Results 221 to 230 of about 83,866 (252)

Primordial Rotating Disk Composed of ≥15 Star Forming Clumps at Cosmic Dawn

Fujimoto S, Ouchi M, Kohno K, Valentino F, Giménez-Arteaga C, Brammer G, Furtak L, Kohandel M, Oguri M, Pallottini A, Richard J, Zitrin A, Bauer F, Boylan-Kolchin M, Dessauges-Zavadsky M, Egami E, Finkelstein S, Ma Z, Smail I, Watson D, Hutchison T, Rigby J, Welch B, Ao Y, Bradley L, Caminha G, Caputi K, Espada D, Endsley R, Fudamoto Y, González-López J, Hatsukade B, Koekemoer A, Kokorev V, Laporte N, Lee M, Magdis G, Ono Y, Rizzo F, Shibuya T, Shimasaku K, Sun F, Toft S, Umehata H, Wang T, Yajima H.   +45 more
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Extreme energy in a relaxed galaxy group indicates the bursty nature of AGN feedback

Eckert D, Gastaldello F, Lovisari L, McGee S, Pasini T, Brienza M, Kolokythas K, O'Sullivan E, Simionescu A, Sun M, Bourne M, Chen Y, Cui W, Ettori S, Finoguenov A, Gozaliasl G, Kale R, Mernier F, Oppenheimer B, Schellenberger G, Seppi R, Tempel E.   +21 more
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Ice ages and the Galaxy

Nature, 1975
The passage of the Solar System through a dust lane bordering a spiral arm of the Galaxy may cause a temporary variation of the Sun's radiation and so lead to an ice epoch on Earth.
Craig B. Hatfield, Raymond M. Redheffer
exaly   +3 more sources

Dependence of the clustering properties of galaxies on galaxy age

Chinese Journal of Physics, 2016
Abstract From the Main galaxy data of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10), we construct two volume-limited samples with the luminosity −20.5 ≤ M r  ≤−18.5 and −22.5 ≤ M r  ≤−20.5, respectively, and explore the dependence of the clustering properties of galaxies on galaxy age by cluster analysis.
Xin-Fa Deng, Xiao-Ping Qi, Ping Wu, Peng Jiang, Jun Song, Ying-Ping Ding   +5 more
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The age of the galaxy

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1961
Abstract Evidence recently obtained from two quite independent sources suggests that the age of our galaxy is at least as great as 1.5 × 1010 years. It has been suggested that the age might be as high as 2.5 × 1010 years, a value some five times greater than estimates quoted half a decade ago.
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The Age of the Galaxy

1989
How old are the halo globular clusters, the disk globular clusters and the oldest stars of the galactic disk? In principle, these questions can be answered directly from observations and the theory of stellar evolution (isochrones), nuclear cosmochronology and white dwarf cooling. In practice, the various estimates do not yet agree well.
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Nucleochronology and the Age of the Galaxy

2003
Radioactive dating of elements consists in using the meteoritic abundances of the decay products of certain radioactive elements to derive information on their age distribution in the solar system. This information, in turn, is relevant to the duration of the star formation and nucleosynthesis history before the Sun formed and therefore to the age of ...
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The Ages of Elliptical Galaxies

1994
We describe evidence supporting the view that the evolution of elliptical galaxies and spiral bulges was more complex and heterogeneous than formerly supposed. They appear to have prolonged, episodic star formation histories, and their dominant stellar populations can range in age from ~ 1 to ~ 15 Gyr.
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