Results 71 to 80 of about 76,004 (221)

Powerful Radio-loud Quasars Are Triggered by Galaxy Mergers in the Cosmic Bright Ages

The Astrophysical Journal
While supermassive black holes are ubiquitous features of galactic nuclei, only a small minority are observed during episodes of luminous accretion. The physical mechanism(s) driving the onset of fueling and ignition in these active galactic nuclei (AGN)
Peter Breiding, Marco Chiaberge, Erini Lambrides, Eileen T. Meyer, S. P. Willner, Bryan Hilbert, Martin Haas, George Miley, Eric S. Perlman, Peter Barthel, Christopher P. O’Dea, Alessandro Capetti, Belinda Wilkes, Stefi A. Baum, Duccio F. Macchetto, William Sparks, Grant Tremblay, Colin Norman   +17 more
doaj   +1 more source

Similarity between Compact Extremely Red Objects Discovered with JWST in Cosmic Dawn and Blue-excess Dust-obscured Galaxies Known in Cosmic Noon

The Astrophysical Journal Letters, 2023
Spatially compact objects with extremely red color in the rest-frame optical to near-infrared (0.4–1 μ m) and blue color in the rest-frame ultraviolet (UV; 0.2–0.4 μ m) have been discovered at 5 < z < 9 using the James Webb Space Telescope (JWST).
Akatoki Noboriguchi, Akio K. Inoue, Tohru Nagao, Yoshiki Toba, Toru Misawa   +4 more
doaj   +1 more source

Two Radio Cores in GPS J1543-0757: A New Dual Supermassive Black Hole System?

The Astrophysical Journal
We report on the discovery of a dual supermassive black hole system in the radio galaxy J1543−0757, with a projected separation between the two black holes of ∼46 mas. The result is based on recent multifrequency observations using the Very Long Baseline
Xiaopeng Cheng, Bong Won Sohn
doaj   +1 more source

Identifying Active Galactic Nuclei at z ∼ 3 from the HETDEX Survey Using Machine Learning

The Astronomical Journal, 2023
We used data from the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) to study the incidence of AGN in continuum-selected galaxies at z ∼ 3.
Valentina Tardugno Poleo, Steven L. Finkelstein, Gene Leung, Erin Mentuch Cooper, Karl Gebhardt, Daniel J. Farrow, Eric Gawiser, Greg Zeimann, Donald P. Schneider, Leah Morabito, Daniel Mock, Chenxu Liu   +11 more
doaj   +1 more source

Shocked POststarbust Galaxy Survey I: Candidate Poststarbust Galaxies with Emission Line Ratios Consistent with Shocks [PDF]

, 2016
[Abridged] The Shocked POststarburst Galaxy Survey (SPOGS) aims to identify transforming galaxies, in which the nebular lines are excited via shocks instead of through star formation processes.
Alatalo, Katherine, Appleton, Philip N., Cales, Sabrina L., Kewley, Lisa J., Lacy, Mark, Lanz, Lauranne, Medling, Anne M., Nyland, Kristina, Rich, Jeffrey A.   +8 more
core   +3 more sources

Toll‐like receptor 4 mediates lipopolysaccharide‐induced emesis

British Journal of Pharmacology, EarlyView.
Background and Purpose Lipopolysaccharide (LPS) induces inflammation and sepsis through Toll‐like receptor 4 (TLR4) activation. Common laboratory animals do not exhibit emesis, but administration of LPS in piglets, cats, and dogs induces emesis via peripheral mechanisms.
Luping Liu, Zengbing Lu, Julia Yuen Hang Liu, Man Piu Ngan, Kai‐Hei Tse, John Anthony Rudd   +5 more
wiley   +1 more source

GOALS-JWST: Gas Dynamics and Excitation in NGC 7469 Revealed by NIRSpec

The Astrophysical Journal
We present new JWST NIRSpec integral field spectroscopy (IFS) data for the luminous infrared galaxy NGC 7469, a nearby (70.6 Mpc) active galaxy with a Seyfert 1.5 nucleus that drives a highly ionized gas outflow and a prominent nuclear star-forming ring.
Marina Bianchin, Vivian U, Yiqing Song, Thomas S.-Y. Lai, Raymond P. Remigio, Loreto Barcos-Muñoz, Tanio Díaz-Santos, Lee Armus, Hanae Inami, Kirsten L. Larson, Aaron S. Evans, Torsten Böker, Justin A. Kader, Sean T. Linden, Vassilis Charmandaris, Matthew A. Malkan, Jeff Rich, Thomas Bohn, Anne M. Medling, Sabrina Stierwalt, Joseph M. Mazzarella, David R. Law, George C. Privon, Susanne Aalto, Philip Appleton, Michael J. I. Brown, Victorine A. Buiten, Luke Finnerty, Christopher C. Hayward, Justin Howell, Kazushi Iwasawa, Francisca Kemper, Jason Marshall, Jed McKinney, Francisco Müller-Sánchez, Eric J. Murphy, Paul P. van der Werf, David B. Sanders, Jason Surace   +38 more
doaj   +1 more source

Unraveling Joint Evolution of Bars, Star Formation, and Active Galactic Nuclei of Disk Galaxies

The Astrophysical Journal, 2023
We aim to unravel the interplay between bars, star formation (SF), and active galactic nuclei (AGNs) in barred galaxies. To this end, we utilize the SDSS DR12 to select a sample of nearby (0.02 < z < 0.06) disk galaxies that are suitable for bar ...
Woong-Bae G. Zee, Sanjaya Paudel, Jun-Sung Moon, Suk-Jin Yoon   +3 more
doaj   +1 more source

Nonthermal Nuclei in 374 UGC Galaxies [PDF]

International Astronomical Union Colloquium, 1998
AbstractThe VLA was used at 1.5-2 arcsec resolution at 20cm to search for compact continuum sources in the inner regions of 374 UGC galaxies.
J. M. Wrobel, J. J. Condon, J. Machalski
openaire   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source