Results 21 to 30 of about 281 (182)
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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The Complex Structure of the Bulge of M31
The Astrophysical Journal Supplement Series, 2023 The bulge of M31 is of interest regarding the nature of galactic bulges and how their structure relates to bulge formation mechanisms and their subsequent evolution.
Denis Leahy +2 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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The Chemodynamics of the Stellar Populations in M31 from APOGEE Integrated-light Spectroscopy
The Astrophysical Journal, 2023 We present an analysis of nearly 1000 near-infrared, integrated-light spectra from APOGEE in the inner ∼7 kpc of M31. We utilize full-spectrum fitting with A-LIST simple stellar population spectral templates that represent a population of stars with the ...
Benjamin J. Gibson +10 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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Bulge Globular Clusters in Spiral Galaxies
The Astrophysical Journal, 2001 There is now strong evidence that the metal-rich globular clusters (GCs) near the center of our Galaxy are associated with the Galactic bulge rather than the disk as previously thought. Here we extend the concept of bulge GCs to the GC systems of nearby spiral galaxies.
Forbes, Duncan +2 more
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A connection between bulge properties and the bimodality of galaxies [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractThe global colors and structure of galaxies have recently been shown to follow bimodal distributions. Galaxies separate into a “red sequence”, populated prototypically by early-type galaxies, and a “blue cloud”, whose typical objects are late-type disk galaxies. Intermediate-type (Sa-Sbc) galaxies populate both regions.
Drory, N., Fisher, D.
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