Results 141 to 150 of about 62,437 (252)
No Galaxy-scale [C ii] Fast Outflow in the z = 6.72 Red Quasar HSC J1205–0000
The Astrophysical JournalHSC 120505.09-000027.9 (J1205–0000) is one of the highest redshift ( z = 6.72) dust-reddened quasars (red quasars) known to date. We present an improved analysis of Atacama Large Millimeter/submillimeter Array data of the [C ii ] 158 μ m line and the ...
Mahoshi Sawamura +19 more
doaj +1 more source
Analysis of Jet Dynamics and Collimation Characteristics of 0241+622 on Parsec Scales
The Astrophysical JournalWe conducted a detailed analysis of the jet structure and dynamics of the source 0241+622 on milliarcsecond scales. We stacked images from multiple epochs to better recover the cross section of the jet. By analyzing the relationship between jet width and
Haitian Shang +3 more
doaj +1 more source
SPITZERMID-INFRARED SPECTROSCOPY OF COMPACT SYMMETRIC OBJECTS: WHAT POWERS RADIO-LOUD ACTIVE GALACTIC NUCLEI? [PDF]
, 2010 Kyle Willett +3 more
openalex +1 more source
Powerful Radio-loud Quasars Are Triggered by Galaxy Mergers in the Cosmic Bright Ages
The Astrophysical JournalWhile 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 +17 more
doaj +1 more source
The Astrophysical JournalWe report the discovery of J1218+1813, a circular diffuse radio source detected in the Very Large Array (VLA) FIRST survey at 1400 MHz. The source has an angular diameter of approximately one arcminute, corresponding to a physical size of ∼180 kpc, and ...
Shobha Kumari +2 more
doaj +1 more source
The density of extremely red objects around high-z radio-loud active galactic nuclei [PDF]
, 2000 A. Cimatti +3 more
openalex +1 more source
FRAMEx. V. Radio Spectral Shape at Central Subparsec Region of Active Galactic Nuclei
The Astrophysical JournalWe present results from the Very Long Baseline Array multifrequency (1.6, 4.4, 8.6, and 22 GHz), high-sensitivity (∼25 μ Jy beam ^−1 ), subparsec-scale (
Onic I. Shuvo +6 more
doaj +1 more source
MWA and VLA Observations of Diffuse Radio Lobes in M87
The Astrophysical JournalThis study investigates the projected, quasi-symmetric ∼46 kiloparsec-scale diffuse radio lobes surrounding the giant elliptical galaxy M87, utilizing well-sampled wideband (60 MHz–10.55 GHz) observations from the Murchison Widefield Array and Very Large
Linhui Wu +14 more
doaj +1 more source
A Dichotomy in the 1–24 GHz Parsec-scale Radio Spectra of Radio-quiet Quasars
The Astrophysical JournalWe present the parsec-scale radio spectra of a representative sample of 13 Palomar–Green radio-quiet quasars, based on our new Very Long Baseline Array (VLBA) observations at 8.4 and 23.6 GHz and our earlier VLBA studies at 1.5 and 5.0 GHz.
Sina Chen +5 more
doaj +1 more source