Results 1 to 10 of about 34,107 (312)

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
doaj   +1 more source

The ALPINE-CRISTAL-JWST Survey: Gas-phase abundance gradients of main-sequence star-forming galaxies and their kinematics at 4 < z < 6

Astronomy & Astrophysics
We present gas-phase radial metallicity profiles for 20 main-sequence galaxies at 4  4.
Lee L. L., Förster Schreiber N. M., Fujimoto S., Faisst A. L., Herrera-Camus R., Genzel R., Tacconi L. J., Lutz D., Renzini A., Sanders R., Wisnioski E., Wuyts S., Parlanti E., Jones G., Übler H., Liu D., Chen J., Davies R. I., Tozzi G., Burkert A., Price S. H., Aravena M., Boquien M., Béthermin M., da Cunha E., Davies R. L., De Looze I., Dessauges-Zavadsky M., Ferrara A., Fisher D. B., Gillman S., Ginolfi M., Ibar E., Koekemoer A. M., Molina J., Naab T., Relaño M., Riechers D. A., Sanders D. B., Spilker J. S., Vallini L., Zamorani G., Nanni A., Dam P., Diaz-Santos T., Gómez-Espinoza D., Hadi A., Ikeda R., Posses A., Romano M., Sternberg A., Villanueva V., Wang W.   +52 more
doaj   +1 more source

First Light And Reionization Epoch Simulations (FLARES) XXI: The UV Indices of Galaxies in the Early Universe

The Open Journal of Astrophysics
UV absorption line indices trace both chemical enrichment and star formation histories in high-redshift galaxies, yet their reliability as tracers of stellar metallicity (Z*) remains uncertain.
Connor Sant Fournier, Stephen M. Wilkins, Joseph Caruana, Kristian Zarb Adami, Conor M. Byrne, William J. Roper, Jack C. Turner, Aswin P. Vijayan   +7 more
doaj   +1 more source

Constraints on the Metallicity-dependent Explodability of Massive Stars from Galactic Chemical Evolution: Toward Alleviating the Red Supergiant Problem

The Astrophysical Journal
The explodability of massive stars, namely whether they undergo core-collapse supernovae (CCSNe) or form black holes (BHs), strongly influences galactic chemical evolution (GCE).
Sojun Ono, Keiichi Maeda, Akihiro Suzuki
doaj   +1 more source

Using multi-task learning to determine gas-phase metallicity of star-forming galaxies

Astronomy & Astrophysics
Aims. This study aimed to improve the estimation of the gas-phase metallicity of star-forming galaxies by using a multi-task learning approach that simultaneously performs gas-phase metallicity estimation and spectral classification of galaxies. Methods.
Wang Li-Li, Feng Jia-Bao, Yang Guang-Jun
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source

Genesis-metallicity: Universal Nonparametric Gas-phase Metallicity Estimation

The Astrophysical Journal Letters
We introduce genesis-metallicity , a gas-phase metallicity measurement P ython software employing the direct and strong-line methods depending on the available oxygen lines.
Danial Langeroodi, Jens Hjorth
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source