Results 131 to 140 of about 2,405 (218)

UEG Week 2025 Moderated Posters

open access: yes
United European Gastroenterology Journal, Volume 13, Issue S8, Page S189-S802, October 2025.
wiley   +1 more source

Variable X-ray absorption in the mini-broad absorption line quasar PG 1126-041

open access: yes, 2012
We present the results of a multi-epoch observational campaign on the mini-broad absorption line quasar (mini-BAL QSO) PG 1126-041 performed with XMM- Newton from 2004 to 2009.
Cappi M.   +9 more
core  

Identifying Missing Quasars from the DESI Bright Galaxy Survey

open access: yesThe Astronomical Journal
The Dark Energy Spectroscopic Instrument (DESI) cosmology survey includes a Bright Galaxy Survey (BGS), which will yield spectra for over 10 million bright galaxies ( r   2, which are either faint quasars with nearby projected companions or very bright ...
S. Juneau   +61 more
doaj   +1 more source

Evidence for quasar fast outflows being accelerated at the scale of tens of parsecs. [PDF]

open access: yesSci Adv, 2022
He Z   +16 more
europepmc   +1 more source

UEG Week 2025 Poster Presentations

open access: yes
United European Gastroenterology Journal, Volume 13, Issue S8, Page S803-S1476, October 2025.
wiley   +1 more source

Lyman Limit System with O vi in the Circumgalactic Environment of a Pair of Galaxies

open access: yesThe Astrophysical Journal
We report on the analysis of a multiphase Lyman limit system (LLS) at z = 0.39047 identified toward the background quasar FBQS J0209–0438. The O VI doublet lines associated with this absorber have a different profile from the low-ionization metals and H ...
Dheerajkumar Khonde   +5 more
doaj   +1 more source

Imprint of “Local Opacity” Effect in Gamma-Ray Spectrum of Blazar Jet

open access: yesThe Astrophysical Journal Letters
Relativistic jets from accreting supermassive black holes at cosmological distances can be powerful emitters of γ -rays. However, the precise mechanisms and locations responsible for the dissipation of energy within these jets, leading to observable γ ...
Sushmita Agarwal   +4 more
doaj   +1 more source

Little Red Dots: An Abundant Population of Faint Active Galactic Nuclei at z ∼ 5 Revealed by the EIGER and FRESCO JWST Surveys

open access: yesThe Astrophysical Journal
Characterizing the prevalence and properties of faint active galactic nuclei (AGNs) in the early Universe is key for understanding the formation of supermassive black holes (SMBHs) and determining their role in cosmic reionization.
Jorryt Matthee   +27 more
doaj   +1 more source

Tidal Disruption Events from Stripped Stars

open access: yesThe Astrophysical Journal Letters
Observations of tidal disruption events (TDEs) show signs of nitrogen enrichment reminiscent of other astrophysical sources such as active galactic nuclei and star-forming galaxies. Given that TDEs probe the gas from a single star, it is possible to test
Brenna Mockler   +4 more
doaj   +1 more source

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