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Bayesian bulge–disc decomposition of galaxy images [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 We introduce PHI, a fully Bayesian Markov-chain Monte Carlo algorithm designed for the structural decomposition of galaxy images. PHI uses a triple layer approach to effectively and efficiently explore the complex parameter space. Combining this with the use of priors to prevent nonphysical models, PHI offers a number of significant advantages for ...
Argyle, JJ +3 more
core +7 more sources
A Counterrotating Bulge in the Sb Galaxy NGC 7331 [PDF]
The Astrophysical Journal, 1996 We have found that the bulge of the large, nearby Sb galaxy NGC 7331 rotates retrograde to its disk. Analysis of spectra in the region of the near-IR Ca II triplet along the major axis shows that, in the radial range between 5'' and ~20'', the line of sight velocity distribution of the absorption lines has two distinct peaks, and can be decomposed into
Prada, F +3 more
core +6 more sources
The Local Galaxy Density and the Bulge-to-Disk Ratio of Disk Galaxies [PDF]
The Astrophysical Journal, 1995 LATEX file, 19 pages, figures available on ...
GIURICIN G. +4 more
openaire +4 more sources
A Duality in the Origin of Bulges and Spheroidal Galaxies [PDF]
The Astrophysical Journal, 2021 Abstract Studying the resolved stellar populations of the different structural components that build massive galaxies directly unveils their assembly history. We aim at characterizing the stellar population properties of a representative sample of bulges and pure spheroids in massive galaxies (M ⋆ > 1010
Luca Costantin +13 more
openaire +8 more sources
Stellar Populations in Bulges of Spiral Galaxies [PDF]
Astrophysics and Space Science, 2002 To be published in "The Evolution of Galaxies. II. Basic Building Blocks", ed. M.
Jablonka, Pascale +2 more
openaire +6 more sources
Red galaxies with pseudo-bulges in the SDSS: closer to disc galaxies or to classical bulges? [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 Pseudo-bulges are expected to markedly differ from classical, quasi-monolithically forming bulges in their star formation history (SFH) and chemical abundance patterns. To test this simple expectation, we carry out a comparative structural and spectral synthesis analysis of 106 red, massive galaxies issued from the SDSS, subdivided into bulgeless ...
Ribeiro, B. +4 more
openaire +4 more sources
Colour Gradients in Galaxy Bulges [PDF]
Symposium - International Astronomical Union, 1993 Colour gradients, when due to stellar populations rather than dust, are potential diagnostics on the formation history of galaxy bulges. We have carried out measurements of colour gradients on a sample of 30 bulges, the first such study using CCD detectors.
BALCELLS, M, PELETIER, RF
openaire +2 more sources
The clustering of galaxies with pseudo-bulge and classical bulge in the local Universe [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 14 pages, 16 figures, accepted for publication in ...
Lan Wang +5 more
openaire +2 more sources
STELLAR POPULATIONS IN BULGES OF SPIRAL GALAXIES [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 We present line strengths in the bulges and inner discs of 38 galaxies in the local Universe, including several galaxies whose bulges were previously identified as being disc like in their colours or kinematics, to see if their spectral properties reveal evidence for secular evolution. We find that red bulges of all Hubble types are similar to luminous
B. K. Moorthy, J. A. Holtzman
openaire +2 more sources
On the origin of stars in bulges and elliptical galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 We investigate the stellar composition of bulges and elliptical galaxies as predicted by the CDM paradigm using semi-analytical modelling. We argue that spheroid stars are built up of two main components, {\it merger} and {\it quiescent}, according to the origin of the stars.
Khochfar, S., Silk, J.
openaire +2 more sources