Results 121 to 130 of about 83,297 (253)

On Quasar Masses and Quasar Host Galaxies [PDF]

The Astrophysical Journal, 1998
Accepted for publication in ApJ Letters, 7 pages, aas2pp4 ...
openaire   +2 more sources

Broadband short term X‐ray variability of the quasar PDS 456 [PDF]

, 2016
G. A. Matzeu, J. N. Reeves, E. Nardini, V. Braito, M. T. Costa, F. Tombesi, J. Gofford   +6 more
openalex   +1 more source

Constraining Dark Matter with the Long-Term Variability of Quasars [PDF]

, 2006
Erik Zackrisson, N. Bergvall, Phillip Helbig   +2 more
openalex   +1 more source

Clustering of Ly-alpha emitters around luminous quasars at z = 2-3: an alternative probe of reionization on galaxy formation

, 2011
Narrowband observations have detected no Ly-alpha emission within a 70 pMpc^3 volume centered on the z = 2.168 quasar PKS 0424-131. This is in contrast to surveys of Ly-alpha emitters in the field at similar redshifts and flux limits, which indicate that
Babul, Barkana, Barkana, Barkana, Blanc, Bland-Hawthorn, Bland-Hawthorn, Bolton, Bouwens, Cantalupo, Cepa, Dayal, Dijkstra, Dijkstra, Dijkstra, Dijkstra, Efstathiou, Fan, Faucher-Giguère, Francis, Gawiser, Gnedin, Gronwall, Gunn, Hamana, Iliev, J. Stuart B. Wyithe, Jones, Joss Bland-Hawthorn, Kaiser, Kashikawa, Kennicutt, Kepner, Kitayama, Kitayama, Komatsu, Laursen, Loren R. Bruns, Marcelin, Mark Dijkstra, Miralda Escudé, Mo, Nilsson, Osterbrock, Ouchi, Overzier, Pirzkal, Press, Schaerer, Schirber, Shapley, Sharp, Shen, Sheth, Sokolowski, Taylor, Thoul, Veilleux, Venemans, Wyithe   +59 more
core   +1 more source

Fast Outflow in the Host Galaxy of the Luminous z = 7.5 Quasar J1007+2115

The Astrophysical Journal
The James Webb Space Telescope opens a new window to directly probe luminous quasars powered by billion solar mass black holes in the Epoch of Reionization and their coevolution with massive galaxies with unprecedented details.
Weizhe Liu, Xiaohui Fan, Jinyi Yang, Eduardo Bañados, Feige Wang, Julien Wolf, Aaron J. Barth, Tiago Costa, Roberto Decarli, Anna-Christina Eilers, Federica Loiacono, Yue Shen, Emanuele Paolo Farina, Xiangyu Jin, Hyunsung D. Jun, Mingyu Li, Alessandro Lupi, Madeline A. Marshall, Zhiwei Pan, Maria Pudoka, Ming-Yang Zhuang, Jaclyn B. Champagne, Huan Li, Fengwu Sun, Wei Leong Tee, Andrey Vayner, Haowen Zhang   +26 more
doaj   +1 more source

First Results from the JWST Early Release Science Program Q3D: The Fast Outflow in a Red Quasar at z = 0.44

The Astrophysical Journal
Quasar feedback may play a key role in the evolution of massive galaxies. The dust-reddened quasar F2M110648.35+480712 at z = 0.4352 is one of the few cases at its redshift that exhibits powerful quasar feedback through bipolar outflows.
Weizhe Liu, Sylvain Veilleux, Swetha Sankar, David S. N. Rupke, Nadia L. Zakamska, Dominika Wylezalek, Andrey Vayner, Caroline Bertemes, Yuzo Ishikawa, Yu-Ching Chen, Jenny E. Greene, Timothy Heckman, Guilin Liu, Hsiao-Wen Chen, Dieter Lutz, Sean D. Johnson, Nicole P. H. Nesvadba, Patrick Ogle, Nadiia Diachenko, Andy D. Goulding, Kevin N. Hainline, Fred Hamann, Hui Xian Grace Lim, Nora Lützgendorf, Vincenzo Mainieri, Ryan McCrory, Grey Murphree, Lu Shen, Eckhard Sturm, Lillian Whitesell   +29 more
doaj   +1 more source

Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning

The Astrophysical Journal
We present a sample of 12 quasar candidates with highly variable soft X-ray emission, selected from the fourth XMM-Newton Serendipitous Source Catalog (4XMM-DR13), using random forest (RF).
Heng Wang, Yanli Ai, Yanxia Zhang, Yuming Fu, Wenfeng Wen, Liming Dou, Xue-Bing Wu, Xiangru Li, Zhiying Huo   +8 more
doaj   +1 more source

QuASAR: Quality Assessment of Spatial Arrangement Reproducibility in Hi-C Data [PDF]

, 2017
Michael E.G. Sauria, James Taylor
openalex   +1 more source

Estimating the Sunyaev - Zel'dovich signal from quasar hosts using a Halo Occupation Distribution based approach [PDF]

, 2015
Dhruba Dutta Chowdhury
openalex   +1 more source

Galaxy and Mass Assembly (GAMA). The Properties of Quasar Host Galaxies: Star Formation Histories and Stellar Populations

The Astrophysical Journal
We investigated the star formation history and stellar populations of a sample of 205 Type I quasar host galaxies (0.1 < z < 0.35) and compared them with normal (nonactive) galaxies of the same mass and redshift within the volume of the Galaxy and Mass ...
Maria B. Stone, Roberto De Propris, Clare Wethers, Jari Kotilainen, Nischal Acharya, Benne Holwerda, Andrew M. Hopkins, Kevin Pimbblet   +7 more
doaj   +1 more source