半圆凿
发表于 2025-3-28 17:31:07
Chemo-Dynamical Models and the Star Formation History of Galaxiesllagher et al. (1984), who determined the SFR at three different epochs of galactic evolution. Sandage’s figure establishes a connection of SFR and Hubble type but, as was already mentioned by Sandage, it “contains no physics” In order to explore the background of this connection, however, it is nec
擦掉
发表于 2025-3-28 18:46:40
Ages of Galaxy Bulges and Disks from Optical and Near-Infrared Coloursns larger than 50° it is easy to separate bulges and disks. By measuring the colours in special regions, we minimize the effects of extinction, and by looking at . colour gradients we can show that for these type of spirals the colours mainly give information about stellar populations, and not extin
尾随
发表于 2025-3-28 23:00:23
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Emg827
发表于 2025-3-29 04:40:57
Dynamical Constraints on the Formation of Elliptical Galaxiesrole in providing evidence for dark halos and central black holes. The different orbital structures and shapes of low-mass and giant elliptical galaxies provide essential constraints on scenarios of galaxy formation.
加入
发表于 2025-3-29 09:59:12
Disky Ellipticals in the Hubble Sequencerter 1987, Bender 1988b, Nieto 1988), are much weaker radio emitters than ellipticals in average and show no strong X-ray emission in excess of their discrete sources contribution. They have pointed isophotes which are thought to reflect the presence of embedded stellar disks. A large number of thes
employor
发表于 2025-3-29 15:22:29
Population Synthesis Modelse groups have been particularly active: Arimoto & Yoshii (1987), Guiderdoni & Rocca-Volmerange (1987), Buzzoni (1989), Fritze-v. Alvensleben & Gerhard (1994), Bressan, Chiosi, & Fagotto (1994), Bruzual & Charlot (1993, 1995). The basic astrophysical ingredients used in these models are the stellar e
泄露
发表于 2025-3-29 19:31:36
Finding Ages for Old Stellar Populations, but the path toward such a dream is becoming more clear. Still, we are denied the easiest paths, and most of what I have been thinking about in the last six months are the . rather than the . in age determinations for old stellar populations, and Es in particular. The following list should illustr
含糊
发表于 2025-3-29 20:27:37
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Nucleate
发表于 2025-3-30 02:53:42
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类人猿
发表于 2025-3-30 07:04:02
Dwarf and Low Surface Brightness Galaxiesthus necessary to explicitly quantify the definitions which are adopted. Here I shall limit the discussion to field galaxies which are disks characterized by a scale size . and central surface brightness μ..