Results 1 to 10 of about 602,274 (295)

Chemical Enrichment at High Redshifts [PDF]

The Astrophysical Journal, 1998
We have tried to understand the recent observations related to metallicity in Ly $\alpha$ forest clouds in the framework of the two component model suggested by Chiba & Nath (1997).
Bergeron J., Cristiani S., Khare P., Khare P., Kulkarni V. P., Mo H. J., Petitjean P., Petitjean P., Pushpa Khare, Snigdha Das, Srianand R., Wampler E. J.   +11 more
core   +4 more sources

Enrichment Law of Hazardous Chemicals Enrichment under Dangerous Chemical Environment of Coal Mining

Chemical Engineering Transactions, 2018
During the process of coal mining, the CH4 produced by the coal will be released in the workspace. With the movement of the working face, the overlying strata will be moved or destroyed, resulting in the continuous development of mining cracks and thus ...
Xiaohua Jin, Beifang Gu
doaj   +2 more sources

The chemical enrichment of the ICM from hydrodynamical simulations [PDF]

Space Science Reviews, 2008
The study of the metal enrichment of the intra-cluster and inter-galactic media (ICM and IGM) represents a direct means to reconstruct the past history of star formation, the role of feedback processes and the gas-dynamical processes which determine the ...
A. Chieffi, A. Diaferio, A. Diaferio, A. Diaferio, A. Finoguenov, A. Gal-Yam, A. Gal-Yam, A. Maeder, A. Pipino, A. Renzini, A. Renzini, A. Renzini, A. Saro, A. Vikhlinin, A.D. Romeo, A.D. Romeo, B.J. Maughan, C. Chiappini, C. Kobayashi, C. Lia, C. Scannapieco, C.F. McKee, C.M. Raiteri, D. Fabjan, D. Kawata, D. Kawata, D. Romano, D. Sijacki, D.J. Croton, E. Roediger, E. Scannapieco, E.E. Salpeter, F. Calura, F. Mannucci, F. Matteucci, F. Matteucci, F. Matteucci, F.-K. Thielemann, G. Bertelli, G. Chabrier, G. Lucia De, G.M. Voit, I. Balestra, I.A. Bonnell, J. Plaa de, J. Plaa de, J.R. Peterson, J.S. Kaastra, K. Dolag, K. Dolag, K. Iwamoto, K. Nomoto, K. Nomoto, L. Greggio, L. Greggio, L. Portinari, L. Portinari, L. Tornatore, L. Tornatore, L.B. den Hoek van, L.R. Yungelson, M. Loewenstein, M. Nagashima, M. Sullivan, M.B. Mosconi, N. Arimoto, N. Grevesse, N. Katz, N. Werner, N. Werner, P. Kroupa, P. Kroupa, P. Marigo, P. Padoan, P. Padovani, P. Rebusco, P. Rosati, R. Valdarnini, R.B. Larson, R.F. Mushotzky, R.F. Mushotzky, R.G. Bower, R.G. Bower, R.S. Sutherland, S. Borgani, S. Borgani, S. Ettori, S. Grandi De, S. Schindler, S. Schindler, S.A. Cora, S.E. Woosley, V. Springel, V. Springel, W. Domainko, W. Kapferer, W. Kapferer, W.H. Baumgartner, Y. Fukazawa   +98 more
core   +5 more sources

Chemical Enrichment RGS cluster sample (CHEERS): Constraints on turbulence [PDF]

Astronomy & Astrophysics, 2015
Feedback from AGN, galactic mergers, and sloshing are thought to give rise to turbulence, which may prevent cooling in clusters. We aim to measure the turbulence in clusters of galaxies and compare the measurements to some of their structural and ...
Ahoranta, Jussi, de Plaa, Jelle, Fabian, Andrew C., Finoguenov, Alexis, Kaastra, Jelle S., Pinto, Ciro, Sanders, Jeremy S., Werner, Norbert, Zhang, Yu-Ying   +8 more
core   +3 more sources

The First Galaxies: Chemical Enrichment, Mixing, and Star Formation [PDF]

The Astrophysical Journal, 2010
Using three-dimensional cosmological simulations, we study the assembly process of one of the first galaxies, with a total mass of 10^8 M_sun, collapsing at z = 10.
Abrahamsson, Ahn, Alvarez, Alvarez, Barkana, Boley, Bromm, Bromm, Cen, Cherchneff, Clark, Clark, Dijkstra, Frebel, Frebel, Glover, Greif, Haiman, Haiman, Heger, Helmi, Jappsen, Jappsen, Jappsen, Johnson, Karlsson, Kudritzki, Mackey, Madau, McKee, Monaghan, Navarro, Nozawa, Omukai, O’Shea, O’Shea, O’Shea, Puzia, Ralf S. Klessen, Santoro, Schaye, Shen, Simon C. O. Glover, Spergel, Thomas H. Greif, Tormen, Tumlinson, Volker Bromm, Whalen, Whalen, Whalen, Whalen, Wise, Wise, Yoshida, Yoshida   +55 more
core   +4 more sources

Chemical enrichment in LINERs from MaNGA

Astronomy & Astrophysics
Context. Chemical abundance radial gradients provide key information on how the processes that affect chemical enrichment of the gas-phase interstellar medium (ISM) act at different galaxy scales. In the past decades, though there has been an increase in
Pérez-Díaz Borja, Vílchez José M., Pérez-Montero Enrique, Zinchenko Igor A., Tapia-Contreras Brian, Tissera Patricia B.   +5 more
doaj   +2 more sources

Probing Chemical Enrichment in Extremely Metal-poor Galaxies

The Astrophysical Journal
The chemical composition of galaxies offers vital insights into their formation and evolution. In particular, the relationship between helium abundance (He/H) and metallicity serves as a key diagnostic for estimating the primordial helium yield from Big ...
Keita Fukushima, Kentaro Nagamine, Akinori Matsumoto, Yuki Isobe, Masami Ouchi, Takayuki R. Saitoh, Yutaka Hirai   +6 more
doaj   +3 more sources

Planetary Nebulae as Sources of Chemical Enrichment of the Galaxy

Frontiers in Astronomy and Space Sciences, 2022
During the late asymptotic giant branch (AGB) phase of stellar evolution, the element carbon is created through the triple-α nuclear reaction. This is followed by the synthesis of other heavy elements via neutron capture in the core and the dredge-up of ...
Sun Kwok, Sun Kwok
doaj   +1 more source

Simulations of Cosmic Chemical Enrichment [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
16 pages, 20 figures.
Kobayashi, C., Springel, V., White, S.
openaire   +3 more sources

Study of the Influence of Dynamic and Static Capillary Forces on Production in Low-Permeability Reservoirs

Energies, 2023
Low-permeability reservoirs have strong heterogeneity, and the production prediction based on traditional seepage model is not accurate enough. The dynamic capillary-force seepage model can characterize the dynamic heterogeneity of seepage and more ...
Yuanzhang Zhang, Youqi Wang, Jianwen Gao, Yuehua Cui, Shuoliang Wang   +4 more
doaj   +1 more source