Luminous Stars In Nearby Galaxies
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Luminous Stars In Nearby Galaxies
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Author : Roberta M. Humphreys
language : en
Publisher: MDPI
Release Date : 2020-12-10
Luminous Stars In Nearby Galaxies written by Roberta M. Humphreys and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-10 with Computers categories.
Studies on the populations of luminous stars in nearby resolved galaxies have revealed a complex distribution in the luminosity–temperature plane (the HR diagram). The fundamentals of massive star evolution are mostly understood, but the roles of mass loss, episodic mass loss, rotation, and binarity are still in question. Moreover, the final stages of these stars of different masses and their possible relation to each other are not understood. The purpose of this volume is to provide a current review of the different populations of evolved massive stars. The emphasis is on massive stars in the Local Group, the Magellanic Clouds, and the nearby spirals M31 and M33.
Luminous Stars In Nearby Galaxies
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Author : Roberta M. Humphreys
language : en
Publisher:
Release Date : 2020
Luminous Stars In Nearby Galaxies written by Roberta M. Humphreys and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Studies on the populations of luminous stars in nearby resolved galaxies have revealed a complex distribution in the luminosity-temperature plane (the HR diagram). The fundamentals of massive star evolution are mostly understood, but the roles of mass loss, episodic mass loss, rotation, and binarity are still in question. Moreover, the final stages of these stars of different masses and their possible relation to each other are not understood. The purpose of this volume is to provide a current review of the different populations of evolved massive stars. The emphasis is on massive stars in the Local Group, the Magellanic Clouds, and the nearby spirals M31 and M33.
Hot Luminous Stars In Nearby Galaxies
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Author :
language : de
Publisher:
Release Date : 1996
Hot Luminous Stars In Nearby Galaxies written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Luminous Stars And Associations In Galaxies
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Author : International Astronomical Union. Symposium
language : en
Publisher: Springer Science & Business Media
Release Date : 1986-06-30
Luminous Stars And Associations In Galaxies written by International Astronomical Union. Symposium and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986-06-30 with Science categories.
Proceedings of the 116th Symposium of the International Astronomical Union, held at Porto Heli, Greece, May 26-31, 1985
Observational Constraints On Models Of Rapidly Evolving Luminous Stars
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Author : Philip A. Rosenfield
language : en
Publisher:
Release Date : 2013
Observational Constraints On Models Of Rapidly Evolving Luminous Stars written by Philip A. Rosenfield and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Andromeda Galaxy categories.
Resolved stellar populations in galaxies are excellent laboratories for testing our understanding of galaxy formation, integrated colors and luminosities, supernova progenitor masses, and energy input from stellar feedback. However, the usefulness of resolved stellar populations rests on the ability to accurately model the evolution of the underlying stars. In this dissertation, I present three projects, the first uses stellar evolution models of hot post-horizontal branch stars to explain the some of the of excess ultra-violet (UV) flux emitted from the center of the Andromeda galaxy. This flux was imaged as part of the Panchromatic Hubble Andromeda Treasury HST multi-cycle program, and excess of UV light from the centers of large elliptical galaxies has been well documented. Therefore, the results of this project go beyond stellar evolution and understanding M31. I find that this population of stars are indeed failed AGB stars or left the AGB early. I also find the stars producing the excess UV light are strongly concentrated in the central regions of the M31 bulge, which must shed light on the progenitor stars. The subsequent two projects each constrain uncertain aspects of uncertain phases of stellar evolution using nearby dwarf galaxies from the HST ACS Nearby galaxy Survey Treasury and a follow-up HST/SNAP campaign which imaged a subset of ANGST galaxies in the near infrared. The two uncertain phases of stellar evolution studied are the luminous core Helium burning (HeB) phase and the thermally pulsating AGB phase. Dwarf galaxies from the ANGST are an ideal environment to test new models because they span ~2 dex in metallicity, more than 30 galaxies have significant HeB populations, and we have HST/NIR follow up data for 26 galaxies with a large AGB population. I find that the convection occurring the HeB stars must increase in strength with increasing mass, and I find constrains on the mass loss prescriptions for low metallicity TP-AGB stars from 0.8- ~4 M.
Luminous Stars And Associations In Galaxies
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Author : C. de Loore
language : en
Publisher: Springer
Release Date : 1986-06-30
Luminous Stars And Associations In Galaxies written by C. de Loore and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986-06-30 with Science categories.
Proceedings of the 116th Symposium of the International Astronomical Union, held at Porto Heli, Greece, May 26-31, 1985
The Milky Way And Beyond Stars Nebulae And Other Galaxies
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Author : Britannica Educational Publishing
language : en
Publisher: Britannica Educational Publishing
Release Date : 2009-10-01
The Milky Way And Beyond Stars Nebulae And Other Galaxies written by Britannica Educational Publishing and has been published by Britannica Educational Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-10-01 with Juvenile Nonfiction categories.
The Sun is merely one of some 200 billion stars that make up the Milky Way--and the Milky Way is only one of a billion galaxies in the known universe. Packed with fascinating facts and stunning photography, this book examines the Galaxy humans call home and travels light years away, to the domain of phenomena such as the Oort cloud.
Stellar Astrophysics For The Local Group
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Author : A. Aparicio
language : en
Publisher: Cambridge University Press
Release Date : 1998-06-13
Stellar Astrophysics For The Local Group written by A. Aparicio and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-06-13 with Science categories.
A review of the new subject of extragalactic stellar astrophysics - for both graduate students and researchers working in astrophysics.
Galaxies In The Universe
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Author : Linda S. Sparke
language : en
Publisher: Cambridge University Press
Release Date : 2000-08-21
Galaxies In The Universe written by Linda S. Sparke and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-08-21 with Science categories.
This textbook provides a comprehensive and lucid modern introduction to galaxies for advanced undergraduate students in astronomy and physics. Basic astrophysics, multiwavelength observations and theoretical concepts are carefully combined to develop an integrated understanding. All the necessary background astronomy is included and mathematics has been kept to the minimum required to enable the student to quickly grasp the essence of a calculation, or the basis for a method. The clear and friendly style of the text, thorough coverage of fundamentals, extensive use of up-to-date observations, and helpful problems make this an ideal introduction to galaxies and thorough preparation for more advanced texts and the research literature.
Reviews In Modern Astronomy
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Author : Gerhard Klare
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Reviews In Modern Astronomy written by Gerhard Klare and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The International Scientific Spring Meeting of the Astronomische Ge sellschaft (AG) held at Bamberg in April 1991 was devoted to "Vari abilities in Stars and Galaxies". Time-dependent phenomena are observed in a wide range of as tronomical objects. They are caused by different physical mechanisms (for example by pulsation, by accretion, or by dramatic eruptive events in connection with mass outflow) producing observable intensity vari ations through all wavelengths. Many of the papers in this volume are concerned with galactic stars showing such behaviour (for ex ample cataclysmic variables, symbiotic stars, luminous blue variables (LBVs) and novae). Intrinsic variations of the, magnetic field struc ture on observable time scales are, for instance, a peculiarity of cool, solar-like stars and represent a useful tool to study differential rotation and cycles of activity. Recent results on the investigation of gas motions in the inner regions of the Milky Way system, a study of the bipolar galaxy M 82, observations of variable extragalactic radio sources, the variability of emission lines in active galactic nuclei (AGN) as well as continuum variations of quasars and AGN are discussed by several authors. The yearbook series Reviews in Modern Astronomy of the AG to bring the scientific events of the was established in 1988 in order meetings of the society to the attention of the worldwide astronomical community.