Results 41 to 50 of about 172,368 (310)
Ages and metallicities of central and satellite galaxies: implications for galaxy formation and evolution [PDF]
, 2009 Using the stellar ages and metallicities of galaxies in the Sloan Digital Sky Survey (SDSS) obtained by Gallazzi et al. and the SDSS galaxy group catalogue of Yang et al., we study how the stellar ages and metallicities of central and satellite galaxies ...
A. Pasquali +7 more
semanticscholar +1 more source
Stellar populations in gas-rich galaxy mergers I. Dependence on star formation history
, 1998 We investigate the nature of stellar populations of major galaxy mergers between late-type spirals considerably abundant in interstellar medium by performing numerical simulations designed to solve both the dynamical and chemical evolution in a self ...
Bekki, Kenji, Shioya, Yasuhiro
core +1 more source
Galaxy peculiar velocities and evolution-bias [PDF]
, 2007 Galaxy bias can be split into two components: a formation-bias based on the locations of galaxy creation, and an evolution-bias that details their subsequent evolution. In this letter we consider evolution-bias in the peaks model.
Percival, Will J., Schaefer, Bjoern M.
core +2 more sources
Internal Secular Evolution in Disk Galaxies: The Growth of Pseudobulges
, 2007 Observational and theoretical evidence that internal, slow ("secular") evolution reshapes galaxy disks is reviewed in Kormendy & Kennicutt (2004, ARAA, 42, 603). This update has three aims.
Athanassoula +14 more
core +1 more source
Physical Sciences Forum, 2023 The G2 gas cloud motion data and the scarcity of observations on the event horizon-scale distances have challenged the comprehensiveness of the central supermassive black hole model.
Mohammed B. Al-Fadhli
doaj +1 more source
Galaxy Formation and Evolution since z = 1 [PDF]
, 2006 Determination of the star formation rate can be done using mid-IR photometry or Balmer line luminosity after a proper correction for extinction effects. Both methods show convergent results while those based on UV or on [OII]3727 luminosities underestimate the SFR by factors ranging from 5 to 40 for starbursts and for luminous IR galaxies, respectively.
Hammer, François +5 more
openaire +3 more sources
Formation and Evolution of Disk Galaxies [PDF]
Symposium - International Astronomical Union, 1999 We have developed a semianalitical approach to study galaxy formation and evolution in the cosmological context. Disk galaxies (dark matter halo+luminous disk) are considered to be formed through an extended process of gravitational collapse, whose character is determined by the statistical properties of the density fluctuation field assumed here to be
C. Firmani, V. Avila-Reese
openaire +1 more source
Life in the fast lane: a direct view of the dynamics, formation, and evolution of the Milky Way’s bar [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Studies of the ages, abundances, and motions of individual stars in the Milky Way provide one of the best ways to study the evolution of disc galaxies over cosmic time.
J. Bovy +5 more
semanticscholar +1 more source
A Study of Three Galaxy Types, Galaxy Formation, and Warm Dark Matter
International Journal of Astronomy and Astrophysics International Journal of Astronomy and Astrophysics, 2021 We try to bridge the gap between the theory of linear density-velocity-gravi-tational perturbations in the early universe, and the relaxed galaxies we observe today. We succeed quantitatively for dark matter if dark matter is warm.
B. Hoeneisen
semanticscholar +1 more source
New chemical evolution analytical solutions including environment effects
, 2015 In the last years, more and more interest has been devoted to analytical solutions, including inflow and outflow, to study the metallicity enrichment in galaxies.
Spitoni, E.
core +1 more source