Extragalactic Novae

The book begins with a brief introduction to the early observations, including an overview of the role that novae played in the birth of extragalactic astronomy, and concludes with a discussion of how nova observations over the past century ...

Author: Allen W. Shafter

Publisher:

ISBN: 0750312971

Category: Science

Page: 300

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Extragalactic Novae: A historical perspective takes the reader on a journey chronicling the study of a class of eruptive variable stars known as "Novae Stella", Latin for "New Stars". These mysterious transient objects, now referred to simply as novae, have been recognized since antiquity, suddenly appearing in the night sky before slowly fading back into obscurity. The book begins with a brief introduction to the early observations, including an overview of the role that novae played in the birth of extragalactic astronomy, and concludes with a discussion of how nova observations over the past century have contributed to our knowledge of close binary star populations in nearby galaxies. Along the way, the history of our understanding of the nova phenomena, in the Milky Way and beyond, is unveiled. In particular, the author describes how the enigmatic nova eruptions were finally realized to be the result of thermonuclear runaways on the surfaces of accreting white dwarf stars, how a controversial correlation between a nova's peak luminosity and its rate of decline (the MMRD relation) has been used in extragalactic distance determinations, and how recent observations have bolstered the case that novae may form a significant channel for the production of Type Ia supernovae. These topics, and more, are recounted by an observer who has spent the past 35 years studying these fascinating objects.
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Extragalactic Novae

The book begins with a brief introduction to the early observations, including an overview of the role that novae played in the birth of extragalactic astronomy, and concludes with a discussion of how nova observations over the past century ...

Author: Allen Wayne Shafter

Publisher:

ISBN: 0750312963

Category: SCIENCE

Page:

View: 534

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Extragalactic Novae: A historical perspective takes the reader on a journey chronicling the study of a class of eruptive variable stars known as "Novae Stella", Latin for "New Stars". These mysterious transient objects, now referred to simply as novae, have been recognized since antiquity, suddenly appearing in the night sky before slowly fading back into obscurity. The book begins with a brief introduction to the early observations, including an overview of the role that novae played in the birth of extragalactic astronomy, and concludes with a discussion of how nova observations over the past century have contributed to our knowledge of close binary star populations in nearby galaxies. Along the way, the history of our understanding of the nova phenomena, in the Milky Way and beyond, is unveiled. In particular, the author describes how the enigmatic nova eruptions were finally realized to be the result of thermonuclear runaways on the surfaces of accreting white dwarf stars, how a controversial correlation between a nova's peak luminosity and its rate of decline (the MMRD relation) has been used in extragalactic distance determinations, and how recent observations have bolstered the case that novae may form a significant channel for the production of Type Ia supernovae. These topics, and more, are recounted by an observer who has spent the past 35 years studying these fascinating objects.
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Classical Nova Explosions

Early estimates of the Galactic nova rate , which were based solely on
extrapolation of Galactic data , tended to be quite high - on the order of ~ 100 yr- )
. More recent estimates , particularly those based on scalings from extragalactic
nova ...

Author: China) International Conference on Advances in Structural Dynamics (2000 : Hong Kong

Publisher: Amer Inst of Physics

ISBN: UOM:39015056459590

Category: Medical

Page: 590

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The book reviews our current knowledge about Classical Nova Explosions, including all the recent advances from both theoretical and observational points of view. The volume covers a large number of topics, such as the astrophysical scenario, the explosion mechanism (including recent multidimensional approaches), light curves and spectra, and observations based on ground and space facilities, covering all wavelength ranges from radio and infrared to X and gamma-rays. Topics include: novae, cataclysmic variables, nucleosynthesis, white dwarfs, observations (optical, IR, radio, UV, x-rays, gamma-rays).
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Cataclysmic Cosmic Events and How to Observe Them

Some professional patrollers of M31 employ an H-alpha filter for isolating
extragalactic novae and suppressing the central bulge. These cut out a large
percentage of the incoming light, as they typically have bandwidths of only 6 nm
or 7 nm.

Author: Martin Mobberley

Publisher: Springer Science & Business Media

ISBN: 038779946X

Category: Science

Page: 240

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In the Victorian era – or for non-British readers, the mid-to-late nineteenth century – amateur astronomy tended to center on Solar System objects. The Moon and planets, as well as bright comets, were the key objects of interest. The brighter variable stars were monitored, but photography was in its infancy and digital imaging lay a century in the future. Today, at the start of the twenty-first century, amateurs are better equipped than any professionals of the mid-twentieth century, let alone the nineteenth. An amateur equipped with a 30-cm telescope and a CCD camera can easily image objects below magnitude 20 and, from very dark sites, 22 or 23. Such limits would have been within the realm of the 100- and 200-inch reflectors on Mount Wilson and Mount Palomar in the 1950s, but no other observatories. However, even those telescopes took hours to reach such limits, and then the photographic plates had to be developed, fixed, and examined by eye. In the modern era digital images can be obtained in minutes and analyzed ‘on the fly’ while more images are being downloaded. Developments can be e-mailed to other interested amateurs in real time, during an observing session, so that when a cataclysmic event takes place amateurs worldwide know about it. As recently as the 1980s, even professional astronomers could only dream of such instantaneous communication and proc- sing ability.
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Occasional Reports of the Royal Observatory Edinburgh

Fast novae are brighter at maximum ( M . ~ - 10 ) . The first extragalactic
application was to the Magellanic clouds ( Buscombe and de Vaucouleurs 1955 )
. The apparent magnitude m at maximum in the Harvard system obeyed the
relation m ...

Author: Royal Observatory, Edinburgh

Publisher:

ISBN: UOM:39015049320537

Category: Astronomy

Page:

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Allen s Astrophysical Quantities

Recent novae in the Large Magellanic Cloud [ 1 , 2 ] . a ( 2000 ) 8 ( 2000 ) hr min
sec deg min sec IAU Circ . ... First spectroscopically confirmed , extragalactic
recurrent nova ; U Sco analog ( low mass companion , helium rich ) . e FUV , max
 ...

Author: Clabon Walter Allen

Publisher: Springer Science & Business Media

ISBN: 0387987460

Category: Science

Page: 719

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This new edition of Allen's classic "Astrophysical Quantities" belongs on every astronomer's bookshelf. It has been thoroughly revised and updated by a team of internationally renowned team of astronomers and astrophysicists. Topics covered include: * General constants and units * Atoms, molecules, and spectra * Observational astronomy at all wavelengths from radio to gamma-rays, and neutrinos * Planetary astronomy: Earth, planets and satellites, and solar system small bodies * The Sun, normal stars, and stars with special characteristics * Cataclysmic and symbiotic variables, supernovae * Theoretical stellar evolution * Circumstellar and interstellar material * Star clusters, galaxies, quasars, and active galactic nuclei * Clusters and groups of galaxies * Cosmology
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The Spiral Galaxy M33

Only in recent years has it been possible to make more astrophysical
observations of extragalactic novae. In the case of M33, most of the literature
deals only with the detection of novae and attempts to establish their rate of
recurrence. The first ...

Author: P. Hodge

Publisher: Springer Science & Business Media

ISBN: 9400720254

Category: Science

Page: 160

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This book summarizes the gathering of information on and the growing understanding of M33 from the 1920s, when Hubble first determined its true nature, to the 21st century, when the Hubble Telescope probed deeply into its many secrets. With its regular symmetrical spiral structure, and its being not tilted too much and near enough to allow detailed studies of its stars, M33 is well-suited for the study of a typical spiral galaxy. In this work, Paul Hodge places current research on M33 (and similar galaxies) in both historical and global perspectives. The book is written in a language accessible for specialists and non-specialists, for professional and amateur astronomers, for scientists and the curious public and, most importantly, for students.
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Bridging the Gap

The P60FasTING nova sample includes 10 novae in M 31, 6 in M 81, 3 in M 82, 1
in NGC 2403 and 1 in NGC 891. This significantly expands the known sample of
extragalactic novae beyond the Local Group, including the first discoveries in a ...

Author: Mansi M. Kasliwal

Publisher: Universal-Publishers

ISBN: 9781612337753

Category: Science

Page: 224

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For centuries, we have known that our dynamic universe is adorned by cosmic fireworks: energetic and ephemeral beacons of light from a single star that are a million (nova) to a billion (supernova) times brighter than our sun. However, it had been an age-old conundrum that the brightest nova is approximately 1000 times fainter than the faintest supernova; why should nature leave such a wide "gap"? In search of an answer, I undertook three systematic surveys for my thesis. Since I was looking for transients fainter, faster and rarer than supernovae, I focused my search on galaxies in the local universe. We now have convincing evidence of multiple, distinct populations of rare transients bridging this "gap." Perhaps, we are witnessing new stellar physics- shell detonations in ultra-compact white dwarf binaries, electron-capture supernovae, white dwarfs collapsing into neutron stars and birth of black-holes. A small number of intensively followed-up discoveries of elusive transients sets the stage for population studies with the upcoming "Large Synoptic Survey Telescope." This effort works towards building a complete inventory of transients in the local universe (d
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The Extragalactic Distance Scale

1989 ) Lp = 4.6 x 104 ( Mwd / M . - 0.26 ) ( 4.8 ) Lo If we combine this fact with the
expectation that ~ 30 % of all novae have white dwarf masses in the range 0.8-
1.2M . ( Ritter et al . 1991 ) , we immediately realize that the plateau luminosity
can ...

Author: Space Telescope Science Institute (U.S.). Symposium

Publisher: Cambridge University Press

ISBN: 0521591643

Category: Science

Page: 325

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The hottest debate in astronomy and cosmology today is the value of the Hubble Constant that fixes the size and age of the Universe. At a workshop at the Space Telescope Science Institute, experts from around the world presented the latest results from a plethora of techniques for determining the Hubble Constant. The value has always been controversial, but for the first time at this meeting experts' results agreed, to within twenty percent. The articles in this book provide a comprehensive account of the Hubble Constant debate with the latest results from gravitational lensing, supernovae and novae, the Tully-Fisher relation, the Sunyaev-Zeldovich effect, globular clusters, planetary nebulae, light echoes, and the Hubble Space Telescope Key Project. This timely volume will become a standard reference for graduate students and researchers in astronomy and cosmology.
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The Extragalactic Distance Scale

TIME AVERAGED NOVA LUMINOSITY FUNCTIONS One of the biggest , if not
the biggest difficulty in using nova light curves for extragalactic distance
estimates is logistical rather than scientific . The problem is illustrated by PvdB's
heroic ...

Author: ASP 100th Anniversary Symposium

Publisher: Astronomical Society of the pacific

ISBN: UOM:39015014243334

Category: Science

Page: 385

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Ultraviolet optical Space Astronomy Beyond HST

Both galactic and extragalactic novae have been proposed as potential standard
candles . Recent work by Della Valle & Livio ( 1995 ) has improved on the
standard relations ( e . g . , Schmidt 1957 ; Pfau 1976 ; Cohen 1985 ; Livio 1992 )
by ...

Author: Jon A. Morse

Publisher:

ISBN: UOM:39015043098329

Category: Astronomy

Page: 468

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Topics in Extragalactic Astronomy with Special Reference to the Southern Hemisphere

Fast novae are brighter at maximum ( M. ~ -10 ) . The first extragalactic
application was to the Magellanic Clouds ( Buscombe and de Vaucouleurs 1955
) . The apparent magnitude mo at maximum in the Harvard system . obeyed the
relation m ...

Author: Gérard De Vaucouleurs

Publisher: Royal Observatory Edinburgh

ISBN: UVA:X001388213

Category: Astronomy

Page: 125

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Chemical and Dynamical Evolution of Galaxies

Introduction The Astrophysical Observatory of Asiago since many years is
carrying out a program of observation of galactic and extragalactic novae . I
should like , in this occasion , to summarize some of the results hitherto obtained ,
some ...

Author: Federico Ferrini

Publisher: ETS

ISBN: PSU:000032543681

Category: Science

Page: 684

View: 912

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Vistas in Astronomy

The mechanism of ejection of matter from novae by E. R. MUSTEL ( Simeis ,
Crimea ) On the nature of physical ... S. EVANS ( Pretoria ) Galactic and
extragalactic studies at the Harvard Observatory by Harlow SHAPLEY (
Cambridge , Mass . ) ...

Author:

Publisher:

ISBN: UCAL:B3957163

Category: Astronomy

Page:

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A Population Explosion

Although still rather sparse , the existing data are consistent with the hypothesis
that all classical novae are transient 2 - 10 ... of 24 novae / yr has been measured
by Della Valle & Livio ( 1904 ) by scaling from extragalactic nova surveys ( Della
 ...

Author: Reba Bandyopadhyay

Publisher: American Institute of Physics

ISBN: UCSD:31822030085302

Category: Science

Page: 420

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Technological advances in X-ray astronomy have recently led to the discovery of a large number of previously undetected accreting binaries, increasing by an order of magnitude their known population in the Galaxy. This meeting addressed the current state of observational and theoretical research into the X-ray binary population as a whole, including both well-studied systems and the newly discovered populations, and examined the interaction of X-ray binaries with their environment within our own Galaxy and in external galaxies.
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Contributi Dell Osservatorio Astrofisico Di Asiago

Contributi Asiago N . 278 Discovery of Five Novae in Messier 33 and a
Supernova in a Field Galaxy L . Rosino and A ... from 1966 to the present , all
centered in the spiral galaxy Messier 33 , have been examined for extragalactic
novae .

Author: Università di Padova. Osservatorio astrofisico

Publisher:

ISBN: UCSC:32106020651623

Category: Astronomy

Page:

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Deep Sky

The absolute magnitudes of novae at maximum fall within a fairly narrow range of
brightness and are correlated with the rate of decline following an outburst . Thus
they are fair distance indicators if we assume extragalactic novae are similar to ...

Author:

Publisher:

ISBN: UCSC:32106013206989

Category: Astronomy

Page:

View: 293

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Galactic and Extragalactic Astrophysics

This may be the rea - son for which type la SN and novae are both more frequent
along the jets of galaxies ( Capetti , 2002 ; Livio et al . , 2002 ) . In any case , X -
ray observations of supersoft X - ray sources offer a way to learn how hydrogen ...

Author:

Publisher:

ISBN: UOM:39015069177874

Category: Astrophysics

Page: 293

View: 316

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