Published December 31, 1899
by Springer .
Written in English
|Contributions||B. Barbuy (Editor), A. Renzini (Editor)|
|The Physical Object|
|Number of Pages||540|
Astronomy Stellar Populations in the Galaxy. Table of contents. My highlights Print Buy book. Table of contents Among the things a large telescope and dark skies enabled Baade to examine carefully were other galaxies—neighbors of our Milky Way Galaxy. We will discuss other galaxies in the The OpenStax name, OpenStax logo. The Stellar Populations of Galaxies H.‐W. Rix IMPRS Galaxies Course Ma Goal: Determine n (M *,t age,[Fe/H],R) for a population of galaxies How many stars of . • Historically specific stellar absorption features over narrow wavelength intervals were used when analyzing galaxy spectra to obtain the ages and metallicities of the stellar populations • For galaxies with old stellar populations, the Lick/IDS system of ~25 narrow-band indices was often used (Worthey Evolution of Stars and Stellar Populations is a comprehensive presentation of the theory of stellar evolution and its application to the study of stellar populations in galaxies. Taking a unique approach to the subject, this self-contained text introduces first the theory of stellar evolution in a clear and accessible manner, with particular emphasis placed on explaining the evolution with Cited by:
Evolution of Stars and Stellar Populations is a comprehensive presentation of the theory of stellar evolution and its application to the study of stellar populations in galaxies. Taking a unique approach to the subject, this self-contained text introduces first the theory of stellar evolution in a clear and accessible manner, with particular emphasis placed on explaining the evolution with /5(3). Stellar development. Observation of stellar spectra has revealed that stars older than the Sun have fewer heavy elements compared to the Sun. This immediately suggests that metallicity has evolved through the generations of stars by the process of stellar evolution.. Formation of the first stars. Under current cosmological models, all matter created in the Big Bang was mostly . One approach to learning about stellar populations is to study them at three different levels of resolution. First in our own Galaxy; secondly from nearby galaxies where stars can still be resolved; and thirdly in remote galaxies in which the stellar population can only be studied in integrated light. Figure 2. Andromeda Galaxy (M31): This neighboring spiral looks similar to our own Galaxy in that it is a disk galaxy with a central bulge. Note the bulge of older, yellowish stars in the center, the bluer and younger stars in the outer regions, and the .
So brighter galaxies are more metal-rich. The differences between elliptical galaxies and star forming spirals can be seen in plots of color versus luminosity or stellar mass: they form a distinct "red sequence" which is offset from the "blue cloud" of star forming galaxies: Remember terminology: "early-type" means E/S0, "late-type" means Sb/Sc. Stellar Populations One of the most interesting discoveries about our galaxy is that it contains a range of star types of different composition, age, distribution, and orbital geometry. Smaller collections of stars that have formed together and are held together by gravity — stellar groups and associations, and globular clusters. The authors are leading theoretical astrophysicists who have made major contributions to galaxy formation theory. Their text provides a comprehensive review of relevant topics, ranging from the growth of the first density fluctuations to the evolution of the stellar populations in galaxies.'' Joseph Silk, in Physics Today, July The concept of Stellar Populations has played a fundamental role in astronomy in the last few decades. It was introduced by Walter Baade after he was able to resolve the Andromeda Nebula and its companions into stars when he used red-sensitive plates and realised that there were two fundamentally different Herzsprung-Russell diagrams in our and these nearby galaxies .