Results 1 to 10 of about 142,268 (297)

The Effect of Age and Stellar Model Choice on Globular Cluster Color-to-metallicity Conversions

The Astronomical Journal
The photometric colors of globular clusters (GCs) act as effective proxies for metallicity, since all normally used optical/IR color indices exhibit a nonlinear but monotonic relation between their integrated color and their metallicity. One color index,
Kate Hartman, William E. Harris
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The Metallicity Dependence of PAH Emission in Galaxies. I. Insights from Deep Radial Spitzer Spectroscopy

The Astrophysical Journal
We use deep Spitzer mid-infrared spectroscopic maps of radial strips across three nearby galaxies with well-studied metallicity gradients (M101, NGC 628, and NGC 2403) to explore the physical origins of the observed deficit of polycyclic aromatic ...
Cory M. Whitcomb, J.-D. T. Smith, Karin Sandstrom, Carl A. Starkey, Grant P. Donnelly, Bruce T. Draine, Evan D. Skillman, Daniel A. Dale, Lee Armus, Brandon S. Hensley, Thomas S.-Y. Lai, Robert C. Kennicutt   +11 more
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Not Just Winds: Why Models Find That Binary Black Hole Formation Is Metallicity-dependent, while Binary Neutron Star Formation Is Not

The Astrophysical Journal
Both detailed and rapid population studies alike predict that binary black hole (BHBH) formation is orders of magnitude more efficient at low metallicity than high metallicity, while binary neutron star (NSNS) formation remains mostly flat with ...
L. A. C. van Son, S. K. Roy, I. Mandel, W. M. Farr, A. Lam, J. Merritt, F. S. Broekgaarden, A. A. C. Sander, J. J. Andrews   +8 more
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Colours in metal glasses, in metallic films and in metallic solutions.—II [PDF]

, 1905
John C. Garnett
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Understanding Stellar Mass–Metallicity and Size Relations in Simulated Ultrafaint Dwarf Galaxies

The Astrophysical Journal
Reproducing the physical characteristics of ultrafaint dwarf galaxies (UFDs) in cosmological simulations is challenging, particularly with respect to stellar metallicity and galaxy size.
Minsung Go, Myoungwon Jeon, Yumi Choi, Nitya Kallivayalil, Sangmo Tony Sohn, Gurtina Besla, Hannah Richstein, Sal Wanying Fu, Tae Bong Jeong, Jihye Shin   +9 more
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Potential-driven Metal Cycling: JADES Census of Gas-phase Metallicity for Galaxies at 1 < z < 7

The Astrophysical Journal Letters
The gravitational potential is established as a critical determinant of gas-phase metallicity (12+log(O/H)) in low-redshift galaxies, whereas its influence remains unconfirmed at high redshifts.
Cheng Jia, Enci Wang, Cheqiu Lyu, Chengyu Ma, Jie Song, Yangyao Chen, Kai Wang, Haoran Yu, Zeyu Chen, Jinyang Wang, Yifan Wang, Xu Kong   +11 more
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Filter Design for Estimation of Stellar Metallicity: Insights from Experiments with Gaia XP Spectra

The Astrophysical Journal Letters
We search for an optimal filter design for the estimation of stellar metallicity, based on synthetic photometry from Gaia XP spectra convolved with a series of filter-transmission curves defined by different central wavelengths and bandwidths.
Kai Xiao, Bowen Huang, Yang Huang, Haibo Yuan, Timothy C. Beers, Jifeng Liu, Maosheng Xiang, Xue Lu, Shuai Xu, Lin Yang, Chuanjie Zheng, Zhirui Li, Bowen Zhang, Ruifeng Shi   +13 more
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MAGNETIC EVIDENCE REGARDING THE STATE OF METALLIC IONS IN PHOSPHATE GLASSES. [PDF]

, 1940
S. S. BHATNAGAR, B. D. KHOSLA, RAM CHAND
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Unveiling the Cosmic Chemistry: Revisiting the Mass–Metallicity Relation with JWST/NIRSpec at 4 < z < 10

The Astrophysical Journal
We present star formation rates (SFRs), the mass–metallicity relation (MZR), and the SFR-dependent MZR across redshifts 4–10 using 81 star-forming galaxies observed by the JWST NIRSpec employing both low-resolution PRISM and medium-resolution gratings ...
Arnab Sarkar, Priyanka Chakraborty, Mark Vogelsberger, Michael McDonald, Paul Torrey, Alex M. Garcia, Gourav Khullar, Gary J. Ferland, William Forman, Scott Wolk, Benjamin Schneider, Mark Bautz, Eric Miller, Catherine Grant, John ZuHone   +14 more
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Characterization of exoplanet hosts

EPJ Web of Conferences, 2013
Spectroscopic analysis of exoplanet hosts and the stellar sample from which they are drawn provides abundances and other properties that quantitively constrain models of planet formation.
Valenti Jeff A.
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