Results 71 to 80 of about 17,110 (224)
Quasars Probing Quasars. IX. The Kinematics of the Circumgalactic Medium Surrounding z ∼ 2 Quasars [PDF]
The Astrophysical Journal, 2018 Abstract We examine the kinematics of the gas in the environments of galaxies hosting quasars at z ∼ 2. We employ 148 projected quasar pairs to study the circumgalactic gas of the foreground quasars in absorption. The sample selects foreground quasars with precise redshift measurements, using emission lines with precision ≲300 km s−1 and
Marie Wingyee Lau +2 more
openaire +2 more sources
Distant obscured quasars [PDF]
, 2006 This thesis presents a study of high-redshift obscured (type-2) quasars, selected at mid-infrared and radio wavelengths. This population had remained elusive, even to hard X-ray surveys, and in Chapter 2 I compare the selection of type-2 quasars in X-ray
Martínez-Sansigre, Alejo. +1 more
core +2 more sources
A Deep Chandra X-Ray Survey of a Luminous Quasar Sample at z ∼ 7
The Astrophysical JournalWe present new Chandra observations of seven luminous quasars at z > 6.5. Combined with archival Chandra observations of all other known quasars, they form nearly complete X-ray observations of all currently known z ∼ 7 quasars with M _1450 < –26.5 ...
Xiangyu Jin +13 more
doaj +1 more source
Highly Accreting Quasars at High Redshift
Frontiers in Astronomy and Space Sciences, 2018 We present preliminary results of a spectroscopic analysis for a sample of type 1 highly accreting quasars (L/LEdd ~ 1.0) at high redshift, z ~2–3.
Mary L. Martínez-Aldama +7 more
doaj +1 more source
Scandinavian Journal of Medicine &Science in Sports, Volume 36, Issue 8, August 2026.ABSTRACT Cross‐sectional studies have indicated impaired neuromuscular and cortical activities following anterior cruciate ligament (ACL) reconstruction. However, adaptations throughout the recovery process remain unclear. Therefore, this study aimed to examine neuromuscular and cortical activity over the first year following ACL reconstruction.
Aglaja Busch, Frank Mayer, Heiner Baur
wiley +1 more source
ISO Observations of Quasars and Quasar Hosts [PDF]
, 1997 The Infrared Space Observatory (ISO), launched in November 1995, allows us to measure the far-infrared (far-IR) emission of quasars in greater detail and over a wider energy range than previously possible. In this paper, preliminary results in a study of the 5--200 $μm$ continuum of quasars and active galaxies are presented.
openaire +2 more sources
Quasar microlensing models with constraints on the Quasar light curves [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 Quasar microlensing analyses implicitly generate a model of the variability of the source quasar. The implied source variability may be unrealistic yet its likelihood is generally not evaluated. We used the damped random walk (DRW) model for quasar variability to evaluate the likelihood of the source variability and applied the revised algorithm to a ...
S. S. Tie, C. S. Kochanek
openaire +2 more sources
The compact structure of radio-loud broad absorption line quasars
, 2008 We present the results of EVN+MERLIN very long baseline interferometry (VLBI) polarization observations of eight broad absorption line (BAL) quasars at 1.6 GHz, including four low-ionization BAL quasars (LoBALs) and four high-ionization BAL quasars ...
Xie, F. G. +3 more
core +1 more source
The Astrophysical JournalThe search for dual supermassive black holes (SMBHs) is of immense interest in modern astrophysics. Galaxy mergers may fuel and produce SMBH pairs. Actively accreting SMBH pairs are observed as dual quasars, which are vital probes of SMBH growth.
Yuzo Ishikawa +12 more
doaj +1 more source
FEBS Open Bio, Volume 16, Issue 7, Page 1259-1270, July 2026.In this study, we developed a deep learning method for mitotic figure counting in H&E‐stained whole‐slide images and evaluated its prognostic impact in 13 external validation cohorts from seven different cancer types. Patients with more mitotic figures per mm2 had significantly worse patient outcome in all the studied cancer types except colorectal ...
Joakim Kalsnes +32 more
wiley +1 more source