Results 121 to 130 of about 17,110 (224)

Quasars/orange-spectroscopy: Release 0.3.9

, 2018
<p>[ENH] Averaging widget [FIX] Future compatibility for refactored owscatterplotgraph from Orange [ENH] owspectra: added top and right exes (without values)</p ...
larazupan, Letizia Sammut, Scott M Rosendahl, Marko Toplak, Ajda, borondics, achimkohler, Stuart Read   +7 more
core   +1 more source

High-redshift obscured quasars

, 2007
Using mid-infrared and radio criteria, we select a sample of candidate z~2 obscured quasars. Optical spectroscopy confirms about half of these as type-2 quasars, and modelling the population suggests 50-80% of the quasars are obscured.
Rawlings, Steve2007, Martinez-Sansigre, Alejo, Rawlings, S, Martinez-Sansigre, A   +3 more
core  

Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XVII. Black Hole Mass Distribution at z ∼ 6 Estimated via Spectral Comparison with Low-z Quasars

The Astrophysical Journal
We report the distribution of black hole (BH) masses and Eddingont ratios estimated for a sample of 131 low luminosity quasars in the early cosmic epoch (5.6 < z < 7.0).
Ayumi Takahashi, Yoshiki Matsuoka, Masafusa Onoue, Michael A. Strauss, Nobunari Kashikawa, Yoshiki Toba, Kazushi Iwasawa, Masatoshi Imanishi, Masayuki Akiyama, Toshihiro Kawaguchi, Akatoki Noboriguchi, Chien-Hsiu Lee   +11 more
doaj   +1 more source

EIGER. V. Characterizing the Host Galaxies of Luminous Quasars at z ≳ 6

The Astrophysical Journal
We report JWST/NIRCam measurements of quasar host galaxy emissions and supermassive black hole (SMBH) masses for six quasars at 5.9 < z < 7.1 in the Emission-line galaxies and Intergalactic Gas in the Epoch of Reionization (EIGER) project. We obtain deep
Minghao Yue, Anna-Christina Eilers, Robert A. Simcoe, Ruari Mackenzie, Jorryt Matthee, Daichi Kashino, Rongmon Bordoloi, Simon J. Lilly, Rohan P. Naidu   +8 more
doaj   +1 more source

Reliable Identification of Binary Supermassive Black Holes from Rubin Observatory Time-domain Monitoring

The Astrophysical Journal
Periodic signatures in time-domain observations of quasars have been used to search for binary supermassive black holes (SMBHs). These searches, across existing time-domain surveys, have produced several hundred candidates.
Megan C. Davis, Kaylee E. Grace, Jonathan R. Trump, Jessie C. Runnoe, Amelia Henkel, Laura Blecha, W. N. Brandt, J. Andrew Casey-Clyde, Maria Charisi, Caitlin A. Witt   +9 more
doaj   +1 more source

Environments around Quasars at z ∼ 3 Revealed by Wide-field Imaging with Subaru HSC and CFHT

The Astrophysical Journal
We examine the local density environments around 67 quasars at z ∼ 3 by combining the imaging data of Hyper Suprime-Cam Subaru Strategic Program and Canada–France–Hawaii Telescope Large Area U -band Deep Survey over about 20 deg ^2 .
Yuta Suzuki, Hisakazu Uchiyama, Yoshiki Matsuoka, Jun Toshikawa, Stephen Gwyn, Masatoshi Imanishi, Chengze Liu, Akatoki Noboriguchi, Marcin Sawicki, Yoshiki Toba   +9 more
doaj   +1 more source

An Energetics of Quasar [PDF]

Progress of Theoretical Physics, 1965
openaire   +1 more source

ASPIRE: The Environments and Dark Matter Halos of Luminous Quasars in the Epoch of Reionization

The Astrophysical Journal
We present a systematic study of the environments of 25 luminous quasars at z  > 6.5 from the ASPIRE program. Using JWST/NIRCam wide-field slitless spectroscopy data, we identified 487 galaxies at 5.3 ≲  z  ≲ 7.0 exhibiting [O iii ] emission. Among these,
Feige Wang, Jaclyn B. Champagne, Jiamu Huang, Jinyi Yang, Joseph F. Hennawi, Xiaohui Fan, Haowen Zhang, Tiago Costa, Roberto Decarli, Melanie Habouzit, Fengwu Sun, Eduardo Bañados, Xiangyu Jin, Koki Kakiichi, Romain A. Meyer, Yunjing Wu, Silvia Belladitta, Laura Blecha, Sarah E. I. Bosman, Zheng Cai, Thomas Connor, Frederick B. Davies, Anna-Christina Eilers, Zoltán Haiman, Hyunsung D. Jun, Mingyu Li, Zihao Li, Weizhe Liu, Alessandro Lupi, Jianwei Lyu, Chiara Mazzucchelli, Masafusa Onoue, Elia Pizzati, Maria Pudoka, Sofía Rojas-Ruiz, Jan-Torge Schindler, Yue Shen, Wei Leong Tee, Benny Trakhtenbrot, Maxime Trebitsch, Marianne Vestergaard, Marta Volonteri, Fabian Walter, Huanian Zhang, Siwei Zou   +44 more
doaj   +1 more source

Author Correction: QuasAr Odyssey: the origin of fluorescence and its voltage sensitivity in microbial rhodopsins. [PDF]

Nat Commun, 2022
Silapetere A, Hwang S, Hontani Y, Fernandez Lahore RG, Balke J, Escobar FV, Tros M, Konold PE, Matis R, Croce R, Walla PJ, Hildebrandt P, Alexiev U, Kennis JTM, Sun H, Utesch T, Hegemann P.   +16 more
europepmc   +1 more source

Quasar Lifetime Measurements from Extended Lyα Nebulae at z ∼ 6

The Astrophysical Journal
The existence of billion-solar-mass black holes hosted in luminous quasars within the first gigayear of cosmic history poses a challenge to our understanding of supermassive black hole (SMBH) growth.
Dominika Ďurovčíková, Anna-Christina Eilers, Romain A. Meyer, Emanuele Paolo Farina, Eduardo Bañados, Frederick B. Davies, Joseph F. Hennawi, Chiara Mazzucchelli, Robert A. Simcoe, Fabian Walter   +9 more
doaj   +1 more source