings

2016

DOI: 10.1007/978-3-319-19330-4_26

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Deep Photometry of Galaxies in the VEGAS Survey: The Case of NGC 4472

M. Spavone

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2024

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Repainting the colour–mass diagrams by unearthing the green mountain: dust-rich S0 galaxies in the colour–(galaxy stellar mass) diagram, and the colour–(black hole mass) relations for dust-poor versus dust-rich galaxies

Graham

2024

Monthly Notices of the Royal Astronomical Society

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Lenticular galaxies are notoriously misclassified as elliptical galaxies and, as such, a (disc inclination)-dependent correction for dust is often not applied to the magnitudes of dusty lenticular galaxies. This results in overly red galaxy colours, impacting their distribution in the colour-magnitude diagram. It is revealed how this has led to an underpopulation of the ‘green valley’ by hiding a ‘green mountain’ of massive dust-rich lenticular galaxies—known to be built from gas-rich major mergers—within the ‘red sequence’ of colour-(stellar mass) diagrams. Correcting for dust, a ‘green mountain’ appears at M*, gal ∼ 1011 M⊙, along with signs of an extension to lower masses producing a ‘green range’ or ‘green ridge’ on the green side of the ‘red sequence’ and ‘blue cloud.’ The ‘red sequence’ is shown to be comprised of two components: a red plateau defined by elliptical galaxies with a near-constant colour and by lower-mass dust-poor lenticular galaxies, which are mostly a primordial population but may include faded/transformed spiral galaxies. The presence of the quasi-triangular-shaped galaxy evolution sequence, previously called the ‘Triangal’, is revealed in the galaxy colour-(stellar mass) diagram. It tracks the speciation of galaxies and their associated migration through the diagram. The connection of the ‘Triangal’ to previous galaxy morphology sequences (Fork, Trident, Comb) is also shown herein. Finally, the colour-(black hole mass) diagram is revisited, revealing how the dust correction generates a blue-green sequence for the spiral and dust-rich lenticular galaxies that is offset from a green-red sequence defined by the dust-poor lenticular and elliptical galaxies.

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Repainting the colour–mass diagrams by unearthing the green mountain: dust-rich S0 galaxies in the colour–(galaxy stellar mass) diagram, and the colour–(black hole mass) relations for dust-poor versus dust-rich galaxies

Graham

2024

Monthly Notices of the Royal Astronomical Society

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show abstract

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Deep Photometry of Galaxies in the VEGAS Survey: The Case of NGC 4472

Cited by 1 publication

References 10 publications

Repainting the colour–mass diagrams by unearthing the green mountain: dust-rich S0 galaxies in the colour–(galaxy stellar mass) diagram, and the colour–(black hole mass) relations for dust-poor versus dust-rich galaxies

Repainting the colour–mass diagrams by unearthing the green mountain: dust-rich S0 galaxies in the colour–(galaxy stellar mass) diagram, and the colour–(black hole mass) relations for dust-poor versus dust-rich galaxies

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