Results 151 to 160 of about 111,891 (295)

Prospects for Observing High-redshift Radio-loud Quasars in the SKA Era: Paving the Way for 21 cm Forest Observations

The Astrophysical Journal
The 21 cm forest is a sensitive probe for the early heating process and small-scale structures during the epoch of reionization (EOR), to be realized with the upcoming Square Kilometre Array (SKA). Its detection relies on the availability of radio-bright
Qi Niu, Yichao Li, Yidong Xu, Hong Guo, Xin Zhang   +4 more
doaj   +1 more source

Models of the Giant Quadruple Quasar SDSS J1004+4112 [PDF]

, 2004
Liliya L. R. Williams, Prasenjit Saha
openalex   +1 more source

New detections of optical emission from kiloparsec-scale quasar jets [PDF]

, 2003
C. C. Cheung, J. F. C. Wardle, Tingdong Chen, S.P. Hariton   +3 more
openalex   +1 more source

A machine learning approach to assessing the presence of substructure in quasar host galaxies using the Hyper Suprime-Cam Subaru Strategic Program [PDF]

, 2022
Chris Nagele, J. D. Silverman, Tilman Hartwig, Junyao Li, Connor Bottrell, Xuheng Ding, Yoshiki Toba   +6 more
openalex   +1 more source

The Detection Rate of Associated Mg ii Absorption Lines in Quasars Depends on Their Radio Emission

The Astrophysical Journal
In active galactic nuclei, jet-driven feedback plays a significant role in influencing the properties of gas within their host galaxy and the circumgalactic medium.
Zhi-Fu Chen, Luis C. Ho
doaj   +1 more source

The associated absorption features in quasar spectra of the Sload Digital Sky survey .I. \MgII\ absorption doublets [PDF]

, 2018
Zhifu Chen, Huang Weirong, Ting-Ting Pang, Huang Hong-Yan, Da-Sheng Pan, Min Yao, Nong Wei-Jing, Lu Mei-Mei   +7 more
openalex   +1 more source

A Pilot Study for the CSST Slitless Spectroscopic Quasar Survey Based on Mock Data

The Astrophysical Journal
The wide survey of the Chinese Space Station Telescope (CSST) will observe a large field of 17,500 deg ^2 . The GU, GV, and GI grism observations of CSST will cover the wavelength range from 2550 to 10000 Å at a resolution of R  ∼ 200 and a depth of ...
Yuxuan Pang, Xue-Bing Wu, Yuming Fu, Rui Zhu, Bing Lyu, Huimei Wang, Xiaotong Feng   +6 more
doaj   +1 more source

The Low-Mass End of the MBH/Mhost Relation in Quasars

Advances in Astronomy, 2012
The MBH-Mhost relation in quasars has been probed only in a limited parameter space, namely, at MBH∼109 M⊙ and Mhost∼1012  M⊙. Here we present a study of 26 quasars laying in the low-mass end of the relation, down to MBH∼107 M⊙.
Roberto Decarli, Renato Falomo, Jari K. Kotilainen, Tomi Hyvönen, Michela Uslenghi, Aldo Treves   +5 more
doaj   +1 more source

Discovery of spectacular quasar-driven superbubbles in red quasars. [PDF]

Sci Adv, 2023
Shen L, Liu G, He Z, Zakamska NL, Glikman E, Greene JE, Hu W, Mou G, Wylezalek D, Rupke DSN.   +9 more
europepmc   +1 more source

An Anomaly in the Angular Distribution of Quasar Magnitudes: Evidence\n for a Bubble Universe with a Mass ~10^21 M\\odot [PDF]

, 2012
M. J. Longo
openalex   +1 more source