Results 41 to 50 of about 318,680 (321)

Probing Massive Star Nucleosynthesis with Data on Metal-Poor Stars and the Solar System [PDF]

EPJ Web of Conferences, 2022
Metal-poor stars were formed during the early epochs when only massive stars had time to evolve and contribute to the chemical enrichment. Low-mass metal-poor stars survive until the present and provide fossil records of the nucleosynthesis of early ...
Qian Yong-Zhong
doaj   +1 more source

The dynamics of Wolf numbers based on nonlinear dynamo with magnetic helicity: comparisons with observations [PDF]

, 2016
We investigate the dynamics of solar activity using a nonlinear one-dimensional dynamo model and a phenomenological equation for the evolution of Wolf numbers. This system of equations is solved numerically. We take into account the algebraic and dynamic
Kleeorin, N., Kleeorin, Ya., Porshnev, S., Rogachevskii, I., Safiullin, N., Sokoloff, D.   +5 more
core   +1 more source

Kuiper belts around nearby stars [PDF]

, 2010
Context. The existence of dusty debris disks around a large fraction of solar type main-sequence stars, inferred from excess far-IR and submillimetre emission compared to that expected from stellar photospheres, suggests that leftover planetesimal belts ...
R. Nilsson, R. Liseau, A. Brandeker, G. Olofsson, G. Pilbratt, C. Risacher, J. Rodmann, J. Augereau, P. Bergman, C. Eiroa, M. Fridlund, P. Th'ebault, G. P. D. O. Astronomy, S. University, Stockholm, Sweden., O. Observatory, C. U. Technology, Onsala, E. A. Division, Estec, Noordwijk, The Netherlands., Sron, Groningen, Esaestec Space Environment, Effects Section, U. J. Fourier-CNRS, L. D. D. Grenoble, Grenoble, France., Dpto. de F'isica Te'orica, F. Ciencias, U. A. D. Madrid, Madrid, Spain., O. Paris, S. Meudon, D. Physics, Astronomy, Open University, M. Keynes, UK., Science, Technology Facilities Council, R. Laboratory, Didcot   +46 more
semanticscholar   +1 more source

The formation of the solar system

, 2015
The solar system started to form about 4.56 Gyr ago and despite the long intervening time span, there still exist several clues about its formation. The three major sources for this information are meteorites, the present solar system structure and the ...
Davies, M. B., Gounelle, M., Johansen, A., Lacerda, P., Muenker, C., Pfalzner, S., Testi, L., Trieloff, M., Veras, D., Zwart, S. Portegies   +9 more
core   +3 more sources

Organic Matter in the Asteroid Ryugu: What We Know So Far

Life, 2023
The Hayabusa2 mission was tasked with returning samples from the C-complex asteroid Ryugu (1999 JU3), in order to shed light on the formation, evolution and composition of such asteroids.
Christian Potiszil, Masahiro Yamanaka, Chie Sakaguchi, Tsutomu Ota, Hiroshi Kitagawa, Tak Kunihiro, Ryoji Tanaka, Katsura Kobayashi, Eizo Nakamura   +8 more
doaj   +1 more source

Vesta and Ceres: crossing the history of the Solar System

, 2011
The evolution of the Solar System can be schematically divided into three different phases: the Solar Nebula, the Primordial Solar System and the Modern Solar System.
Coradini, Angioletta, Federico, Costanzo, Magni, Gianfranco, Turrini, Diego   +3 more
core   +1 more source

On the oxygen isotopic composition of the Solar System [PDF]

, 2009
The 18O/17O ratio of the Solar System is 5.2 while that of the interstellar medium (ISM) and young stellar objects is ~4. This difference cannot be explained by pollution of the Sun's natal molecular cloud by 18O-rich supernova ejecta because (1) the ...
Alexander N. Krot, Boothroyd, Boss, Eric Gaidos, Fuch, Gaidos, Gary R. Huss, Goswami, Gounelle, Heck, Henkel, Krot, Limongi, Lodders, McKeegan, Meikle, Meyer, Milam, Nittler, Prantzos, Thrane, Tsuji, Wielen, Williams, Wyckoff, Yong, Young, Yurimoto   +27 more
core   +1 more source

Research progress on internal characteristics of asteroids and comets: implications of Tianwen-2 radar observations

Earth and Planetary Physics
Asteroids and comets, which have long been of interest to astronomers, are important components of the solar system. They contain rich primitive information about the early solar system, which provide a unique pathway for studying the formation and ...
ShiBang Du, ChunYu Ding, Yan Su, JiaWei Li, Shun Dai, Ravi Sharma, YuXiao Zhi, JiangWan Xu, XiaoHang Qiu, ZhongHan Lei, ChangZhi Jiang, HaoYu Chen, ZiHang Liang   +12 more
doaj   +1 more source

EUV imaging and spectroscopy for improved space weather forecasting

Journal of Space Weather and Space Climate, 2020
Accurate predictions of harmful space weather effects are mandatory for the protection of astronauts and other assets in space, whether in Earth or lunar orbit, in transit between solar system objects, or on the surface of other planetary bodies. Because
Golub Leon, Cheimets Peter, DeLuca Edward E., Madsen Chad A., Reeves Katharine K., Samra Jenna, Savage Sabrina, Winebarger Amy, Bruccoleri Alexander R.   +8 more
doaj   +1 more source

Thermal processing of primordial pebbles in evolving protoplanetary disks [PDF]

Astronomy & Astrophysics
During protoplanetary disk formation, dust grains located in the outer disk retain their pristine icy composition, while solids in the inner stellar-heated disk undergo volatile loss.
María José Colmenares, M. Lambrechts, E. V. Kooten, Anders Johansen   +3 more
semanticscholar   +1 more source