Results 91 to 100 of about 59,640 (247)

Dissipative N - body code for galaxy evolution

, 2000
The evolving galaxy is considered as a system of baryonic fragments embedded into the static dark nonbaryonic (DH) and baryonic (BH) halo and subjected to gravitational and viscous interactions.
Douphole B., Kuijken K., P. Berczik, Pagel B. E. J., Raiteri C. M., S. G. Kravchuk, Samland M., Steinmetz M.   +7 more
core   +1 more source

Initial study of regolith exposure ages and burial conditions on Ryugu: Cosmogenic nuclides score in two touchdowns

Meteoritics &Planetary Science, EarlyView.
Abstract Surface processes on the asteroid Ryugu have been investigated using cosmic‐ray‐produced radionuclides, 10Be, 26Al, and 36Cl, and stable noble gases, on eight samples returned by the Hayabusa2 spacecraft. The 10Be and 26Al along with 21Ne measurements indicate that the two Chamber A samples A0105 collected during the first touchdown (TD) were ...
Kunihiko Nishiizumi, Keisuke Nagao, Marc W. Caffee, Ryuji Okazaki, Jozef Masarik, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Kasumi Yogata, Toru Yada, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda, Masanao Abe, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Hirotaka Sawada, Satoshi Tanaka, Tomohiro Usui, Koji Wada, Hajime Yano, Makoto Yoshikawa, Hayabusa2 Initial Analysis Volatile Team   +30 more
wiley   +1 more source

A JWST/MIRI View of the Interstellar Medium in M83. I. Resolved Molecular Hydrogen Properties, Star Formation, and Feedback

The Astrophysical Journal
We present a spatially resolved (∼3 pc pixel ^−1 ) analysis of the distribution, kinematics, and excitation of warm H _2 gas in the nuclear starburst region of M83.
Logan H. Jones, Svea Hernandez, Linda J. Smith, Aditya Togi, Tanio Diaz-Santos, Alessandra Aloisi, William Blair, Alec S. Hirschauer, Leslie K. Hunt, Bethan L. James, Nimisha Kumari, Vianney Lebouteiller, Matilde Mingozzi, Lise Ramambason   +13 more
doaj   +1 more source

The chemical evolution of galaxies

Metals -- heavy elements synthesized during various phases of stellar evolution or during supernova explosions -- play a fundamental role in shaping galaxy evolution. In fact, their relative abundances, spatial distribution, and scaling with galactic properties reflect the constant interplay between star-formation, nucleosynthesis, and gas flows that ...
openaire   +2 more sources

Dust-regulated galaxy formation and evolution:A new chemodynamical model with live dust particles

, 2015
Interstellar dust plays decisive roles in the conversion of neutral to molecular hydrogen (H_2), the thermodynamical evolution of interstellar medium (ISM), and the modification of spectral energy distributions (SEDs) of galaxies.
Bekki, Kenji
core   +1 more source

Model Calculations for Cosmogenic Nuclides in Meteorites and the Lunar Surface. 1. Long‐lived Radionuclides

Meteoritics &Planetary Science, EarlyView.
Abstract Production rates for the cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, 41Ca, 53Mn, and 60Fe in a large variety of meteorites, that is, ordinary chondrites (H, L, LL), carbonaceous chondrites, HED meteorites, ureilites, Martian meteorites, and iron meteorites and in the uppermost ~2 m of the lunar surface are modeled.
Ingo Leya
wiley   +1 more source

Rearing duration influences survival rate in the Post‐Larval Capture, Culture and Release of a coral reef fish

Restoration Ecology, EarlyView.
Abstract Introduction Juvenile coral reef fish face an initial predation‐induced mortality bottleneck with mortality exceeding 60% within 48 hours of settlement. This intense predation, exacerbated by anthropogenic stressors, limits recruitment and contributes to global declines of reef fish populations. Post‐Larval Capture, Culture, and Release (PCCR),
Alan Gojanovic, Rohan M. Brooker, Jennifer L. Kelley, Nathan W. Price, Tess L. Jenkins, Martial Depczynski, Thomas H. Holmes, Jan M. Hemmi   +7 more
wiley   +1 more source

Unveiling the Galactic Baryon Cycle Process by an Empirical Model

The Astrophysical Journal
We propose an empirical model to describe and constrain the baryon cycle process during galaxy evolution. This model utilizes the evolution of star formation rate, derived from the stellar mass–halo mass relations across different redshifts, and the cold
Yaoxin Chen, Xi Kang, Hong Guo, Hou-Zun Chen, Jiafeng Lu   +4 more
doaj   +1 more source

Chemical Evolution Of Galaxies And Intracluster Medium [PDF]

, 2004
In this series of lectures I discuss the basic principles and the modelling of the chemical evolution of galaxies. In particular, I present models for the chemical evolution of the Milky Way galaxy and compare them with the available observational data.
openaire   +2 more sources

The Chemical Evolution of the Milky Way

, 1999
The field of chemical evolution modeling of the Galaxy is experiencing in the last years a phase of high activity and important achievements. There are, however, several open questions which still need to be answered. In this review I summarize what have
A Pasquali, A Renzini, AA Penzias, AI Boothroyd, B Barbuy, B Edvardsson, C Chiappini, CG Lacey, E Anders, F Matteucci, Forestini, JM Scalo, LB van den Hoek, M Tosi, M Tosi, M Tosi, M Tosi, N Prantzos, P Kroupa, PA Shaver, R Wielen, Rocha, S Boissier, S Smartt, SE Woosley, T.C. Beers, WJ Maciel, WJ Maciel   +27 more
core   +1 more source