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We study the relations between gas-phase metallicity ($Z$), local stellar mass surface density ($\Sigma_*$), and the local star formation surface density ($\Sigma_{\rm SFR}$) in a sample of 1120 star-forming galaxies from the MaNGA survey.…

Astrophysics of Galaxies · Physics 2020-11-13 Berzaf B. Teklu , Yulong Gao , Xu Kong , Zesen Lin , Zhixiong Liang

We present the stellar mass-metallicity relation for 34 0.4<z<1 galaxies selected from CFRS and Marano fields, and compare it to those derived from three local samples of galaxies (NFGS, KISS and SDSS). Our metal abundance estimates account…

Astrophysics · Physics 2016-08-30 Y. C. Liang , F. Hammer , H. Flores

We study the scaling relations between gas-phase metallicity, stellar mass surface density ($\Sigma _*$), star formation rate surface density ($\Sigma _{SFR}$), and molecular gas surface density ($\Sigma_{H_2}$) in local star-forming…

Recent results comparing interacting galaxies to the mass-metallicity relation show that their nuclear oxygen abundances are unexpectedly low. We present analysis of N-body/SPH numerical simulations of equal-mass mergers that confirm the…

Astrophysics of Galaxies · Physics 2015-05-14 David S. N. Rupke , Lisa J. Kewley , Joshua E. Barnes

The morphology of ionized gas velocity maps provides a direct probe of the internal gas kinematics of galaxies. Using integral field spectroscopy from SDSS-IV MaNGA, we analyze a sample of 528 low-inclination, regular disk galaxies to…

Astrophysics of Galaxies · Physics 2025-10-28 Shuai Feng , Shiyin Shen , Yanmei Chen , Y. Sophia Dai , Jun Yin , Wenyuan Cui , Mengting Ju , Linlin Li

It has been proposed that the mass-metallicity relation of galaxies exhibits a secondary dependence on star formation rate (SFR), and that the resulting M-Z-SFR relation may be redshift-invariant, i.e., "fundamental." However, conflicting…

Astrophysics of Galaxies · Physics 2014-12-23 Samir Salim , Janice C. Lee , Chun Ly , Jarle Brinchmann , Romeel Davé , Mark Dickinson , John J. Salzer , Stéphane Charlot

We used a one-zone chemical evolution model to address the question of how many masses and metallicities are required in grids of massive stellar models in order to ensure reliable galactic chemical evolution predictions. We used a set of…

The relation between metallicity and galaxy mass (the so-called mass-metallicity relation) is the strongest and most prominent among scaling relations between chemical enrichment and galactic properties. However, it is unclear whether this…

Astrophysics of Galaxies · Physics 2025-12-17 Maria Koller , Roberto Maiolino , William M. Baker

A number of previous studies have searched for a correlation between radial metallicity gradients and early-type galaxy mass -- no convincing trends have been found. Here we re-examine this issue with several key enhancements: using total…

Astrophysics · Physics 2009-11-11 Duncan A. Forbes , Patricia Sanchez-Blazquez , Robert Proctor

Using the near-IR spectroscopy of the MOSFIRE Deep Evolution Field (MOSDEF) survey, we investigate the role of local environment in the gas-phase metallicity of galaxies. The local environment measurements are derived from accurate and…

We review the theory of the Lamb shift for muonium, provide an updated numerical value and present the prospects of the Mu-MASS collaboration at PSI to improve upon their recent measurement. Due to its smaller nuclear mass, the…

Atomic Physics · Physics 2022-07-20 Gianluca Janka , Ben Ohayon , Paolo Crivelli

We find some errors in previous calculation of leading log QCD corrections to $b \to s\gamma $ decay, which include corrections from $m_{top}$ to $M_W$ in addition to corrections from $M_{W}$ to $m_b$. The inclusive decay rate is found to…

High Energy Physics - Phenomenology · Physics 2016-08-14 Cai-Dian Lü , Jing-Liang Hu , Chong-Shou Gao

We consider scaling of the mean square dipole moments in a plasma with logarithmic interactions in a two- and three-dimensional system. In both cases, we establish the existence of a low-temperature regime where the mean square dipole…

Strongly Correlated Electrons · Physics 2007-05-23 S. Kragset , A. Sudbo , F. S. Nogueira

We use the stellar fossil record to constrain the stellar metallicity evolution and star-formation histories of the post-starburst (PSB) regions within 45 local post-starburst galaxies from the MaNGA survey. The direct measurement of the…

The metallicity and gas density dependence of interstellar depletions, the dust-to-gas (D/G), and dust-to-metal (D/M) ratios have important implications for how accurately we can trace the chemical enrichment of the universe; either by…

We used the data of 701 stars covering the colour index interval 0.32<B-V<=1.16, with metallicities -1.76<=[Fe/H]<=+0.40 dex, which were taken from PASTEL catalogue and estimated metallicity dependent guillotine factors which provide a more…

Astrophysics of Galaxies · Physics 2015-05-27 S. Karaali , S. Bilir , S. Ak , E. Yaz , B. Coskunoglu

We present an updated version of the mass--metallicity relation (MZR) using integral field spectroscopy data obtained from 734 galaxies observed by the CALIFA survey. These unparalleled spatially resolved spectroscopic data allow us to…

By means of chemical evolution models for ellipticals, spirals and irregular galaxies, we aim at investigating the physical meaning and the redshift evolution of the mass-metallicity relation as well as how this relation is connected with…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 F. Calura , A. Pipino , C. Chiappini , F. Matteucci , R. Maiolino , -

Relative order \alpha(Z\alpha)^3 shift of the energy levels induced by the vacuum polarization is reexamined for a bound system of two particles with masses m and M. Recent results for hydrogen and for positronium are shown to contain an…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Yelkhovsky

Calculations employing the local density approximation combined with static and dynamical mean-field theories (LDA+U and LDA+DMFT) indicate that the metal-insulator transition observed at 32 GPa in paramagnetic LaMnO3 at room temperature is…

Strongly Correlated Electrons · Physics 2007-05-23 A. Yamasaki , M. Feldbacher , Y. -F. Yang , O. K. Andersen , K. Held