asteroseismic-data-analysis

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Asteroseismic Data Analysis

Author : Sarbani Basu
ISBN : 9780691162928
Genre : Science
File Size : 72. 84 MB
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Studies of stars and stellar populations, and the discovery and characterization of exoplanets, are being revolutionized by new satellite and telescope observations of unprecedented quality and scope. Some of the most significant advances have been in the field of asteroseismology, the study of stars by observation of their oscillations. Asteroseismic Data Analysis gives a comprehensive technical introduction to this discipline. This book not only helps students and researchers learn about asteroseismology; it also serves as an essential instruction manual for those entering the field. The book presents readers with the foundational techniques used in the analysis and interpretation of asteroseismic data on cool stars that show solar-like oscillations. The techniques have been refined, and in some cases developed, to analyze asteroseismic data collected by the NASA Kepler mission. Topics range from the analysis of time-series observations to extract seismic data for stars to the use of those data to determine global and internal properties of the stars. Reading lists and problem sets are provided, and data necessary for the problem sets are available online. The first book to describe in detail the different techniques used to analyze the data on stellar oscillations, Asteroseismic Data Analysis offers an invaluable window into the hearts of stars. Introduces the asteroseismic study of stars and the theory of stellar oscillations Describes the analysis of observational (time-domain) data Examines how seismic parameters are extracted from observations Explores how stellar properties are determined from seismic data Looks at the “inverse problem,” where frequencies are used to infer internal structures of stars

Asteroseismology And Exoplanets Listening To The Stars And Searching For New Worlds

Author : Tiago L. Campante
ISBN : 9783319593159
Genre : Science
File Size : 67. 57 MB
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This book presents the proceedings of the IVth Azores International Advanced School in Space Sciences entitled "Asteroseismology and Exoplanets: Listening to the Stars and Searching for New Worlds". The school addressed the topics at the forefront of scientific research being conducted in the fields of asteroseismology and exoplanetary science, two fields of modern astrophysics that share many synergies and resources. These proceedings comprise the contributions from 18 invited lecturers, including both monographic presentations and a number of hands-on tutorials.

Asteroseismology

Author : C. Aerts
ISBN : 1402058039
Genre : Science
File Size : 30. 46 MB
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Understanding the stars is the bedrock of modern astrophysics. Stars are the source of life. The chemical enrichment of our Milky Way and of the Universe withallelementsheavierthanlithiumoriginatesintheinteriorsofstars.Stars arethe tracersofthe dynamics ofthe Universe,gravitationallyimplying much more than meets the eye. Stars ionize the interstellar medium and re-ionized the early intergalactic medium. Understanding stellar structure and evolution is fundamental. While stellar structure and evolution are understood in general terms, we lack important physical ingredients, despite extensive research during recent decades.Classicalspectroscopy,photometry,astrometryandinterferometryof stars have traditionally been used as observational constraints to deduce the internal stellar physics. Unfortunately, these types of observations only allow the tuning of the basic common physics laws under stellar conditions with relatively poor precision. The situation is even more worrisome for unknown aspects of the physics and dynamics in stars. These are usually dealt with by using parameterised descriptions of, e.g., the treatments of convection, rotation,angularmomentumtransport,theequationofstate,atomicdi?usion andsettlingofelements,magneto-hydrodynamicalprocesses,andmore.There is a dearth of observational constraints on these processes, thus solar values areoftenassignedtothem.Yetitishardtoimaginethatonesetofparameters is appropriate for the vast range of stars.

Variability Of The Sun And Sun Like Stars From Asteroseismology To Space Weather

Author : J-P Rozelot
ISBN : 9782759821969
Genre : Science
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This book is based on contributions presented at the first International Conference on Solar Physics which was organized in Baku, Azerbaijan in July 06–08, 2015, by the Science Development Foundation under the President of the Republic of Azerbaijan. The primary goals were to highlight specific aspects of modern solar physics research, including observation and theory that span from the interior of the Sun out into the wider heliosphere, as well as solar-terrestrial physics and particularly, sun-like stars. The Sun is a variable star. However, we are still far from fully understanding what and how causes this variability. Why does the Sun continue to go on, on a rhythmic scale, the so-called solar cycle, without damping? How to better understand the complicated relationships between the Sun, the heliosphere and the many proxies of long-term solar activity? How the data could be fully exploited for a better understanding of solar changes on the longest possible time scales? How our knowledge on the Sun can be transfer to other stars? What are the impacts on our terrestrial environment? These questions shape the architecture of the book. It will be of interest and useful to scientists and graduate level readers who would like to better master such up-to-date topics.

Issues In Astronomy And Astrophysics 2011 Edition

Author :
ISBN : 9781464963681
Genre : Science
File Size : 22. 78 MB
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Issues in Astronomy and Astrophysics / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Astronomy and Astrophysics. The editors have built Issues in Astronomy and Astrophysics: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Astronomy and Astrophysics in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Astronomy and Astrophysics: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Asteroseismology

Author : Pere L. Pallé
ISBN : 9781107470620
Genre : Science
File Size : 62. 17 MB
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Our understanding of stars has grown significantly due to recent advances in asteroseismology, the stellar analog of helioseismology, the study of the Sun's acoustic wave oscillations. Using ground-based and satellite observatories to measure the frequency spectra of starlight, researchers are able to probe beneath a star's surface and map its interior structure. This volume provides a wide-ranging and up-to-date overview of the theoretical, experimental and analytical tools for carrying out front-line research in stellar physics using asteroseismological observations, tools and inferences. Chapters from seven eminent scientists in residence at the twenty-second Canary Islands Winter School of Astrophysics examine the interior of our Sun relative to data collected from distant stars, how to measure the fundamental parameters of single field stars, diffusion processes, and the effects of rotation on stellar structures. The volume also provides detailed treatments of modeling and computing programs, providing astronomers and graduate students a practical, methods-based guide.

Highlights Of Astronomy

Author : International Astronomical Union
ISBN : UOM:39015060946814
Genre : Astronomy
File Size : 80. 79 MB
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Vol. 1- contain papers, etc., from 13th- General Assembly.

Investigating The A Type Stars Using Kepler Data

Author : Simon J. Murphy
ISBN : 9783319094175
Genre : Science
File Size : 33. 2 MB
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Simon Murphy's thesis has significant impact on the wide use of the revolutionary Kepler Mission data, leading to a new understanding in stellar astrophysics. It first provides a deep characterisation and comparison of the Kepler long cadence and short cadence data, with particular insight into the Kepler reduction pipeline. It then brings together modern reviews of rotation and peculiarities in A-type stars, and their relationship with the pulsating delta Scuti stars. This is the first combined review of these subjects since the classic monograph by Sydney Wolff, "The A stars," was published three decades ago. The thesis presents a novel technique, Super-Nyquist Asteroseismology, that has opened up the asteroseismic study of thousands of Kepler stars. It shows case studies of delta Scuti stars examining amplitude growth, super-Nyquist pulsation, and pulsation in a high-amplitude, population II SX Phoenicis star in a 343-d binary. This work informs our understanding of the relation of rotation to peculiarity, hence has applications to atomic diffusion theory. This is a brilliant thesis written in an elegant and engaging style.

Asteroseismology Across The Hr Diagram

Author : Michael J. Thompson
ISBN : 1402011733
Genre : Mathematics
File Size : 23. 1 MB
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This book aims to facilitate a cross-fertilisation of ideas and approaches between fields covering different pulsators and with different areas of expertise. The book successfully covers most known types of pulsators, reflecting a highly productive and far reaching interchange of ideas which we believe is conveyed by the papers and posters published, making it a reference for researchers and postgraduate students working on stellar structure and evolution.

Methods In Helio And Asteroseismology

Author : Frank P. Pijpers
ISBN : UOM:39015073966023
Genre : Science
File Size : 72. 17 MB
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This book discusses the methods used in helio- and asteroseismology for the collection, analysis and interpretation of data. It is the first comprehensive discussion of helioseismic and asteroseismic methodology, collecting techniques from over 300 research papers spread out over decades, with a critical discussion and inter-comparison. It enables the reader to follow the path of inference from the collection of the data at the telescope through to the understanding gained in terms of the modeling of solar and stellar physics and stellar evolution.By focusing on how results are obtained, rather than on the results themselves, this book provides the essential background needed to understand this field, which is rapidly advancing due to the availability of modern observing facilities both on the ground and in space. The material is accessible for advanced undergraduates and post-graduates, and provides an essential resource for researchers in the field.

Helioseismology Asteroseismology And Mhd Connections

Author : Laurent Gizon
ISBN : 9780387894829
Genre : Science
File Size : 72. 71 MB
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This collection of papers offers a timely snapshot of helio- and asteroseismology in the era when SOHO/MDI instrument is about to be replaced by SDO/HMI and when the CoRoT space mission is yielding its first long-duration light curves of thousands of stars.

Astronomical Data Analysis Software And Systems

Author :
ISBN : UCAL:$B448753
Genre : Astronomy
File Size : 56. 26 MB
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Astronomical Data Analysis Software And Systems Vi

Author : Gareth Hunt
ISBN : STANFORD:36105022780741
Genre : Astronomy
File Size : 57. 68 MB
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Monthly Notices Of The Royal Astronomical Society

Author :
ISBN : UOM:39015089015278
Genre : Astronomy
File Size : 89. 44 MB
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Portfolio of 8 charts accompanies v. 83.

Accurate Red Giant Distances And Radii With Asteroseismology

Author : Joel Coyle Zinn
ISBN : OCLC:1155911581
Genre : Astroseismology
File Size : 51. 67 MB
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Four billion years from now, the Sun will evolve into a red giant: its surface will become a thousand degrees cooler, and it will grow to be tens of times larger. Because of their size, red giants like the future Sun can shine hundreds of times brighter than the Sun, and can be seen from the farthest reaches of our Galaxy. As such, they are important tracers for studies of the evolution of the dynamics and structure of the Galaxy. Knowing the distances to these stars is essential for such work, as is knowing their intrinsic stellar properties like mass and radius, which in combination with stellar models yield ages. In this dissertation, I use data from space-based missions Kepler, K2, and Gaia to test the accuracy of red giant distances and radii that can be derived from theoretical relations between the stellar radius and photometric variability induced by sound waves on the stellar surface---a technique within the scope of what is known as asteroseismology. I begin by presenting the Bayesian Asteroseismology data Modeling (BAM) pipeline, an automated asteroseismology pipeline that returns oscillation parameters that describe the essential characteristics of the sound waves supported in the stellar interior and that are seen on the surface as photometric variability ("solar-like" oscillations). The parameters BAM estimates can be used to yield asteroseismic masses and radii. I have designed BAM to specially process K2 light curves, which suffer from unique noise signatures that can confuse asteroseismic analysis, though it may be used on any photometric time series---including those from Kepler and its successor, TESS. I then turn to testing the asteroseismic red giant distance and radius scale with Gaia parallaxes and Kepler asteroseismology. I am able to simultaneously test both the asteroseismic and Gaia systematics in distances and radii, self-consistently calibrating them. Using the first data release of Gaia parallaxes, I present evidence for a spatially-dependent systematic error based on comparisons to asteroseismic parallaxes in the Kepler field, and present a parametrized model of the angular dependence of these systematics. I build on this methodology to present an independent confirmation of the zero-point offset noted by the Gaia team present in Gaia Data Release 2 (DR2) parallaxes. I also quantify the spatially-correlated DR2 parallax errors in the Kepler field, and find that the amplitude of these correlations are in global agreement with the covariances published by the Gaia team. I use this corrected Gaia distance scale to compare asteroseismic radii of 500 dwarfs and 3,600 red giants from the Kepler mission to radii based on Gaia parallaxes. The agreement, when accounting for corrections to the Gaia parallaxes, is within 2% ± 2% (syst.) for stars with radii between 0.8R☉ and 30R☉. I identify differential trends as a function of radius in the radius agreement at the 2% ± 2% (syst.) level. I find that asteroseismic dwarf radii are on a parallactic scale at the 2% ± 2% (syst.) level, which supports recent comparisons between asteroseismic radii and Gaia radii for dwarfs. For giants, I conclude asteroseismic radii are on the parallactic scale to within 1% ± 2% (syst.).

Gong 94

Author : R. K. Ulrich
ISBN : UOM:39015034524747
Genre : Astronomy
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Astronomical Data Analysis Software And Systems Xvii

Author : Robert W. Argyle
ISBN : 1583816585
Genre : Computers
File Size : 49. 12 MB
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New Eyes To See Inside The Sun And Stars

Author : Franz-Ludwig Deubner
ISBN : 0792350766
Genre : Science
File Size : 39. 98 MB
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The cover picture of this volume displays one of the most advanced products of he lioseismic research: a view into the deep interior of the sun, revealing its distinctly non-uniform rotation throughout the entire depth of the convection zone. Just over 20 years ago, the first successful helioseismic experiment disclosed an increase of ro tation velocity in the uppermost one dozen megameters below the photosphere. The stunning progress in depth and detail highlighted by the cover diagram (and by others shown in this volume as well) was made possible by considerable advances in instru mentation, by the development of powerful analytical tools and, foremost, by the involvement of new brains of enthusiastic proselytes and newcomers to the field, in creasing nearly exponentially in number every year. New branches of research widened the scope of "uranoseismology", as e. g. time-distance seismology (the promising av enue towards small-scale and short-time variability), atmospheric seismology (a new look at strange phenomena we have all ways seen, but hardly understood), and finally the growing observational assault on hundreds of individual stars which are either manifestly or supposedly oscillating -i. e. asteroseismology. The formation of numer ous solar and stellar observing networks and, ultimately, space missions like SOHO have greatly promoted the potential of this science. This steady progress was accompanied by workshops, colloquia, and symposia in quick succession.

The Ages Of Stars Iau S258

Author : International Astronomical Union. Symposium
ISBN : UOM:39015080771366
Genre : Science
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IAU S258 discusses the problem of estimating ages of stars and stellar populations, a difficult challenge in astrophysics.

Extraterrestrial Seismology

Author : Rafael A. García
ISBN : 9781107041721
Genre : Science
File Size : 75. 10 MB
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Taking a transdisciplinary approach to seismology, this unique book reviews the most recent developments in planetary seismology, helioseismology, and asteroseismology.

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