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Mass Outflows from Stars and Galactic Nuclei

Author: Luciana Bianchi

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 427

ISBN-13: 9400929412

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The objective of this workshop was to put together observational and theoretical works on outflows from different kinds of astrophysical objects, occurring on different scales and at various evolutionary phases, and to discuss the impact of observations from future space missions. For the stars, we thought to follow throughout the evolution the relevance (rates and dynamical rrodes) of the mass loss phenomenon, e. g. to explain how and when massive stars loose most of their ini tial mass to end up with typical WD masses. The observations of the solar wind were included for being a unique case where the origin and propagation of the outflow can be resolved. We thought that the comparison with similar phenomena occurring in galactic outflows would be fruitful, as demonstrated by recent works on galactic winds and jets. The interest of having this workshop in Torino came because there are groups in this area, at the Astronomical Observatory and at the Institute of Physics of the University, involved in the theoretical and observational studies of outflows from astrophysical objects. The members of the Scientific Organizing Conmi ttee were: V. Castellani, C. Cesarski, P. Conti, A. Ferrari, A. Gabriel, M. Grewing, Y. Kondo, H. Lamers, V. Manno, M. Rees and R. Schilizzi. The Local Organizing Conmi ttee was: L. Bianchi, G. Massone and E. Antonucci. During the workshop the following topics were treated: the solar wind, the mass loss from cool stars and from hot stars (m. s.

Book Synopsis Mass Outflows from Stars and Galactic Nuclei by : Luciana Bianchi

Download or read book Mass Outflows from Stars and Galactic Nuclei written by Luciana Bianchi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this workshop was to put together observational and theoretical works on outflows from different kinds of astrophysical objects, occurring on different scales and at various evolutionary phases, and to discuss the impact of observations from future space missions. For the stars, we thought to follow throughout the evolution the relevance (rates and dynamical rrodes) of the mass loss phenomenon, e. g. to explain how and when massive stars loose most of their ini tial mass to end up with typical WD masses. The observations of the solar wind were included for being a unique case where the origin and propagation of the outflow can be resolved. We thought that the comparison with similar phenomena occurring in galactic outflows would be fruitful, as demonstrated by recent works on galactic winds and jets. The interest of having this workshop in Torino came because there are groups in this area, at the Astronomical Observatory and at the Institute of Physics of the University, involved in the theoretical and observational studies of outflows from astrophysical objects. The members of the Scientific Organizing Conmi ttee were: V. Castellani, C. Cesarski, P. Conti, A. Ferrari, A. Gabriel, M. Grewing, Y. Kondo, H. Lamers, V. Manno, M. Rees and R. Schilizzi. The Local Organizing Conmi ttee was: L. Bianchi, G. Massone and E. Antonucci. During the workshop the following topics were treated: the solar wind, the mass loss from cool stars and from hot stars (m. s.

Mass Outflows from Stars and Galactic Nuclei

Author: Luciana Bianchi

Publisher:

Published: 1988

Total Pages: 440

ISBN-13:

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Book Synopsis Mass Outflows from Stars and Galactic Nuclei by : Luciana Bianchi

Download or read book Mass Outflows from Stars and Galactic Nuclei written by Luciana Bianchi and published by . This book was released on 1988 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mass Outflow in Active Galactic Nuclei

Author: D. Michael Crenshaw

Publisher:

Published: 2002

Total Pages: 562

ISBN-13:

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Annotation Proceedings of a March 2001 workshop held in Washington, D.C., bringing together an international group of researchers to share new developments in the field during the last four years. Fifty-seven contributions are arranged in sections on X-ray absorption and emission; intrinsic UV absorption; broad absorption-line QSOs; narrow- line region, broad-line region and jets; and kinematics and dynamical models. A sampling of topics: high-resolution X-ray spectroscopy of the warm gas in Seyfert 1 galaxies, observations of warm absorbers in AGN, radio-selected broad absorption line quasars, the importance of shocks in the ionization of the narrow line region of Seyferts, and strong shocks and supersonic winds in homogeneous media. Indexed by author and object, but not by subject. Annotation c. Book News, Inc., Portland, OR (booknews.com)

Book Synopsis Mass Outflow in Active Galactic Nuclei by : D. Michael Crenshaw

Download or read book Mass Outflow in Active Galactic Nuclei written by D. Michael Crenshaw and published by . This book was released on 2002 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Proceedings of a March 2001 workshop held in Washington, D.C., bringing together an international group of researchers to share new developments in the field during the last four years. Fifty-seven contributions are arranged in sections on X-ray absorption and emission; intrinsic UV absorption; broad absorption-line QSOs; narrow- line region, broad-line region and jets; and kinematics and dynamical models. A sampling of topics: high-resolution X-ray spectroscopy of the warm gas in Seyfert 1 galaxies, observations of warm absorbers in AGN, radio-selected broad absorption line quasars, the importance of shocks in the ionization of the narrow line region of Seyferts, and strong shocks and supersonic winds in homogeneous media. Indexed by author and object, but not by subject. Annotation c. Book News, Inc., Portland, OR (booknews.com)

The Interplay Among Black Holes, Stars and ISM in Galactic Nuclei (IAU S222)

Author: International Astronomical Union. Symposium

Publisher: Cambridge University Press

Published: 2004

Total Pages: 608

ISBN-13: 9780521848039

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How massive are the largest and smallest nuclear black holes in galaxies? Why are the masses of nuclear black holes proportional to those of their host galaxy bulges? How is nuclear activity triggered? What are the observational signatures of such processes? What are the connections between the active nucleus, stars and interstellar medium in galaxies? Answers to these questions are addressed in this book, which presents a compilation of 191 works covering recent observations from X-rays to radio wavelengths, as well as theoretical modeling of accretion disks, stellar populations and galaxy and black hole evolution. This volume presents the nuclear activity as a phase in the life of a galaxy, which is intimately connected to the evolution of its stars and interstellar medium. It brings together recent developments in topics covering most aspects of galaxy evolution, and is a valuable resource for astronomers and graduate students working in extragalactic astronomy.

Book Synopsis The Interplay Among Black Holes, Stars and ISM in Galactic Nuclei (IAU S222) by : International Astronomical Union. Symposium

Download or read book The Interplay Among Black Holes, Stars and ISM in Galactic Nuclei (IAU S222) written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2004 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: How massive are the largest and smallest nuclear black holes in galaxies? Why are the masses of nuclear black holes proportional to those of their host galaxy bulges? How is nuclear activity triggered? What are the observational signatures of such processes? What are the connections between the active nucleus, stars and interstellar medium in galaxies? Answers to these questions are addressed in this book, which presents a compilation of 191 works covering recent observations from X-rays to radio wavelengths, as well as theoretical modeling of accretion disks, stellar populations and galaxy and black hole evolution. This volume presents the nuclear activity as a phase in the life of a galaxy, which is intimately connected to the evolution of its stars and interstellar medium. It brings together recent developments in topics covering most aspects of galaxy evolution, and is a valuable resource for astronomers and graduate students working in extragalactic astronomy.

Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies

Author: Mitchell D. Revalski

Publisher:

Published: 2019

Total Pages: 180

ISBN-13:

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Observations reveal that supermassive black holes (SMBHs) grow through the accretion of gas at the centers of galaxies as luminous active galactic nuclei (AGN), releasing radiation that drives powerful outflows of ionized and molecular gas. These winds are thought to play a critical role in galaxy evolution by regulating star formation and the growth of galaxies and their SMBHs. To test this model, we must quantify the dynamic impact of outflows by measuring their mass outflow rates and energetics. Using spatially resolved spectroscopy and imaging from the Hubble Space Telescope and Cloudy photoionization models we mapped the ionized gas kinematics and mass distributions of narrow line region (NLR) outflows in nearby active galaxies. We find that the outflows contain up to several million solar masses of ionized gas and are limited to distances of 1 - 2 kiloparsecs from the nucleus. The maximum mass outflow rates are M = 3 - 12 solar masses per year and the outflow gas mass, velocity, radial extent, and energetics are positively correlated with AGN luminosity. We use our results to test simplified techniques with less stringent data requirements and find that they significantly overestimate the gas mass. These results are crucial for modeling powerful outflows at higher redshift that may considerably influence star formation rates and the formation of galactic structure.

Book Synopsis Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies by : Mitchell D. Revalski

Download or read book Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies written by Mitchell D. Revalski and published by . This book was released on 2019 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations reveal that supermassive black holes (SMBHs) grow through the accretion of gas at the centers of galaxies as luminous active galactic nuclei (AGN), releasing radiation that drives powerful outflows of ionized and molecular gas. These winds are thought to play a critical role in galaxy evolution by regulating star formation and the growth of galaxies and their SMBHs. To test this model, we must quantify the dynamic impact of outflows by measuring their mass outflow rates and energetics. Using spatially resolved spectroscopy and imaging from the Hubble Space Telescope and Cloudy photoionization models we mapped the ionized gas kinematics and mass distributions of narrow line region (NLR) outflows in nearby active galaxies. We find that the outflows contain up to several million solar masses of ionized gas and are limited to distances of 1 - 2 kiloparsecs from the nucleus. The maximum mass outflow rates are M = 3 - 12 solar masses per year and the outflow gas mass, velocity, radial extent, and energetics are positively correlated with AGN luminosity. We use our results to test simplified techniques with less stringent data requirements and find that they significantly overestimate the gas mass. These results are crucial for modeling powerful outflows at higher redshift that may considerably influence star formation rates and the formation of galactic structure.

Active Galactic Nuclei

Author: Francoise Combes

Publisher: John Wiley & Sons

Published: 2022-09-21

Total Pages: 324

ISBN-13: 178945087X

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All galaxies host a super-massive black hole in their center. These black holes grow their mass in symbiosis with their host galaxy and moderate their star formation. When matter is driven towards the nucleus, an accretion disk is formed to transfer angular momentum and considerable energy is released when the material falls into the black hole: this is the phenomenon of active galactic nuclei (AGN). A nucleus can shine one thousand times more brightly than the entire galaxy with its 200 billion stars. The nuclear activity can take many forms, from very powerful quasars to more ordinary Seyfert galaxies, passing by radio-galaxies, which eject a collimated plasma at ten times the radius of the galaxy. This book examines all of these manifestations and presents a unified view. When two galaxies merge, a binary black hole is formed and the two black holes will spiral inwards and merge, emitting long gravitational waves, which could be detected by the future LISA satellite.

Book Synopsis Active Galactic Nuclei by : Francoise Combes

Download or read book Active Galactic Nuclei written by Francoise Combes and published by John Wiley & Sons. This book was released on 2022-09-21 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: All galaxies host a super-massive black hole in their center. These black holes grow their mass in symbiosis with their host galaxy and moderate their star formation. When matter is driven towards the nucleus, an accretion disk is formed to transfer angular momentum and considerable energy is released when the material falls into the black hole: this is the phenomenon of active galactic nuclei (AGN). A nucleus can shine one thousand times more brightly than the entire galaxy with its 200 billion stars. The nuclear activity can take many forms, from very powerful quasars to more ordinary Seyfert galaxies, passing by radio-galaxies, which eject a collimated plasma at ten times the radius of the galaxy. This book examines all of these manifestations and presents a unified view. When two galaxies merge, a binary black hole is formed and the two black holes will spiral inwards and merge, emitting long gravitational waves, which could be detected by the future LISA satellite.

Mass-Transfer Induced Activity in Galaxies

Author: Isaac Shlosman

Publisher: Cambridge University Press

Published: 2003-10-30

Total Pages: 534

ISBN-13: 9780521543309

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How gas flows and starbursts light up active galaxies.

Book Synopsis Mass-Transfer Induced Activity in Galaxies by : Isaac Shlosman

Download or read book Mass-Transfer Induced Activity in Galaxies written by Isaac Shlosman and published by Cambridge University Press. This book was released on 2003-10-30 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: How gas flows and starbursts light up active galaxies.

Black Holes (IAU S238)

Author: International Astronomical Union. Symposium

Publisher: Cambridge University Press

Published: 2007-07-30

Total Pages: 508

ISBN-13: 9780521863476

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IAU S238 report on the physics of black holes, by leading researchers in the field.

Book Synopsis Black Holes (IAU S238) by : International Astronomical Union. Symposium

Download or read book Black Holes (IAU S238) written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2007-07-30 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: IAU S238 report on the physics of black holes, by leading researchers in the field.

Reviews in Modern Astronomy

Author: Gerhard Klare

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 279

ISBN-13: 3642775438

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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.

Book Synopsis Reviews in Modern Astronomy by : Gerhard Klare

Download or read book Reviews in Modern Astronomy written by Gerhard Klare and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Mass Outflow in Active Galactic Nuclei

Author:

Publisher:

Published: 2002

Total Pages: 345

ISBN-13: 9781583810958

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Book Synopsis Mass Outflow in Active Galactic Nuclei by :

Download or read book Mass Outflow in Active Galactic Nuclei written by and published by . This book was released on 2002 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: