Results 21 to 30 of about 141,253 (114)

The Lyα emission from high-z galaxies hosting strong damped Lyα systems

, 2017
International audienceWe study the average Lyα emission associated with high-z strong (log N(H i) ≥ 21) damped Lyα systems (DLAs). We report Lyα luminosities (L_Lyα) for the full as well as various sub-samples based on N(H i), z, (r − i) colours of QSOs ...
Noterdaeme, Pasquier, Petitjean, Patrick, Joshi, Ravi, Srianand, Raghunathan   +3 more
core   +1 more source

MUSE Analysis of Gas around Galaxies (MAGG)

Astronomy & Astrophysics
We investigate the connection between strong, blended Lyα absorption systems (SBLAs) and ≈1000 Lyα-emitting galaxies (LAEs) at z ≳ 3 in 28 quasar fields from the MUSE Analysis of Gas around Galaxies (MAGG) survey. Selecting SBLAs as spectral regions with
Galbiati Marta, Tornotti Davide, Fumagalli Michele, Fossati Matteo, Pieri Matthew   +4 more
doaj   +1 more source

Gravity-driven Lyα blobs from cold streams into galaxies [PDF]

, 2010
We use high-resolution cosmological hydrodynamical adaptive mesh refinement (AMR) simulations to predict the characteristics of Lyα emission from the cold gas streams that fed galaxies in massive haloes at high redshift.
Dekel, A, Tobias Goerdt, Teyssier, R, J. R. Primack, Sternberg, A, A. Sternberg, Goerdt, T, D. Ceverino, R. Teyssier, Ceverino, D, A. Dekel, Primack, J R   +11 more
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Damped Lyα systems as spiral galaxies [PDF]

, 1997
This is an electronic version of an article published in The Astrophysical Journal. Clavel, J. et al. Damped Lyα systems as spiral galaxies.
Mollá, Mercedes, Ferrini, Federico, Díaz Beltrán, Ángeles Isabel   +2 more
core   +1 more source

Radio-detected Lyα emitters at 1.88 < z < 3.52: AGN fraction and Lyα emission

Astronomy & Astrophysics
Context. Lyα emitters (LAEs) are galaxies with strong Lyα emission, tracing early star formation and ionizing radiation. Their connection to active galactic nuclei (AGNs) is key to understanding the mechanisms behind (extended) Lyα emission. Aims.
Zhai Sai, Röttgering Huub, Gloudemans Anniek J., Mentuch Cooper Erin, Debski Maya H., Zeimann Gregory, Jarvis Matt J., Morabito Leah K., Schneider Donald P., Farrow Daniel J., Hill Gary J., Gronwall Caryl, Fu Yuming   +12 more
doaj   +1 more source

Delayed Massive-star Mechanical Feedback at Low Metallicity

The Astrophysical Journal, 2023
The classical model of massive-star mechanical feedback is based on effects at solar metallicity ( Z _⊙ ), yet feedback parameters are very different at low metallicity.
Michelle C. Jecmen, M. S. Oey
doaj   +1 more source

GA-NIFS: AGN activity in a Lyα emitter within a triple-AGN system anchored by a passive galaxy at z = 3

Astronomy & Astrophysics
Context. Massive quenched galaxies at z > 3 challenge models of early galaxy evolution, as their rapid formation and abrupt quenching require efficient feedback, which is often linked to active galactic nuclei (AGNs).
Perna Michele, Arribas Santiago, Hamed Mahmoud, D’Eugenio Francesco, Lamperti Isabella, Bunker Andrew J., Carniani Stefano, Charlot Stéphane, Maiolino Roberto, Rodríguez Del Pino Bruno, Übler Hannah, Böker Torsten, Bertola Elena, Cresci Giovanni, Venturi Giacomo, Ginolfi Michele, Villar Martín Montserrat, Zamora Sandra   +17 more
doaj   +1 more source

The clustering of galaxies in hierarchical galaxy formation models [PDF]

, 2010
Galaxy clustering encodes information about the values of cosmological parameters and also about the physical processes behind galaxy formation and evolution. The GALFORM semi-analytical model is the theoretical approach we used to model galaxy formation.
KIM, HAN,SIK, Kim, Han Sik
core  

BLUEPRINT: Blue-dominant Lyman-α emission as evidence of gas inflow in ultra-low-mass galaxies at z = 3

Astronomy & Astrophysics
We report the detection of a clumpy, blue-dominated Lyman-α (Lyα) emission at z = 3.066 located in the heart of a cosmic web filament in the MUSE eXtremely Deep Field (MXDF).
Mukherjee Tamal, Li Zhihui, Zafar Tayyaba, Nanayakkara Themiya, Tornotti Davide, Costantin Luca, Aalia Imam Uzma   +6 more
doaj   +1 more source

A High Fraction of Lyα-Emitters Among Galaxies with Extreme Emission Line Ratios at z ~ 2 [PDF]

, 2016
Star-forming galaxies form a sequence in the [O III] λ5007/Hβ versus [N II] λ6584/Hɑ diagnostic diagram, with low-metallicity, highly ionized galaxies falling in the upper left corner. Drawing from a large sample of UV-selected star-forming galaxies at z
Trainor, Ryan F., Shapley, Alice E., Pettini, Max, Steidel, Charles C., Erb, Dawn K., Strom, Allison L., Rudie, Gwen C., Reddy, Naveen A.   +7 more
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