Results 51 to 60 of about 1,317 (190)
, 1994 We present spectra of QSOs 1343+266 A B, covering Ly-beta to C~IV emission at 2 ~resolution, and find further evidence that this system is not gravitationally lensed. We see, however, a large number of Ly-alpha and some C~IV absorption features common to both spectra.
Crotts, Arlin P. S. +3 more
openaire +2 more sources
Journal of Chemometrics, Volume 39, Issue 12, December 2025.ABSTRACT The COVID‐19 pandemic has highlighted the urgent need for rapid, accurate, and cost‐effective diagnostic alternatives to conventional methods such as RT‐qPCR and immunoassays. In this study, we explored the potential of vibrational spectroscopy, specifically near‐infrared (NIR) and mid‐infrared (MID) spectroscopy, for detecting SARS‐CoV‐2 ...
Fernanda F. S. Oliveira +7 more
wiley +1 more source
High-Resolution Absorption Spectroscopy of Multiphase, High-Metallicity Gas Associated with the Luminous Quasar HE 0226–4110 [PDF]
, 2006 We present FUSE and HST STIS observations of the absorption-line system near the emission redshift of the radio-quiet, X-ray-bright quasar HE 0226-4110 (z = 0.495, V = 15.2).
R. Ganguly +4 more
semanticscholar +1 more source
The Astrophysical JournalQuasar outflows often consist of two clouds with velocity separations matching the doublet spacings of common UV resonance transitions, a phenomenon known as line locking, which is commonly observed in quasar spectra.
Chen Chen +5 more
doaj +1 more source
Chemistry–Methods, Volume 5, Issue 12, November 2025.LaB6 surface modification of PA12 enables efficient NIR diode laser PBF‐LB processing, with enhanced tensile strength and tailored microstructures achieved at minimal additionaly energy. By reducing the need for high filler content, this approach expands the options and performance levels of advanced industrial‐grade polymer additive manufacturing. The
Nadine Stratmann +8 more
wiley +1 more source
Long Dark Gaps in the Lyβ Forest at z < 6: Evidence of Ultra-late Reionization from XQR-30 Spectra
The Astrophysical Journal, 2022 We present a new investigation of the intergalactic medium near reionization using dark gaps in the Ly β forest. With its lower optical depth, Ly β offers a potentially more sensitive probe to any remaining neutral gas compared to the commonly used Ly α ...
Yongda Zhu +24 more
doaj +1 more source
3D SR‐μXCT analysis for lithology detection: Application to Ryugu sample A0159
Meteoritics &Planetary Science, Volume 60, Issue 11, Page 2623-2654, November 2025.Abstract Extraterrestrial breccia samples are formed through impact‐related processes that combine the fragments of distinct lithologies. As such, they are valuable indicators of the complex formation and evolution history of planetesimals in our solar system.
Léna Jossé +9 more
wiley +1 more source
THE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT: RAPID C iv BROAD ABSORPTION LINE VARIABILITY [PDF]
, 2015 We report the discovery of rapid variations of a high-velocity C iv broad absorption line trough in the quasar SDSS J141007.74+541203.3. This object was intensively observed in 2014 as a part of the Sloan Digital Sky Survey Reverberation Mapping Project,
C. Grier +26 more
semanticscholar +1 more source
AGN Feedback Efficiency of Narrow Absorption Line Quasars
The Astrophysical JournalWe consider if outflowing winds that are detected via narrow absorption lines (NALs) with FWHM of
Toru Misawa +2 more
doaj +1 more source
The Astrophysical Journal, 2023 We present the first result in exploring the gaseous halo and galaxy correlation using the Dark Energy Spectroscopic Instrument survey validation data in the Cosmic Evolution Survey (COSMOS) and Hyper Suprime-Cam field.
Siwei Zou +25 more
doaj +1 more source