Results 311 to 320 of about 976,493 (346)
Star formation and the ages of stars [PDF]
EAS Publications Series, 2014 In this contribution we illustrate how the knowledge of the ages of stars is important to constrain star formation processes. We focus on two specific cases: star formation around the supermassive black hole at the center of the Galaxy and triggered star formation on the borders of Hii regions.
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The Formation of Sunlike Stars [PDF]
Science, 1990 Understanding how stars like the sun formed constitutes one of the principal challenges confronting modern astrophysics. In recent years, advances in observational technology, particularly at infrared and millimeter wavelengths, have produced an avalanche of critical data and unexpected discoveries about the process of star formation, which is blocked ...
Charles J. Lada, Frank H. Shu
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Contemporary Physics, 2005
We review the process of star formation, detailing the theories underlying the stability of molecular clouds and their collapse to protostars, and discussing the empirical evidence and models which inform them. We give emphasis to the role that the magnetic field plays in influencing the stability of molecular clouds and hence the star formation rate ...
Antonio Chrysostomou, Phil Lucas
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We review the process of star formation, detailing the theories underlying the stability of molecular clouds and their collapse to protostars, and discussing the empirical evidence and models which inform them. We give emphasis to the role that the magnetic field plays in influencing the stability of molecular clouds and hence the star formation rate ...
Antonio Chrysostomou, Phil Lucas
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2004
Preface. I Star Formation in Our Galaxy. 1 Overview. 1.1 Stellar Nurseries: Orion. 1.2 Stellar Nurseries: Taurus-Auriga. 1.3 Stars and Their Evolution. 1.4 The Galactic Context. 2 The Interstellar Medium. 2.1 Galactic Gas and Its Detection. 2.2 Phases of the Interstellar Medium. 2.3 Interstellar Dust: Extinction and Thermal Emission.
Francesco Palla, Steven W. Stahler
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Preface. I Star Formation in Our Galaxy. 1 Overview. 1.1 Stellar Nurseries: Orion. 1.2 Stellar Nurseries: Taurus-Auriga. 1.3 Stars and Their Evolution. 1.4 The Galactic Context. 2 The Interstellar Medium. 2.1 Galactic Gas and Its Detection. 2.2 Phases of the Interstellar Medium. 2.3 Interstellar Dust: Extinction and Thermal Emission.
Francesco Palla, Steven W. Stahler
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The Formation of Massive Stars
Astronomische Nachrichten, 2004B 01 A Massive Accretion Disk in M17 B 02 A VLT/ISAAC Study of the Cluster in M17 B 03 Multi-line Observations of the ON-1 Molecular Cloud/H II Region B 04 VLA 7 mm Observations Toward the Pumping Heart of GGD27 B 05 Stellar Masers in Massive Star Forming Regions B 06 The Decay of Massive Cores of Young Star Clusters
Rolf Chini +5 more
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1992
Our galaxy is composed of billions of stars concentrated in the galactic plane, surrounded by interstellar gas, which is mainly composed of hydrogen. About half of the hydrogen is distributed uniformly in the galaxy; the other half is concentrated in interstellar clouds.
C. De Loore, Claude Doom
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Our galaxy is composed of billions of stars concentrated in the galactic plane, surrounded by interstellar gas, which is mainly composed of hydrogen. About half of the hydrogen is distributed uniformly in the galaxy; the other half is concentrated in interstellar clouds.
C. De Loore, Claude Doom
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Formation of Stars and Planets
Astronomische Nachrichten, 2004A01 Modeling the Resonant Planetary System GJ 876 A02 First Classification of Dusty Protoplanets A03 IDL-Models of Infrared Emission from Dust Objects (Applied to Dust in Comets) A04 Theoretical Predicitions and Observational Tests of the Migration Hypothesis A05 Towards Characterization of Exoplanetary Spectra with the VLT ...
Günther Wuchterl, Eike W. Guenther
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Physics Today, 1948
If research in astronomy had stopped in 1913, our knowledge of stellar evolution today would be in a satisfactory state. At that time astronomers had a plausible theory of a star's life cycle. Einstein's theory of relativity, advanced only a few years before, showed that mass and energy were interchangeable.
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If research in astronomy had stopped in 1913, our knowledge of stellar evolution today would be in a satisfactory state. At that time astronomers had a plausible theory of a star's life cycle. Einstein's theory of relativity, advanced only a few years before, showed that mass and energy were interchangeable.
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From Local Star Formation to Global Star Formation
Astrophysics and Space Science, 2002In this brief report we summarise the most important points raised in the course of a two-hour evening discussion session on the above topic, organised by the author. Major questions that were debated included the universality of the IMF, the history of the star formation rate in the solar neighorhood, the star formation efficiency in molecular clouds,
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Perspectives on star formation: the formation of high-mass stars
Proceedings of the International Astronomical Union, 2017AbstractThe formation process of high-mass stars has puzzled the astrophysical community for decades from both a theoretical and an observational point of view. Here, we present an overview of the current theories and status of the observational research on this field, outlining the progress achieved in recent years on our knowledge of the initial ...
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