The Role of Massive Stars in Young Starburst Galaxies - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Role of Massive Stars in Young Starburst Galaxies write by Richard Paul Furber Norris. This book was released on 2003. The Role of Massive Stars in Young Starburst Galaxies available in PDF, EPUB and Kindle.
Star Formation in Galaxies
Star Formation in Galaxies - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Star Formation in Galaxies write by . This book was released on 1987. Star Formation in Galaxies available in PDF, EPUB and Kindle.
Extragalactic Astronomy and Cosmology
Extragalactic Astronomy and Cosmology - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Extragalactic Astronomy and Cosmology write by Peter Schneider. This book was released on 2014-10-08. Extragalactic Astronomy and Cosmology available in PDF, EPUB and Kindle. This second edition has been updated and substantially expanded. Starting with the description of our home galaxy, the Milky Way, this cogently written textbook introduces the reader to the astronomy of galaxies, their structure, active galactic nuclei, evolution and large scale distribution in the Universe. After an extensive and thorough introduction to modern observational and theoretical cosmology, the focus turns to the formation of structures and astronomical objects in the early Universe. The basics of classical astronomy and stellar astrophysics needed for extragalactic astronomy are provided in the appendix. While this book has grown out of introductory university courses on astronomy and astrophysics and includes a set of problems and solutions, it will not only benefit undergraduate students and lecturers; thanks to the comprehensive coverage of the field, even graduate students and researchers specializing in related fields will appreciate it as a valuable reference work.
The Formation and Early Evolution of Stars
The Formation and Early Evolution of Stars - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Formation and Early Evolution of Stars write by Norbert S. Schulz. This book was released on 2012-05-24. The Formation and Early Evolution of Stars available in PDF, EPUB and Kindle. Starburst regions in nearby and distant galaxies have a profound impact on our understanding of the early universe. This new, substantially updated and extended edition of Norbert Schulz’s unique book "From Dust to Stars" describes complex physical processes involved in the creation and early evolution of stars. It illustrates how these processes reveal themselves from radio wavelengths to high energy X-rays and gamma–rays, with special reference towards high energy signatures. Several sections devoted to key analysis techniques demonstrate how modern research in this field is pursued and new chapters are introduced on massive star formation, proto-planetary disks and observations of young exoplanets. Recent advances and contemporary research on the theory of star formation are explained, as are new observations, specifically from the three great observatories of the Spitzer Space Telescope, the Hubble Space Telescope and the Chandra X-Ray Observatory which all now operate at the same time and make high resolution space based observing in its prime. As indicated by the new title two new chapters have been included on proto-planetary disks and young exoplanets. Many more colour images illustrate attractive old and new topics that have evolved in recent years. The author gives updates in theory, fragmentation, dust, and circumstellar disks and emphasizes and strengthens the targeting of graduate students and young researchers, focusing more on computational approaches in this edition.
The Properties of Star-Forming Galaxies at Z~2
The Properties of Star-Forming Galaxies at Z~2 - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Properties of Star-Forming Galaxies at Z~2 write by Dawn Erb. This book was released on 2005. The Properties of Star-Forming Galaxies at Z~2 available in PDF, EPUB and Kindle. We study the properties of star-forming galaxies at redshift z 2, an era in which a substantial fraction of the stellar mass in the universe formed. Using 114 near-IR spectra of the H-alpha and [N II] emission lines and model spectral energy distributions fit to rest-frame UV through IR photometry, we examine the galaxies' star formation properties, dynamical masses and velocity dispersions, spatially resolved kinematics, outflow properties, and metallicities as a function of stellar mass and age. While the stellar masses of the galaxies in our sample vary by a factor of 500, dynamical masses from H-alpha velocity dispersions and indirect estimates of gas masses imply that the variation of stellar mass is due as much to the evolution of the stellar population and the conversion of gas into stars as to intrinsic differences in the total masses of the galaxies. About 10% of the galaxies are apparently young starbursts with high gas fractions, caught just as they have begun to convert large amounts of gas into stars. Using the [N II]/H-alpha ratio of composite spectra to estimate the average oxygen abundance, we find a monotonic increase in metallicity with stellar mass. From the estimated gas fractions, we conclude that the observed mass-metallicity relation is primarily driven by the increase in metallicity as gas is converted to stars. The picture that emerges is of galaxies with a broad range in stellar population properties, from young galaxies with ages of a few tens of Myr, stellar masses M 10 DEGREES9 Msun, and metallicities Z 1/3 Zsun, to massive objects with M* 10 DEGREES11 Msun, Z Zsun, and ages as old as the universe allows. All, however, are rapidly star-forming, power galactic-scale outflows, and have masses in gas and stars of at least 10 DEGREES10 Msun, in keeping with their likely role as the progenitors of elliptical galaxies
