Results 11 to 20 of about 345 (137)
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
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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
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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
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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
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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
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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.
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Intrinsic Shape of Bulges in Disk Galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractWe analyzed the 2MASS images of a sample of 148 bright, nearby and unbarred galaxies to derive the photometric parameters of their bulge and disk by applying an accurate 2D decomposition algorithm. As a model for the bulge we have considered a system where the surfaces of equal density of light are coaxial and concentric ellipsoids with ...
MÉNDEZ ABREU J. +3 more
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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
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IR Imaging of Spiral Galaxy Bulges [PDF]
Symposium - International Astronomical Union, 1993 Imaging in the infrared (2.2μ) minimizes the impact of dust obscuration and allows reliable mapping of the mass-tracing stellar population in spiral galaxies. We find dramatic differences compared to photometry at shorter wavelengths (e.g. 0.8μ). As an example, the observations of the mini-bar and inner spiral arms of M 51 are discussed.
Dennis Zaritsky +2 more
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Photometric scaling relations for bulges of galaxies [PDF]
Astronomy & Astrophysics, 2006 27 pages, 16 figures, accepted in A& ...
Ravikumar, C. D. +4 more
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