Results 111 to 120 of about 5,191,368 (191)

The first scientific experiment using Global e-VLBI observations: a multiwavelength campaign on the gamma-ray Narrow-Line Seyfert 1 PMN J0948+0022 [PDF]

, 2010
The detection of gamma-ray emission by Fermi-LAT from the radio loud Narrow Line Seyfert 1 PMN J0948+0022 (Abdo et al. 2009, ApJ 699, 976) triggered a multi-wavelength campaign between March and July 2009. Given its high compactness (Doi et al.
Paragi, Zsolt, Tzioumis, A.K., Foschini, L, Blanchard, J, Hong, X, Giroletti, Marcello, Kadler, M, Bignall, Hayley, Gabanyi, K, Doi, A, Nagai, H, Kino, M, Colomer, F, Sekido, M, Szomoru, A, Langevelde, H.J. van, Phillips, C   +16 more
core  

Mapping a Quasar Outflow from Parsec to Kiloparsec Scales: A Combined HST Absorption and VLT Emission Investigation

The Astrophysical Journal
Linking nuclear winds to galactic-scale outflows remains a major observational challenge in understanding the multiscale physics of active galactic nucleus feedback.
Mayank Sharma, Travis C. Fischer, Manuela Bischetti, Nahum Arav, Fabrizio Fiore, Chiara Feruglio, Manoj Ghosh   +6 more
doaj   +1 more source

A SPectroscopic Survey of Biased Halos In the Reionization Era (ASPIRE): JWST Supports Earlier Reionization around [O iii] Emitters

The Astrophysical Journal
Understanding when and how reionization happened is crucial for studying the early structure formation and the properties of the first galaxies in the Universe. At z > 5.5, the observed intergalactic medium (IGM) optical depth shows a significant scatter,
Xiangyu Jin, Jinyi Yang, Xiaohui Fan, Feige Wang, Koki Kakiichi, Romain A. Meyer, George D. Becker, Siwei Zou, Eduardo Bañados, Jaclyn B. Champagne, Valentina D’Odorico, Minghao Yue, Sarah E. I. Bosman, Zheng Cai, Anna-Christina Eilers, Joseph F. Hennawi, Hyunsung D. Jun, Mingyu Li, Zihao Li, Weizhe Liu, Maria Pudoka, Sindhu Satyavolu, Fengwu Sun, Wei Leong Tee, Yunjing Wu   +24 more
doaj   +1 more source

ePoster

European Journal of Neurology, Volume 32, Issue S1, June 2025.
wiley   +1 more source

The location and kinematics of the emission line regions in Active Galactic Nuclei [PDF]

, 2008
This thesis contains the results from a study of the optical emission lines of various samples of active galactic nuclei (AGN). We have used three separate techniques to determine the precise kinematics and the relative location of the emission line ...
Mullaney, J R, Mullaney, J.R.
core  

The Cosmic Evolution and Spatial Distribution of Multiphase Gas Associated with QSOs

The Astrophysical Journal Letters
We investigate the multiphase gas surrounding QSOs traced by 33 absorption lines (e.g., Ly α , C iv , Fe ii , Mg ii , etc.) in the stacked spectra of background sources, using the Early Data Release from the Dark Energy Spectroscopic Instrument.
Zeyu Chen, Enci Wang, Hu Zou, Haoran Yu, Zhicheng He, Huiyuan Wang, Yang Gao, Cheqiu Lyu, Cheng Jia, Chengyu Ma, Weiyu Ding, Runyu Zhu, Xu Kong   +12 more
doaj   +1 more source

QUASARS, CARBON, AND SUPERNOVAE: EXPLORING THE DISTRIBUTION OF ELEMENTS IN AN EXPANDING UNIVERSE [PDF]

, 2013
This thesis consists of three different studies with common goal of understanding the constituents and structures of the universe. The current understanding of galaxy formation is not complete.
Vikas, Shailendra
core  

MUSEQuBES: Connecting H i Absorption with Lyα Emitters at z ≈ 3.3

The Astrophysical Journal
We present a comprehensive analysis of H i absorption around 96 Ly α emitters (LAEs) at z  ≈ 3.3 (median Ly α luminosity ≈10 ^42 erg s ^−1 ). These LAEs were identified within eight MUSE fields, each $1^{\prime} \times 1^{\prime} $ on the sky and ...
Eshita Banerjee, Sowgat Muzahid, Joop Schaye, Jérémy Blaizot, Nicolas Bouché, Sebastiano Cantalupo, Sean D. Johnson, Jorryt Matthee, Anne Verhamme   +8 more
doaj   +1 more source

Deep Learning–based Pseudocontinuum Fitting of C iv Emission-line Regions for High-quality Absorption-line Measurement

The Astrophysical Journal Supplement Series
Intrinsic associated absorption lines (AALs) in quasar spectra play a crucial role in providing insights into the chemical and physical properties of quasar outflows, host galaxies, and their surrounding interstellar medium. Affected by the complexity of
Ming-Liang Yao, Feng Wang, Ying Mei, Hui Deng, Wei-Rong Huang   +4 more
doaj   +1 more source

Spectroscopy of the double quasars Q1343+266A, B: The relationship between galaxies and quasi-stellar object C IV absorption lines

The Astrophysical Journal, 1994
Arlin P. S. Crotts, Jill Bechtold, Yihu Fang, Robert C. Duncan   +3 more
openaire   +1 more source