Results 141 to 150 of about 23,272 (235)

No Galaxy-scale [C ii] Fast Outflow in the z = 6.72 Red Quasar HSC J1205–0000

The Astrophysical Journal
HSC 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, Takuma Izumi, Kouichiro Nakanishi, Takeshi Okuda, Michael A. Strauss, Masatoshi Imanishi, Yoshiki Matsuoka, Yoshiki Toba, Hideki Umehata, Takuya Hashimoto, Shunsuke Baba, Tomotsugu Goto, Toshihiro Kawaguchi, Kotaro Kohno, Dragan Salak, Taiki Kawamuro, Kazushi Iwasawa, Masafusa Onoue, Chien-Hsiu Lee, Kianhong Lee   +19 more
doaj   +1 more source

Jet reorientation in active galactic nuclei: two winged radio galaxies [PDF]

, 2002
J. Dennett-Thorpe, P. A. G. Scheuer, R. A. Laing, A. H. Bridle, G. G. Pooley, W. Reich   +5 more
openalex   +1 more source

FRAMEx. V. Radio Spectral Shape at Central Subparsec Region of Active Galactic Nuclei

The Astrophysical Journal
We 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, Megan C. Johnson, Nathan J. Secrest, Mario Gliozzi, Phillip J. Cigan, Travis C. Fischer, Alexander J. Van Der Horst   +6 more
doaj   +1 more source

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

X-ray properties of coronal emission in radio quiet active galactic nuclei

Frontiers in Astronomy and Space Sciences
Active galactic nuclei (AGN) are powerful sources of panchromatic radiation. All AGN emit in X-rays, contributing around 5%–10% of the AGN bolometric luminosity.
Sibasish Laha, Sibasish Laha, Sibasish Laha, Claudio Ricci, Claudio Ricci, John C. Mather, Ehud Behar, Luigi Gallo, Frederic Marin, Rostom Mbarek, Rostom Mbarek, Amelia Hankla   +11 more
doaj   +1 more source

Relation between radio core length and black hole mass for active galactic nuclei [PDF]

, 2002
Xinwu Cao, Dongrong Jiang
openalex   +1 more source

Testing of Inverse Compton Models for Active Galactic Nuclei with Gamma‐Ray and Radio Observations [PDF]

, 2003
A. Lähteenmäki, E. Valtaoja
openalex   +1 more source

A Dichotomy in the 1–24 GHz Parsec-scale Radio Spectra of Radio-quiet Quasars

The Astrophysical Journal
We 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, Ari Laor, Ehud Behar, Ranieri D. Baldi, Joseph D. Gelfand, Amy E. Kimball   +5 more
doaj   +1 more source

Radio-loud Active Galactic Nuclei in the Context of the Eigenvector 1 Parameter Space [PDF]

, 2003
J. W. Sulentic, S. Zamfir, P. Marziani, R. Bachev, M. Calvani, D. Dultzin‐Hacyan   +5 more
openalex   +1 more source

Prospects of Detecting a Jet in Sagittarius A* with Very-long-baseline Interferometry

The Astrophysical Journal
Event Horizon Telescope (EHT) images of the horizon-scale emission around the Galactic center supermassive black hole Sagittarius A* (Sgr A*) favor accretion flow models with a jet component. However, this jet has not been conclusively detected.
Erandi Chavez, Sara Issaoun, Michael D. Johnson, Paul Tiede, Christian Fromm, Yosuke Mizuno   +5 more
doaj   +1 more source