Results 41 to 50 of about 58,855 (236)

Chemical evolution of the Small Magellanic Cloud based on planetary nebulae [PDF]

, 2007
We investigate the chemical evolution of the Small Magellanic Cloud (SMC) based on abundance data of planetary nebulae (PNe). The main goal is to investigate the time evolution of the oxygen abundance in this galaxy by deriving an age-metallicity ...
Allende-Prieto, Aller, Anders, Asplund, Bertelli, Boroson, Cardelli, Cazetta, Chiappini, Costa, Da Costa, de Freitas Pacheco, Dolphin, Dopita, Dufour, Escudero, Feast, Girardi, Harris, Henry, Hilditch, Hill, Kaler, Keller, Kingdon, Kingsburgh, Lanfranchi, Leisy, Leisy, Maciel, Meatheringham, Meatheringham, Meatheringham, Meyssonnier, Monk, Olszewski, Osmer, Pagel, Peimbert, Piatti, Piatti, Péquignot, R. D. D. Costa, Rola, Russell, Stanghellini, Stasinska, T. P. Idiart, van den Bergh, Vassiliadis, Vassiliadis, W. J. Maciel, Webster, Wood   +53 more
core   +1 more source

Revisiting the Fundamental Metallicity Relation with Observation and Simulation

The Astrophysical Journal Letters
The gas-phase metallicity of galaxies is regulated by multiple astrophysical processes, which makes it a crucial diagnostic of galaxy formation and evolution.
Chengyu Ma, Kai Wang, Enci Wang, Yingjie Peng, Haochen Jiang, Haoran Yu, Cheng Jia, Zeyu Chen, Haixin Li, Xu Kong   +9 more
doaj   +1 more source

Galaxy Formation and Chemical Evolution

International Journal of Astronomy and Astrophysics, 2014
14 pages, 5 ...
openaire   +4 more sources

EMPRESS. XIII. Chemical Enrichment of Young Galaxies Near and Far at z ∼ 0 and 4–10: Fe/O, Ar/O, S/O, and N/O Measurements with a Comparison of Chemical Evolution Models

The Astrophysical Journal
We present gas-phase elemental abundance ratios of thirteen local extremely metal-poor galaxies (EMPGs), including our new Keck/LRIS spectroscopy determinations together with 33 James Webb Space Telescope z ∼ 4–10 star-forming galaxies in the literature,
Kuria Watanabe, Masami Ouchi, Kimihiko Nakajima, Yuki Isobe, Nozomu Tominaga, Akihiro Suzuki, Miho N. Ishigaki, Ken’ichi Nomoto, Koh Takahashi, Yuichi Harikane, Shun Hatano, Haruka Kusakabe, Takashi J. Moriya, Moka Nishigaki, Yoshiaki Ono, Masato Onodera, Yuma Sugahara   +16 more
doaj   +1 more source

Overmerging and M/L ratios in phenomenological galaxy formation models

, 1999
We show that the discrepancy between the Tully-Fisher relation and the luminosity function predicted by most phenomenological galaxy formation models is mainly due to overmerging of galaxy haloes.
Jimenez, Raul, Peacock, John A., van Kampen, Eelco   +2 more
core   +1 more source

The Chemical Evolution of the Ursa Minor Dwarf Spheroidal Galaxy [PDF]

, 2010
We present an abundance analysis based on high resolution spectra of 10 stars selected to span the full range in metallicity in the Ursa Minor dwarf spheroidal galaxy.
Abazajian, Aoki, Asplund, Baumüller, Baumüller, Bellazzini, Carpenter, Cohen, Cohen, Cohen, Cohen, Cohen, Cohen, Cutri, Dotter, Frebel, Fulbright, Fulbright, Fulbright, Gallagher, Geisler, Grebel, Helmi, Houdashelt, Ishigaki, Ivans, Johnson, Judith G. Cohen, Kirby, Kirby, Klypin, Kobayashi, Koch, Koch, Kurucz, Lai, Letarte, Limongi, Matteucci, Melendez, Mighell, Nissen, Nissen, Nissen, Norris, Ohkubo, Orban, Palma, Peñarrubia, Piatek, Prantzos, Prochaska, Qian, Roederer, Sadakane, Salvadori, Schlegel, Shetrone, Shetrone, Shetrone, Shortridge, Simmerer, Simon, Skrutskie, Smith, Sneden, Stephens, Tolstoy, Travaglio, Walker, Wenjin Huang, Winnick, York, Young   +73 more
core   +3 more sources

Modeling the Ages and Chemical Abundances of Elliptical Galaxies

The Astrophysical Journal
Spectroscopic studies of elliptical galaxies show that their stellar population ages, mean metallicity, and α enhancement traced by [Mg/Fe] all increase with galaxy stellar mass or velocity dispersion.
Nicole Marcelina Gountanis, David H. Weinberg, Aliza G. Beverage, Nathan R. Sandford, Charlie Conroy, Mariska Kriek   +5 more
doaj   +1 more source

Chemical Evolution of Galaxies

, 1987
We review some of the present ideas on chemical evolution of irregular galaxies and disks of spiral galaxies. Based on the O abundances in stars and H II regions we present a discussion of the yield; we also discuss the effects of large scale mass flows and of cold dark matter to explain variations in the observed yield. The C, N, O observed abundances
Manuel Peimbert, Silvia Torres-Peimbert
openaire   +2 more sources

New chemical evolution analytical solutions including environment effects

, 2015
In the last years, more and more interest has been devoted to analytical solutions, including inflow and outflow, to study the metallicity enrichment in galaxies.
Spitoni, E.
core   +1 more source

The Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey

The Astrophysical Journal Letters
We present the Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey, a deep slitless spectroscopic and imaging Cycle 1 JWST treasury survey designed to constrain feedback mechanisms in low-mass galaxies across cosmic time. NGDEEP targets
Micaela B. Bagley, Nor Pirzkal, Steven L. Finkelstein, Casey Papovich, Danielle A. Berg, Jennifer M. Lotz, Gene C. K. Leung, Henry C. Ferguson, Anton M. Koekemoer, Mark Dickinson, Jeyhan S. Kartaltepe, Dale D. Kocevski, Rachel S. Somerville, L. Y. Aaron Yung, Bren E. Backhaus, Caitlin M. Casey, Marco Castellano, Óscar A. Chávez Ortiz, Katherine Chworowsky, Isabella G. Cox, Romeel Davé, Kelcey Davis, Vicente Estrada-Carpenter, Adriano Fontana, Seiji Fujimoto, Jonathan P. Gardner, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Nimish P. Hathi, Taylor A. Hutchison, Anne E. Jaskot, Intae Jung, Lisa J. Kewley, Allison Kirkpatrick, Rebecca L. Larson, Jasleen Matharu, Priyamvada Natarajan, Laura Pentericci, Pablo G. Pérez-González, Swara Ravindranath, Barry Rothberg, Russell Ryan, Lu Shen, Raymond C. Simons, Gregory F. Snyder, Jonathan R. Trump, Stephen M. Wilkins   +47 more
doaj   +1 more source