Results 141 to 150 of about 18,958 (240)

A Study on the Line of Sight to Galaxies Detected at Gamma-Ray Energies

The Astrophysical Journal Letters
The large-scale universal structure comprises strands of dark matter and galaxies with large underdense volumes known as voids. We measure the fraction of the line of sight that intersects voids for active galactic nuclei (AGN) detected by Fermi Large ...
Amy Furniss, Josepf N. Amador, Olivier Hervet, Ollie Jackson, David A. Williams   +4 more
doaj   +1 more source

Extended Lyman alpha emission around bright quasars

, 2006
Quasars trace the most massive structures at high redshifts and their presence may influence the evolution of the massive host galaxies. We study the extended Lyman alpha emission line regions (EELRs) around seven bright, mostly radio-quiet quasars (QSOs)
Antonucci, Barthel, Benn, Bergeron, Bremer, Bunker, Christensen, Christensen, Crawford, Croton, Di Matteo, Dunlop, Durret, Fried, Fynbo, Haiman, Hall, Heckman, Heckman, Hook, Hopkins, Hu, Hu, Isobe, Jahnke, K. Jahnke, Koratkar, L. Christensen, L. Wisotzki, Lehnert, McCarthy, Møller, Petitjean, Roth, S. F. Sánchez, Schlegel, Scott, Songaila, Springel, Steidel, Sánchez, Sánchez, Sánchez, Sánchez, Sánchez, Tytler, van Ojik, Vanden Berk, Villar-Martin, Villar-Martín, Weidinger, Weidinger, White, Wisotzki   +53 more
core   +3 more sources

Polarization of Quasars: Electron Scattering in the Broad Absorption Line Region

, 2005
It is widely accepted that the broad absorption line region (BALR) exists in most (if not all) quasars with a small covering factor. Recent works showed that the BALR is optically thick to soft and even medium energy X-rays, with a typical hydrogen ...
Wang, Hui-Yuan, Wang, Jun-Xian, Wang, Ting-Gui   +2 more
core   +1 more source

Q 0002 - 422: a QSO with zabs << zem [PDF]

, 1977
J. A. J. Whelan, R. F. Carswell, M. G. Smith   +2 more
openalex   +1 more source

Extremely Red Galaxies at z = 5–9 with MIRI and NIRSpec: Dusty Galaxies or Obscured Active Galactic Nuclei?

The Astrophysical Journal
We study a new population of extremely red objects (EROs) recently discovered by the James Webb Space Telescope (JWST) based on their NIRCam colors F277W − F444W > 1.5 mag.
Guillermo Barro, Pablo G. Pérez-González, Dale D. Kocevski, Elizabeth J. McGrath, Jonathan R. Trump, Raymond C. Simons, Rachel S. Somerville, L. Y. Aaron Yung, Pablo Arrabal Haro, Hollis B. Akins, Michaela B. Bagley, Nikko J. Cleri, Luca Costantin, Kelcey Davis, Mark Dickinson, Steve L. Finkelstein, Mauro Giavalisco, Carlos Gómez-Guijarro, Nimish P. Hathi, Michaela Hirschmann, Benne W. Holwerda, Marc Huertas-Company, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Ray A. Lucas, Casey Papovich, Nor Pirzkal, Lise-Marie Seillé, Sandro Tacchella, Stijn Wuyts, Stephen M. Wilkins, Alexander de la Vega, Guang Yang, Jorge A. Zavala   +33 more
doaj   +1 more source

MLACP 2.0: An updated machine learning tool for anticancer peptide prediction. [PDF]

Comput Struct Biotechnol J, 2022
Thi Phan L, Woo Park H, Pitti T, Madhavan T, Jeon YJ, Manavalan B.   +5 more
europepmc   +1 more source

Cosmological Evidence from QSOs and Radio Galaxies [PDF]

, 1972
M. J. Rees
openalex   +1 more source

On the In (I + z) Periodicity in QSO Redshifts [PDF]

, 1977
D. Wills
openalex   +1 more source

The Optical Variability of QSO's

, 1995
The long-term variability of a sample of 486 optically selected QSOs in the fields of the SA94, SA57 and SGP has been studied. The relations of variability with luminosity and redshift have been investigated by means of statistical estimators that are ``robust'' and allow at the same time to eliminate the influence of the measurement errors.
Cristiani, S., Trentini, S., La Franca, F., Aretxaga, I., Andreani, P., Vio, R., Gemmo, A.   +6 more
openaire   +2 more sources

Gamma-ray burst data strongly favour the three-parameter fundamental plane (Dainotti) correlation over the two-parameter one. [PDF]

Mon Not R Astron Soc, 2022
Cao S, Dainotti M, Ratra B.
europepmc   +1 more source