Mapping Milky Way Dust in 3D With Stellar Photometry PDF Download

Author: Gregory Maurice Green
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
The map can be queried or downloaded at http://argonaut.skymaps.info. I expect the three-dimensional reddening map presented here to find a wide range of uses, among them correcting for reddening and extinction for objects embedded in the plane of the Galaxy, studies of Galactic structure, calibration of future emission-based dust maps and determining distances to objects of known reddening. The method we present is not limited to the passbands of the Pan-STARRS 1 and 2MASS surveys, but may be extended to incorporate photometry from other optical and near-infrared surveys, such as WISE, Spitzer GLIMPSE, UKIDSS, SDSS (where available), and in the future, LSST and Gaia. The method can also be naturally extended to stellar kinematic data, such as that soon to be released by Gaia.

Author: International Astronomical Union. Symposium
Publisher: Cambridge University Press
ISBN: 9780521874700
Category : Science
Languages : en
Pages : 620

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Book Description
State-of-the-art review of the growing field of astrometry, for researchers and graduate students.

Author: Alexander Elizarov
Publisher: Springer Nature
ISBN: 3030519139
Category : Computers
Languages : en
Pages : 251

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Book Description
This book constitutes the post-conference proceedings of the 21st International Conference on Data Analytics and Management in Data Intensive Domains, DAMDID/RCDL 2019, held in Kazan, Russia, in October 2019. The 11 revised full papers presented together with four invited papers were carefully reviewed and selected from 52 submissions. The papers are organized in the following topical sections: advanced data analysis methods; data infrastructures and integrated information systems; models, ontologies and applications; data analysis in astronomy; information extraction from text; distributed computing; data science for education.

Author: E. J. Alfaro
Publisher: Cambridge University Press
ISBN: 9780521481779
Category : Science
Languages : en
Pages : 384

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Book Description
This review examines all the key physical processes involved in the formation and evolution of the Milky Way, based on an international meeting held in Granada (Spain).

Author: Tim-Oliver Husser
Publisher: Universitätsverlag Göttingen
ISBN: 3863950925
Category :
Languages : en
Pages : 194

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Book Description
Globular clusters are gravitationally bound collections of hundreds of thousands of stars that are almost as old as the Universe itself. Although they have been studied for hundreds of years, their formation and evolution is not yet fully understood. We want to fi nd answers to some of the major questions by investing a large amount of observing time with MUSE, the upcoming 2nd generation instrument for ESOś Very Large Telescope. In this thesis I discuss the current state of research on globular clusters as well as the possibilities of this new instrument. Numerical methods for the analysis of MUSE data are presented, including a comprehensive library of synthetic spectra that has been created just for this purpose. The application of these methods to both synthetic and real data is discussed with particular emphasis on a "dry run" that has been conducted for MUSE. Finally, a potential program for the observation of globular clusters is presented.

Author: Robert L. Booker
Publisher:
ISBN:
Category : Photometry
Languages : en
Pages : 88

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Author: Andrea Miglio
Publisher: Springer Science & Business Media
ISBN: 3642184189
Category : Science
Languages : en
Pages : 187

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Exciting results are blooming, thanks to a convergence between unprecedented asteroseismic data obtained by the satellites CoRoT and KEPLER, and state-of-the-art models of the internal structure of red giants and of galactic evolution. The pulsation properties now available for thousands of red giants promise to add valuable and independent constraints to current models of structure and evolution of our galaxy. Such a close connection between these domains opens a new very promising gate in our understanding of stars and galaxies. In this book international leaders in the field offer a wide perspective of the recent advancements in: Asteroseismology of red giants Models of the atmosphere, internal structure, and evolution of red giants Stellar population synthesis and models of the Milky Way

Author: Lucky Puspitarini
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
Multi-wavelength observations in emission of interstellar medium or matter (ISM) are providing increasingly detailed maps. Unfortunately, precise information on distances to the emitting clouds is still lacking. This leads to difficulties in interpreting and modeling ISM distribution and evolution. One way to obtain three-dimensional (3D) descriptions of the ISM, which comprise direction and distance information, is to record a large set of individual absorption measurements or reddening measurements toward target stars at various known distances and directions. These line-of-sight data give hints about the distribution of matter relative to the target star, and the inversion of these measurements using a robust tomographic method can provide the spatial distribution of the ISM. 3D ISM maps are a potential tool of wide use, but accurate and detailed maps are still lacking because absorption data are still limited and information of distances to the target stars are lacking or uncertain. The situation will greatly improve thanks to current and future massive stellar surveys from ground, and to the Gaia mission. Extracting interstellar (IS) absorption data from a large number of stellar spectra requires automated tools. Some of the works presented in this thesis contribute to the preparation of these tools. The tools are adapted to different IS tracers, such as NaI lines, CaII lines, and diffuse interstellar bands (DIBs). Despite their unknown carriers, DIBs are a promising tool to trace IS clouds, in particular at large distances as they are not easily saturated. IS lines or bands are usually extracted from early-type star spectra because of their smooth and easily fitted continua. However, early-type stars are a small fraction of the potential targets. The mean distance between them is too large to allow a good spatial resolution for the ISM mapping. Recently, progress was made on the extraction of IS tracers from late-type star spectra, in particular using a synthetic stellar spectrum. The spectral analysis tools are therefore adapted to different stellar spectrum types, early- or late-type star. Furthermore, we have developed a global analysis to fit multiple tracers simultaneously, allowing us to understand their relationships and to derive their kinematic information at the same time. Gaia is a mission of the European Space Agency (ESA) which was recently launched on 19th December 2013. Not only it will revolutionize our knowledge of the structure and the history of our Galaxy, but also of the distribution of ISM. It will provide precise distances which will greatly improve the constraints during the inversion. It will also provide spectroscopic data allowing the study of a particular DIB at 8620 \AA\ (Gaia DIB), providing more IS absorption data, and also photometric and spectroscopic information on a billion stars allowing accurate estimates of the extinction. Apart from the satellite, a support survey mission with a high-resolution ground-based spectrograph, the Gaia-ESO Spectroscopic Survey (GES), will provide a large number additional new IS absorption data that will be available for the 3D ISM maps. In this thesis, our spectral analysis tools were tested and applied to GES data and to various spectroscopic data from the TBL/NARVAL, OHP 1.93 m/ELODIE, and ESO 2.2 m/FEROS instruments, and from the GOSSS (Galactic O stars Spectroscopic Survey) project. The target stars are widely distributed in the sky, e.g., in southern sky, in high-latitude Galactic HI shells, and in the direction of specific objects, e.g., the M4 cluster, the Carina nebula, the NGC 4815 and gamma-Vel open clusters, and various fields like the CoRoT fields, the Galactic inner-disk or the bulge. Our results show that DIBs can trace the ISM distribution and kinematics at the Galactic scale. They can be used to trace the Galactic arms. Radial velocities of the DIBs were found in agreement with HI emission spectral features and gaseous IS NaI lines velocities.Finally, we tested the inversion method using simulated data and the reconstruction of the distribution. We also showed that 3D ISM maps are useful in many respects, not only in describing ISM distribution, but also helping to understand the physical and chemical conditions in the ISM. For example, our most recent 3D ISM map helps describing Gould Belt properties, nearby cavities or bubbles, and especially determining Local Bubble (LB) properties owing to the comparison with soft X-ray emission maps.

Author: Dap Hartmann
Publisher: Cambridge University Press
ISBN: 9780521471114
Category : Science
Languages : en
Pages : 252

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Book Description
Containing maps showing the distribution of emissions from atomic hydrogen, this is an important reference source for astronomers in many different fields of research.Atomic hydrogen, the principal component of the interstellar medium, was measured over a 5-year period using the 25-meter radio telescope of the NFRA. Displayed in several projections, each map corresponds to a particular velocity interval.A CD-ROM also accompanies the Atlas, and contains the entire dataset of the Leiden/Dwingeloo survey, color images in GIF format, and animations displaying the 3-dimensional data cube.

Author: Nicola R. Napolitano
Publisher: Springer
ISBN: 3319193309
Category : Science
Languages : en
Pages : 296

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Book Description
These are the proceedings of a meeting in honour of Massimo Capaccioli at the occasion of his 70th birthday. The conference aimed at summarizing the results from the main current and past digital sky survey projects and at discussing how these can be used to inspire ongoing projects and better plan the future ones. Over the last decades, digital sky surveys performed with dedicated telescopes and finely-tuned wide-field cameras, have revolutionized astronomy. They have become the main tool to investigate the nearby and far away universe, thus providing new insights in the understanding of the galaxy structure and assembly across time, the dark components of the universe, as well as the history of our own galaxy. They have also opened the time domain leading to a new understanding of the transient phenomena in the universe. By providing public access to top quality data, digital surveys have also changed the everyday practice of astronomers who have become less dependent on direct access to large observing facilities. The full scientific exploitation of these surveys has also triggered significant advances in both space and ground based technology and in the field of multi-object spectroscopy. The various sections of this book are devoted to different relevant aspects of astrophysics in the era of digital sky surveys and include both review and shorter, more focused contributions.