Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-11-25
Astronomy and Astrophysics
Astrophysics
(1) GEPI, Obs. Meudon, France ;(2)Max-Planck Institut fuer Astronomie, Germany (3) National Astronomical Observatories, CAS, C
Scientific paper
Re-examination of the properties of distant galaxies leads to the evidence that most present-day spirals have built up half of their stellar masses during the last 8 Gyr, mostly during several intense phases of star formation during which they took the appearance of luminous infrared galaxies (LIRGs). Distant galaxy morphologies encompass all of the expected stages of galaxy merging, central core formation and disk growth, while their cores are much bluer than those of present-day bulges. We have tested a spiral rebuilding scenario, for which 75+/-25% of spirals have experienced their last major merger event less than 8 Gyr ago. It accounts for the simultaneous decreases, during that period, of the cosmic star formation density, of the merger rate, of the number densities of LIRGs and of compact galaxies, while the densities of ellipticals and large spirals are essentially unaffected.
Flores Hector
Hammer Francçois
Liang Yanbin
Zheng Xian Zhong
No associations
LandOfFree
A recent rebuilding of most spirals ? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A recent rebuilding of most spirals ?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A recent rebuilding of most spirals ? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-414554