Results 111 to 120 of about 262,930 (273)

Gas metallicity diagnostics in star-forming galaxies

, 2006
Generally the gas metallicity in distant galaxies can only be inferred by using a few prominent emission lines. Various theoretical models have been used to predict the relationship between emission line fluxes and metallicity, suggesting that some line ...
A. Marconi, Abazajian, Abazajian, Adelman-McCarthy, Allende Prieto, Alloin, Alvensleben, Bresolin, Brinchmann, Bruzual, Cardelli, Castellanos, Charlot, Denicoló, Edmunds, Ferland, Ferland, Fioc, Guseva, Guseva, Guseva, Guseva, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Kauffmann, Kauffmann, Kennicutt, Kennicutt, Kennicutt, Kewley, Kewley, Kobulnicky, Kobulnicky, Lamareille, Lee, Lee, Lee, Leitherer, Liang, Maier, Maier, McCall, McGaugh, Melbourne, Miller, Nagao, Nagao, Pagel, Pagel, Papaderos, Peimbert, Pettini, Pettini, Pilyugin, Posselt, R. Maiolino, Rola, Shi, Stasinska, Strauss, Sutherland, Swinbank, T. Nagao, Teplitz, Teplitz, Thuan, Tremonti, Vílchez, Zaritsky   +73 more
core   +1 more source

Synthetic nebular emission from massive galaxies - I: origin of the cosmic evolution of optical emission-line ratios [PDF]

, 2017
Galaxies occupy different regions of the [OIII]$\lambda5007$/H$\beta$-versus-[NII]$\lambda6584$/H$\alpha$ emission-line ratio diagram in the distant and local Universe.
M. Hirschmann, S. Charlot, A. Feltre, T. Naab, E. Choi, J. Ostriker, R. Somerville   +6 more
semanticscholar   +1 more source

Micro‐Scale Arrays Fabricated on Parafilm and Polymethyl Methacrylate Towards Differential Colorimetric Analysis of Amines via Shape Transformation of Ag Nanoprisms

Analytical Science Advances, Volume 6, Issue 2, December 2025.
ABSTRACT A novel micro‐array was developed to a colorimetric detection of some amines, including histamine (HT), cadaverine (CAD), 1,4‐diaminobutane (putrescine), 2‐phenylethylamine (2‐PEA), spermidine (SD) and ethylenediamine (EA) using silver nanoparticle (silver nanoprisms [AgNPrs]) as optical nanoprobe.
Farnaz Bahavarnia, Mohammad Hasanzadeh, Nasrin Shadjou, Rokhsareh Ebrahimi   +3 more
wiley   +1 more source

H i Properties of Field Galaxies at z ≈ 0.2–0.6: Insights into Declining Cosmic Star Formation

The Astrophysical Journal Letters
We report statistically significant detection of H i 21 cm emission from intermediate-redshift ( z  ≈ 0.2–0.6) galaxies. By leveraging multisightline galaxy survey data from the Cosmic Ultraviolet Baryon Survey and deep radio observations from the ...
David DePalma, Neeraj Gupta, Hsiao-Wen Chen, Robert A. Simcoe, Sergei Balashev, Erin Boettcher, Sebastiano Cantalupo, Mandy C. Chen, Françoise Combes, Claude-André Faucher-Giguère, Sean D. Johnson, Hans-Rainer Klöckner, Jens-Kristian Krogager, Jennifer I-Hsiu Li, Sebastián López, Pasquier Noterdaeme, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri Zahedy   +20 more
doaj   +1 more source

Evolution of [OIII]5007 emission-line profiles in narrow emission-line galaxies

, 2011
The AGN-host co-evolution issue is investigated here by focusing on the evolution of the [\ion{O}{3}]$\lambda5007$ emission-line profile. In order to simultaneously measure both [\ion{O}{3}] line profile and circumnuclear stellar population in individual
Abazajian, Aoki, Balogh, Binney, Boller, Boroson, Boroson, Boroson, Bromley, Christopoulou, Crenshaw, Crenshaw, Crenshaw, Das, Das, Das, Davies, Elitzur, Erkens, Ferrarese, Fischer, Fischer, Gebhardt, Glazebrook, Granato, Greene, Grupe, Grupe, Haring, Heckman, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hu, Hutchings, J. Wang, J. Y. Wei, Kaiser, Kauffmann, Kewley, Komossa, Komossa, Leighly, Magorrian, Marziani, Mathur, Nandra, Nelson, Nelson, Nelson, Ruiz, Schawinski, Schawinski, Schlegel, Schlesinger, Sergeev, Shankar, Silverman, Spergel, Tremaine, Tremonti, Wang, Wang, Wang, Wang, Wang, Wang, Whittle, Wild, Wilson, Worthey, Xu, Xu, Y. F. Mao, York, Yuan, Zamanov, Zhou   +79 more
core   +1 more source

Machine learning-based photometric classification of galaxies, quasars, emission-line galaxies, and stars [PDF]

, 2023
Fatemeh Zahra Zeraatgari, Fatemeh Hafezianzade, Yanxia Zhang, Liquan Mei, Ashraf Ayubinia, Amin Mosallanezhad, Jingyi Zhang   +6 more
openalex   +1 more source

CONFIRMATION OF SMALL DYNAMICAL AND STELLAR MASSES FOR EXTREME EMISSION LINE GALAXIES AT z ∼ 2 [PDF]

, 2013
Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (∼50 km s−1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3.
M. Maseda, A. van der Wel, E. da Cunha, H. Rix, C. Pacifici, I. Momcheva, G. Brammer, M. Franx, P. V. van Dokkum, E. Bell, M. Fumagalli, N. Grogin, D. Kocevski, A. Koekemoer, B. Lundgren, D. Marchesini, E. Nelson, S. Patel, R. Skelton, A. Straughn, J. Trump, B. Weiner, K. Whitaker, S. Wuyts   +23 more
semanticscholar   +1 more source

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

Probing cosmic voids with emission-line galaxies

Frontiers in Astronomy and Space Sciences
IntroductionWe aim to provide forecasts for future line intensity mapping (LIM) observations and galaxy redshift surveys, focusing on the physical properties of low-density region of the cosmic web (voids).
Yuka Yamada, Naoki Yoshida, Naoki Yoshida   +2 more
doaj   +1 more source

Spatially Extended Low Ionization Emission Regions (LIERs) at $z\sim0.9$

, 2018
We present spatially resolved emission diagnostics for eight $z\sim0.9$ galaxies that demonstrate extended low ionization emission-line regions (LIERs) over kpc scales.
Bourque, M., Brammer, G. B., Hviding, R. E., Lundgren, B. F., Marchesini, D., Martlin, C., Momcheva, I. G., Nedkova, K. V., Pirzkal, N., Ryan, R. E., Vang, A., Wake, D. A.   +11 more
core   +1 more source