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The circumgalactic medium (CGM) connects the gas between the interstellar medium (ISM) and the intergalactic medium, which plays an important role in galaxy evolution. We use the stellar mass-metallicity relationship to investigate whether…

Astrophysics of Galaxies · Physics 2021-05-12 Sai Zhai , Yong Shi , Jianhang Chen , Longji Bing , Yanmei Chen , Xiaoling Yu , Songlin Li

Abridged. We aim to better characterise the evolution and fates, and determine updated nucleosynthetic yields of intermediate-mass stars between primordial and EMP metallicity (Z=1e-10, 1e-8, 1e-7, 1e-6 and 1e-5). We also probed…

Solar and Stellar Astrophysics · Physics 2022-12-14 P. Gil-Pons , C. L. Doherty , S. W. Campbell , J. Gutiérrez

Using a compilation of 25 studies from the literature, we investigate the evolution of the star-forming galaxy (SFG) Main Sequence (MS) in stellar mass and star formation rate (SFR) out to $z \sim 6$. After converting all observations to a…

Astrophysics of Galaxies · Physics 2015-06-19 Joshua S. Speagle , Charles L. Steinhardt , Peter L. Capak , John D. Silverman

We investigate the evolution of nuclear gas-phase oxygen abundance and star formation rate (SFR) of local far-infrared selected star-forming galaxies along the merger sequence, as traced by their optical morphologies. The sample was drawn…

Astrophysics of Galaxies · Physics 2016-06-21 Rui Guo , Cai-Na Hao , Xiao-Yang Xia , Peng Wei , Xin Guo

We study the relationship between stellar mass, star formation rate (SFR),ionization state, and gas-phase metallicity for a sample of 41 normal star-forming galaxies at $3 \lesssim z \lesssim 3.7$. The gas-phase oxygen abundance, ionization…

Astrophysics of Galaxies · Physics 2016-05-25 M. Onodera , C. M. Carollo , S. Lilly , A. Renzini , N. Arimoto , P. Capak , E. Daddi , N. Scoville , S. Tacchella , S. Tatehora , G. Zamorani

We have computed detailed evolution and nucleosynthesis models for super and massive AGB stars over the mass range 6.5-9.0 Msun in divisions of 0.5 Msun with metallicities Z=0.02, 0.008 and 0.004. These calculations, in which we find third…

Solar and Stellar Astrophysics · Physics 2015-06-17 Carolyn L. Doherty , Pilar Gil-Pons , Herbert H. B Lau , John C. Lattanzio , Lionel Siess

Intermediate mass stars occupy the mass range between 0.8-8 solar masses. In this review, evolutionary models of these stars from numerous sources are compared in terms of their input physics and predicted yields. In particular, the results…

Astrophysics · Physics 2007-05-23 R. B. C. Henry

(abridged version) Identifying the processes that determine the initial mass function of stars (IMF) is a fundamental problem in star formation theory. One of the major uncertainties is the exact chemical state of the star forming gas and…

Astrophysics · Physics 2015-11-11 R. S. Klessen , A. -K. Jappsen , R. B. Larson , Y. Li , M. -M. Mac Low

We present a series of adaptive mesh refinement (AMR) hydrodynamic simulations of flat rotation curve galactic gas disks with a detailed treatment of the interstellar medium (ISM) physics of the atomic to molecular phase transition under…

Astrophysics of Galaxies · Physics 2018-01-24 Qi Li , Jonathan C. Tan , Duncan Christie , Thomas G. Bisbas , Benjamin Wu

The interstellar medium (ISM) is the material that fills the space between the stars in all galaxies; it is a multi-phase medium in pressure equilibrium, with densities and temperatures covering over 6 orders of magnitude. Although…

Astrophysics of Galaxies · Physics 2025-04-03 Amelie Saintonge

Understanding the evolution of self-gravitating, isothermal, magnetized gas is crucial for star formation, as these physical processes have been postulated to set the initial mass function (IMF). We present a suite of isothermal…

We present a compiled catalogue of effective temperatures, surface gravities, iron and magnesium abundances, distances, velocity components, and orbital elements for stars in the solar neighborhood. The atmospheric parameters and iron…

Astrophysics · Physics 2009-11-10 T. V. Borkova , V. A. Marsakov

Recently discovered massive $\alpha$-enriched (MAE) stars have surface chemistry consistent with members of the older thick disk Milky Way population but high masses ($\sim$ 1.5 - 3 M$_{\odot}$) that suggest these stars are young. The…

Solar and Stellar Astrophysics · Physics 2025-11-18 Zachary G. Maas , Keith Hawkins , Jeffrey M. Gerber , Zoe Hackshaw , Catherine Manea

We present a 3d code for the dynamical evolution of a multi-phase interstellar medium (ISM) coupled to stars via star formation (SF) and feedback processes. The multi-phase ISM consists of clouds (sticky particles) and diffuse gas (SPH):…

Astrophysics · Physics 2009-11-07 S. Harfst , Ch. Theis , G. Hensler

Most structural and evolutionary properties of galaxies strongly rely on the stellar initial mass function (IMF), namely the distribution of the stellar mass formed in each episode of star formation. As the IMF shapes the stellar population…

Astrophysics of Galaxies · Physics 2023-01-31 Jiadong Li , Chao Liu , Zhi-Yu Zhang , Hao Tian , Xiaoting Fu , Jiao Li , Zhi-Qiang Yan

We present a dense grid of evolutionary tracks and isochrones of rotating massive main-sequence stars. We provide three grids with different initial compositions tailored to compare with early OB stars in the Small and Large Magellanic…

We review the role that magnetic field may have on the formation and evolution of molecular clouds. After a brief presentation and main assumptions leading to ideal MHD equations, their most important correction, namely the ion-neutral…

Astrophysics of Galaxies · Physics 2019-02-05 Patrick Hennebelle , Shu-ichiro Inutsuka

The abundance of nitrogen in the interstellar medium is a powerful probe of star for- mation processes over cosmological timescales. Since nitrogen can be produced both in massive and intermediate-mass stars with metallicity-dependent…

Astrophysics of Galaxies · Physics 2018-03-21 Elisabeth Vangioni , Irina Dvorkin , Keith A. Olive , Yohan Dubois , Paolo Molaro , Patrick Petitjean , Joe Silk , Taysun Kimm

We compute and analyze the evolution of primordial stars of masses at the ZAMS between 5 M_sun and 10 M_sun, with and without overshooting. Our main goals are to determine the nature of the remnants of massive intermediate-mass primordial…

Astrophysics · Physics 2015-06-24 Pilar Gil-Pons , Jordi Gutierrez , Enrique Garcia-Berro

We use vertically-resolved numerical hydrodynamic simulations to study star formation and the interstellar medium (ISM) in galactic disks. We focus on outer disk regions where diffuse HI dominates, with gas surface densities Sigma_SFR=3-20…

Astrophysics of Galaxies · Physics 2015-05-30 Chang-Goo Kim , Woong-Tae Kim , Eve C. Ostriker
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