Results 1 to 10 of about 113,123 (219)

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

The Astrophysical Journal, 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   +2 more sources

GLEAM: Galaxy Line Emission & Absorption Modeling [PDF]

The Astronomical Journal, 2021
Abstract We present Galaxy Line Emission & Absorption Modeling (gleam), a Python tool for fitting Gaussian models to emission and absorption lines in large samples of 1D extragalactic spectra. gleam is tailored to work well in batch mode without much human interaction.
Andra Stroe, Victor-Nicolae Savu
openaire   +2 more sources

The assembly bias of emission-line galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT The next generation of spectroscopic surveys will target emission-line galaxies (ELGs) to produce constraints on cosmological parameters. We study the large-scale structure traced by ELGs using a combination of a semi-analytical model of galaxy formation, a code that computes the nebular emission from H ii regions using the ...
Esteban Jiménez, Nelson Padilla, Sergio Contreras, Idit Zehavi, Carlton M Baugh, Álvaro Orsi   +5 more
openaire   +3 more sources

Modelling emission lines in star-forming galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We present a new model to compute the luminosity of emission lines in star-forming galaxies and apply this in the semi-analytical galaxy formation code galform. The model combines a pre-computed grid of H II region models with an empirical determination of how the properties of H II regions depend on the macroscopic properties ...
C M Baugh, Cedric G Lacey, Violeta Gonzalez-Perez, Giorgio Manzoni   +3 more
openaire   +3 more sources

Study of star formation rate and metallicity of the low redshift (z < 0.02) dwarf galaxies

Bibechana, 2021
In this paper, we have presented an analysis of emission lines from two dwarf galaxies. We analyzed the strongest emission lines of wavelength ranging from 4100 Å to 6700 Å.
S. P. Gautam, A. Silwal, N. Lamichhane, A. K. Jha, B. Aryal   +4 more
doaj   +3 more sources

The galaxy–halo connection of emission-line galaxies in IllustrisTNG [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We employ the hydrodynamical simulation IllustrisTNG-300-1 to explore the halo occupation distribution (HOD) and environmental dependence of luminous star-forming emission-line galaxies (ELGs) at z ∼ 1. Such galaxies are key targets for current and upcoming cosmological surveys.
Boryana Hadzhiyska, Sandro Tacchella, Sownak Bose, Daniel J Eisenstein   +3 more
openaire   +3 more sources

UNITSIM-Galaxies: data release and clustering of emission-line galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT New surveys such as European Space Agencys (ESA’s) Euclid mission are planned to map with unprecedented precision the large-scale structure of the Universe by measuring the 3D positions of tens of millions of galaxies. It is necessary to develop theoretically modelled galaxy catalogues to estimate the expected performance and to
Alexander Knebe, Daniel Lopez-Cano, Santiago Avila, Ginevra Favole, Adam R H Stevens, Violeta Gonzalez-Perez, Guillermo Reyes-Peraza, Gustavo Yepes, Chia-Hsun Chuang, Francisco-Shu Kitaura   +9 more
openaire   +3 more sources

Finding Peas in the Early Universe with JWST

The Astrophysical Journal Letters, 2023
The Early Release Observations (EROs) of JWST beautifully demonstrate the promise of JWST in characterizing the universe at Cosmic Dawn. We analyze the Near Infrared Spectrograph ERO spectra of three z ∼ 8 galaxies to determine their metallicities, gas ...
James E. Rhoads, Isak G. B. Wold, Santosh Harish, Keunho J. Kim, John Pharo, Sangeeta Malhotra, Austen Gabrielpillai, Tianxing Jiang, Huan Yang   +8 more
doaj   +1 more source

Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey

The Astrophysical Journal Supplement Series, 2023
This article reports a sample of 1830 strong [O iii ] λ 5007 emission-line compact galaxies discovered with the LAMOST spectroscopic survey and the photometric catalog of the Sloan Digital Sky Survey.
Siqi Liu, A-Li Luo, Wei Zhang, Xiao Kong, Yan-Xia Zhang, Shi-Yin Shen, Yong-Heng Zhao   +6 more
doaj   +1 more source

Understanding Galaxy Evolution Through Emission Lines [PDF]

Annual Review of Astronomy and Astrophysics, 2019
We review the use of emission lines for understanding galaxy evolution, focusing on excitation source, metallicity, ionization parameter, ISM pressure, and electron density. We discuss the physics, benefits, and caveats of emission line diagnostics, including the effects of theoretical model uncertainties, diffuse ionized gas, and sample selection ...
Kewley, Lisa, Nicholls, David, Sutherland, Ralph   +2 more
openaire   +3 more sources