Download or read book The Extent and Content of Low Ionization Gas in Galaxies written by Donna S. Womble and published by . This book was released on 1992 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Evolution of Galaxies and Their Environment written by David J. Hollenbach and published by . This book was released on 1993 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Low Ionization Gaseous Content in Intermediate Redshift Galaxies written by Christopher W. Churchill and published by . This book was released on 1997 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Accretion onto Galaxies written by Andrew Fox and published by Springer. This book was released on 2017-03-23 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume presents the current state of gas accretion studies from both observational and theoretical perspectives, and charts our progress towards answering the fundamental yet elusive question of how galaxies get their gas. Understanding how galaxies form and evolve has been a central focus in astronomy for over a century. These studies have accelerated in the new millennium, driven by two key advances: the establishment of a firm concordance cosmological model that provides the backbone on which galaxies form and grow, and the recognition that galaxies grow not in isolation but within a “cosmic ecosystem” that includes the vast reservoir of gas filling intergalactic space. This latter aspect in which galaxies continually exchange matter with the intergalactic medium via inflows and outflows has been dubbed the “baryon cycle”. The topic of this book is directly related to the baryon cycle, in particular its least well constrained aspect, namely gas accretion. Accretion is a rare area of astrophysics in which the basic theoretical predictions are established, but the observations have been as yet unable to verify the expectations. Accretion has long been seen around the Milky Way in so-called High Velocity Clouds, but detecting accretion even around nearby galaxies has proved challenging; its multi-phase nature requires sensitive observations across the electromagnetic spectrum for full characterization. A promising approach involves looking for kinematic signatures, but accretion signatures are often confused with internal motions within galaxies. Accretion studies therefore touch a wide range of astrophysical processes, and hence a wide cross-section of the astronomical community. As observational facilities are finally able to access the wavelength ranges and depths at which accretion processes may be manifest, the time is right to survey these multiple lines of investigation and determine the state of the field in accretion studies of the baryon cycle.
Download or read book Stellar Populations written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2010 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: IAU Symposium 262 presents reviews on the current understanding of the theories of stellar evolution, galaxy formation and galaxy evolution. It emphasises what we have learned in the past few years from massive surveys covering large portions of the sky (e.g. SDSS, HDF, UDF, GOODS, COSMOS). Several critical aspects of research on stellar populations deserve further effort in order to be brought in tune with other areas of astrophysical research. The next ten years will see the opening of major observatories that will increase the quality and quantity of astronomical data by orders of magnitude. The expected benefits from these instruments for the study of stellar populations are explored. This critical review of state of the art observational and theoretical work will appeal to all those working on stellar populations, from distant galaxies to local resolved galaxies and galactic star clusters.
Download or read book On the Baryonic Contents of Low Mass Galaxies written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The baryonic Tully-Fisher relation is an important observational constraint on cosmological and galactic models. However, it is critical to keep in mind that in observations only stars, molecular, and atomic gas are counted, while the contribution of the ionized gas is almost universally missed. The ionized gas is, however, expected to be present in the gaseous disks of dwarf galaxies simply because they are exposed to the cosmic ionizing background and to the stellar radiation that manages to escape from the central regions of the galactic disks into their outer layers. Such an expectation is, indeed, born out both by cosmological numerical simulations and by simple analytical models.
Download or read book Astrophysics Of Gas Nebulae and Active Galactic Nuclei written by Donald E. Osterbrock and published by University Science Books. This book was released on 2006 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly revised and expanded throughout, the new edition is a graduate-level text and reference book on gaseous nebulae, nova and supernova remnants. Much of the new data and new images are from the Hubble Space Telescope with two wholly new chapters being added along with other new features. The previous edition which was tried and tested for thirty years has now been succeeded by a revised, updated, larger edition, which will be valuable to anyone seriously interested in astrophysics.
Download or read book The Interplay Between Massive Star Formation the ISM and Galaxy Evolution written by D. Kunth and published by Atlantica Séguier Frontières. This book was released on 1996 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interstellar Medium in Galaxies written by Harley A. Thronson Jr. and published by Springer. This book was released on 2013-12-21 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the sixth Eurographics Workshop on Vir tual Environments. The event took place from June 1 to June 2, 2000, in Am sterdam. We hope that readers will find these proceedings to be valuable, not only for virtual environment researchers, but also for practitioners developing or using virtual environment applications. We are glad to report that visibility of the workshop continues to expand and that virtual environment researchers and practitioners from allover the world are submitting papers. This year, 40 papers and case studies were submitted of which 20 were accepted. In addition, we are glad to see that the focus of the workshop is also expanding. We accepted 6 research papers on evaluation of virtual environments and there was a broad sampling of other topics. We would like to thank all those involved in organizing the symposium. In particular, thanks go to Mieke Brune who was in charge of the local organization. In addition, we want to thank the international program committee for their excellent, yet laborious, job in reviewing all submitted papers. The quality of the workshop is a reflection of the quality of the submitted papers and the quality of the reviewing process.
Download or read book Cosmological Physics written by J. A. Peacock and published by Cambridge University Press. This book was released on 1999 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and authoritative introduction to contemporary cosmology for advanced undergraduate and graduate students.
Download or read book Encyclopedia of Optical Engineering Abe Las pages 1 1024 written by Ronald G. Driggers and published by CRC Press. This book was released on 2003 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt: PRINT/ONLINE PRICING OPTIONS AVAILABLE UPON REQUEST [email protected]
Download or read book Atlas of the Messier Objects written by Ronald Stoyan and published by Cambridge University Press. This book was released on 2024-03-28 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of this stunning reference atlas was hailed as the most comprehensive, detailed, and beautiful account of the Messier objects then available. The second edition of the Atlas continues this trend, with thoroughly updated astrophysical, historical, and observational information and new large-scale color photos for every object.
Download or read book The Kinematics of Ionized Gas in Nearby Edge on Galaxies from Multi long slit Spectroscopy written by Catharine Elizabeth Wu and published by . This book was released on 2014 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several galaxies show decreasing rotational velocities of hydrogen gas with increasing height above the disk. This is likely due to a combination of outflowing gas from galactic fountains and infalling gas with lower angular momentum from the CGM, IGM or satellite accretion. The degree to which each scenario contributes to a galaxy's extra-planar (EP) gas affects the velocity gradient and has implications for halo formation and evolution. Until recently, it was believed that most of this gas originates from fountain flows, but simulations have shown that as much as 15% of observed EP gas is infalling material. To study the behavior of ionized EP gas, we present optical observations of 13 edge-on galaxies from a multi-slit spectroscopic setup on the ARC 3.5m telescope at the Apache Point Observatory, NM. Our setup allows us to measure velocities of H-alpha-emitting gas as a function of height above the midplane in 11 radical distance bins in a single exposure. Our sample covers a range of star formation rates (L[subscript FIR]/D[2 over 25] of 0.03 - 8.9 X 1040) and includes active and passive galaxies. To aid in the analysis of our spectra, which suffer from projection effects due to our targets' edge-on nature, we developed modeling software for our multi-slit setup. We detect lagging EP gas in four galaxies. NGC 891, NGC 4517, and NGC 4565 have large lags that likely originate from galactic flows and accretion of lower angular momentum material. NGC 4631 has a small lag on its west side that is likely from fountain flows alone. We find evidence of a warped spiral arm on the east side of NGC 4631 and large outflows near the center of the galaxy. Three galaxies (NGC 3628, NGC 4013, NGC 5907) have non-lagging EP gas. Two galaxies (NGC 3044, NGC 3079) show EP gas with complicated kinematics, and we cannot determine if the gas is lagging. We detected no EP gas in three galaxies (UGC 4278, NGC 5229, UGC 7321), and we had one non-detection (NGC 4762). We see no trend between lagging gas and star formation, but the extent of EP gas does appear to be correlated with star formation.
Download or read book Concise Catalog of Deep Sky Objects written by Warren H. Finlay and published by Springer. This book was released on 2014-06-04 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is for the amateur astronomer who wants to know about the astrophysical nature of deep sky objects. The information is presented in a concise format and is equally valuable when used as background reading or, alternatively, at the telescope eyepiece. The past decades have seen an unprecedented increase in professional astronomers' understanding of astronomical objects. However, generally this information is contained in journal publications that most amateur astronomers either do not have access to or would find difficult to read. In this book, basic data on each object (e.g., magnitude, location, distance, age if known) is presented in a way that allows the reader to quickly access the information. This is followed by some remarks that capture the most fascinating astrophysical facts. Although there are thousands of deep sky objects observed by astronomers, only a small number of these are commonly observed by a wide audience. Thus, coverage here is limited to approximately 500 of the most commonly observed objects in the Northern Hemisphere and – an enhancement for the Second Edition – approximately 50 of those in the Southern Hemisphere. These are visible from the southern limits of the United States as well as from the southern continents. Another new feature of the Second Edition is the addition of amateur photographic images of all the Messier objects.
Download or read book QSO Absorption Lines written by J. Chris Blades and published by Cambridge University Press. This book was released on 1988-08-18 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second title in the series published for the Space Telescope Science Institute researches the current models of quasar absorption and the systems of absorption lines in the spectra of quasars. Experts in this field discuss the nature of the absorbing process in the vicinity of quasars, the "Lyman-alpha forest", metal-line systems, and quasars as probes of high redshift galaxies. The Hubble Space Telescope will be a valuable tool for learning more about the physics and astronomy of quasars.
Download or read book Literature 1987 Part 2 written by U. Esser and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astronomy and Astrophysics Abstracts aims to present a comprehensive documen tation of the literature concerning all aspects of astronomy, astrophysies, and their border fields. It is devoted to the recording, summarizing, and indexing of the relevant publications throughout the world. Astronomy and Astrophysics Abstracts is prepared by a special department of the Astronomisches Rechen-Institut under the auspices of the International Astronomical Union. Volume 44 records literature published in 1987 and received before February 15, 1988. Some older documents which we received late and which are not surveyed in earlier volumes are inc1uded too. We acknowledge with thanks contributions of our colleagues all over the world. We also express our gratitude to all organiza tions, observatories, and publishers which provide us with complimentary copies of their publications. Dr. Siegfried Böhme retired from his duties as co-editor of Astronomy and Astro physics Abstracts on December 31, 1987. Since 1950 he partieipated in the biblio graphie work of the institute. He served as a reviewer for the Astronomischer Jahresbericht and became one of the editors of Astronomy and Astrophysics Ab stracts in 1969. After his retirement in 1975 he took care of, particularly, the Russian literature on a voluntary basis for 12 years. It is a pleasure to thank Siegfried Böhme for his valuable contributions. Starting with Volume 33, all the recording, correction, and data processing work was done by means of computers. The recording was done by our technical staff members Ms. Helga Ballmann, Ms. Christiane Jehn, Ms. Monika Kohl, Ms.
