Results 181 to 190 of about 266,062 (301)

Exploring the Link between Extreme Coronal Line Emitters and Tidal Disruption Events

The Astrophysical Journal
Galaxies with minimal or no activity from their nucleus can still exhibit significant coronal line (CL) emission, often exceeding the strength of typical narrow emission lines. Many of these CLs require ionization potentials of ≥100 eV, implying the need
Weiyu Ding, Weiwen Kong, Jipeng Sui, Yao Yao, Zheyu Lin, Wei-Jian Guo, Hu Zou   +6 more
doaj   +1 more source

DESI Spectroscopy of HETDEX Emission-line Candidates. I. Line Discrimination Validation

The Astrophysical Journal
The Hobby–Eberly Dark Energy Experiment (HETDEX) is an untargeted spectroscopic galaxy survey that uses Ly α- emitting galaxies (LAEs) as tracers of 1.9 < z < 3.5 large-scale structure. Most detections consist of a single emission line, whose identity is
Martin Landriau, Erin Mentuch Cooper, Dustin Davis, Karl Gebhardt, Robin Ciardullo, Éric Armengaud, Arjun Dey, Anand Raichoor, David J. Schlegel, Michael Wilson, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. de la Macorra, S. Ferraro, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, C. Hahn, K. Honscheid, C. Howlett, M. Ishak, S. Juneau, R. Kehoe, T. Kisner, Anthony Kremin, L. Le Guillou, Michael E. Levi, M. Manera, A. Meisner, R. Miquel, J. Moustakas, S. Nadathur, I. Pérez-Ràfols, C. Poppett, F. Prada, G. Rossi, E. Sanchez, M. Schubnell, D. Sprayberry, G. Tarlé, B. A. Weaver, R. Zhou, H. Zou, Daniel J. Farrow, Gary J. Hill, Donghui Jeong, Chenxu Liu, Shun Saito, Donald P. Schneider   +52 more
doaj   +1 more source

Hunting for extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey: MMT and 3.5 m APO observations [PDF]

, 2012
Y. I. Izotov, T. X. Thuan, N. G. Guseva
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A [C ii] 158 μm Survey of Damped Lyα Absorber Galaxies at z ∼ 4: Observations of Dense and Metal-enriched Neutral Gas within the Circumgalactic Medium of Star-forming Galaxies

The Astrophysical Journal
We present a survey undertaken with the Atacama Large Millimeter/submillimeter Array (ALMA) to study the galaxies associated with a representative sample of 16 damped Ly α absorbers (DLAs) at z  ≈ 4.1–4.5, using the [C ii ] 158 μ m ([C ii ]) line.
Marcel Neeleman, Nissim Kanekar, J. Xavier Prochaska, Marc A. Rafelski, Lordrick A. Kahinga   +4 more
doaj   +1 more source

Synthetic nebular emission from massive galaxies – II. Ultraviolet-line diagnostics of dominant ionizing sources [PDF]

, 2019
Michaela Hirschmann, Stéphane Charlot, A. Feltre, Thorsten Naab, Rachel S. Somerville, Ena Choi   +5 more
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Models of optical emission lines to investigate Narrow-Line Seyfert 1 galaxies in spectroscopic databases [PDF]

, 2018
G. La Mura, D. Bastieri, M. Berton, Sina Chen, S. Ciroi, Enrico Congiu, V. Cracco, J. H. Fan, P. Rafanelli   +8 more
openalex   +1 more source

DOUBLE-PEAKED NARROW EMISSION-LINE GALAXIES FROM THE SLOAN DIGITAL SKY SURVEY. I. SAMPLE AND BASIC PROPERTIES [PDF]

, 2012
Junqiang Ge, Chen Hu, Jian‐Min Wang, Jin‐Ming Bai, Shu Zhang   +4 more
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Lyman Continuum Leakage from Massive Leaky Starbursts: A Different Class of Emitters?

The Astrophysical Journal
The origin of Lyman continuum (LyC) photons responsible for reionizing the Universe remains largely unknown, with the fraction of escaping LyC photons from galaxies at z  ∼ 6 to 12 still uncertain.
Namrata Roy, Timothy Heckman, Alaina Henry, John Chisholm, Sophia Flury, Claus Leitherer, Matthew J. Hayes, Anne Jaskot, Zhiyuan Ji, Daniel Schaerer, Bingjie Wang, Sanchayeeta Borthakur, Xinfeng Xu, Göran Östlin   +13 more
doaj   +1 more source

Power-law Emission-line Wings and Radiation-driven Superwinds in Local Lyman Continuum Emitters

The Astrophysical Journal
We investigate broad emission-line wings, reaching ≤800 km s ^−1 , observed in 26 galaxies with Lyman continuum (LyC) observations, primarily from the Low-redshift Lyman Continuum Survey.
Lena Komarova, M. S. Oey, Rui Marques-Chaves, Ricardo Amorín, Alaina Henry, Daniel Schaerer, Alberto Saldana-Lopez, Alexandra Le Reste, Claudia Scarlata, Matthew J. Hayes, Omkar Bait, Sanchayeeta Borthakur, Cody Carr, John Chisholm, Harry C. Ferguson, Vital Gutierrez Fernandez, Brian Fleming, Sophia R. Flury, Mauro Giavalisco, Andrea Grazian, Timothy Heckman, Anne E. Jaskot, Zhiyuan Ji, Göran Östlin, Laura Pentericci, Swara Ravindranath, Trinh Thuan, Jose M. Vílchez, Gabor Worseck, Xinfeng Xu   +29 more
doaj   +1 more source

H‐like Iron Emission in Narrow‐Line Seyfert 1 Galaxies as a Temperature Diagnostic of Accretion Flows [PDF]

, 1999
M. A. Bautista, L. Titarchuk
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