Results 61 to 70 of about 282 (177)
Soft X‐Ray Properties of Flat‐Spectrum Radio Quasars [PDF]
The Astrophysical Journal, 1997 We report the soft X-ray properties of 41 flat-spectrum radio quasars (FSRQs), derived by cross-correlating literature blazar samples with the ROSAT PSPC archive of pointed observations. The redshifts of the sources span the range z = 0-3. The 0.1-2.4 keV spectra of FSRQs are well described by a single power law modified by column densities of neutral ...
openaire +1 more source
Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.ABSTRACT The discovery of radio‐quiet, x‐ray thermally emitting isolated neutron stars (XINSs) in the ROSAT All‐Sky Survey revealed a previously overlooked component of the neutron star population. Advancements in x‐ray instrumentation and the availability of deep, wide‐area optical surveys now enable us to explore XINSs at fainter x‐ray fluxes and ...
Adriana Mancini Pires +11 more
wiley +1 more source
Discerning Misclassified Flat-spectrum Radio Quasars from Low-frequency-peaked BL Lacertae Objects
The Astrophysical Journal Supplement SeriesA sample of 312 low-frequency-peaked BL Lacertae objects (LBLs) and 694 flat-spectrum radio quasars (FSRQs) with the parameters of both redshift and gamma-ray photon spectral index (Γ _γ ) is compiled from the Fourth Catalog of Active Galactic Nuclei ...
S. Liang +3 more
doaj +1 more source
Neural interfaces: Bridging the brain to the world beyond healthcare
Exploration, Volume 4, Issue 5, October 2024.This perspective explores diverse neural interfaces in the brain, offering transformative possibilities for engaging with our environment and enhancing communication. Emphasis is placed on the role of both non‐invasive and invasive neural interfaces in transforming practical applications beyond the realm of healthcare, emphasizing the promising ...
Shumao Xu +3 more
wiley +1 more source
Unraveling the Variation Mechanism of CTA 102: A Combined Spectral and Polarization Investigation
The Astrophysical JournalThe variation mechanism of blazars has been a longstanding question. As a target exhibiting extreme variability, CTA 102 offers a unique window into this puzzle.
Chen-Li Ma, Jun-Hao Deng, Yun-Guo Jiang
doaj +1 more source
The Astrophysical JournalBlazars are active galactic nuclei known for their extreme variability, offering unique opportunities to study jet physics and high-energy emission mechanisms.
TianFang Zhang +21 more
doaj +1 more source
B2 1308+326: A Changing-look Blazar or Not?
The Astrophysical JournalIn our previous study, we identified a shift in the synchrotron peak frequency of the blazar B2 1308+326 from 10 ^12.9 to 10 ^14.8 Hz during a flare, suggesting it could be a changing-look blazar (CLB).
Ashwani Pandey +8 more
doaj +1 more source
Characterizing the Emission Region Properties of Blazars
The Astrophysical Journal Supplement Series, 2023 Studies and constraints on the emission region are crucial to the blazar radiation mechanism. Yet previous works have mainly focused on individual sources.
Junhui Fan +6 more
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Scandinavian Journal of Medicine &Science in Sports, Volume 34, Issue 8, August 2024.ABSTRACT With expertise, athletes develop motor strategies that enhance sports performance or reduce functional costs. Motor variability is known as a relevant way to characterize these strategies in athletes with different levels of expertise. The aim of this scoping review is to gather and discuss the latest advances in the impact of expertise on ...
Emile Marineau +5 more
wiley +1 more source
The Oscillation in Evolution of Changing-look Blazar OQ 334
The Astrophysical JournalWe investigate the evolution of a changing-look blazar (CLB) on long timescales and expect to trace the state change of a CLB. Three morphological types, including a flat spectrum radio quasar (FSRQ) state, transition state, and BL Lacertae (BL Lac ...
S. S. Ren +3 more
doaj +1 more source