Results 41 to 50 of about 37,338 (51)

The AO327 Drift Survey Catalog and Data Release of Pulsar Detections

open access: yesThe Astrophysical Journal Supplement Series
The AO327 drift survey for radio pulsars and transients used the Arecibo telescope from 2010 until its collapse in 2020. AO327 collected ∼3100 hr of data at 327 MHz with a time resolution of 82 μ s and a frequency resolution of 24 kHz.
J. S. Deneva   +7 more
doaj   +1 more source

The First LHAASO Catalog of Gamma-Ray Sources

open access: yesThe Astrophysical Journal Supplement Series
We present the first catalog of very-high-energy and ultra-high-energy gamma-ray sources detected by the Large High Altitude Air Shower Observatory. The catalog was compiled using 508 days of data collected by the Water Cherenkov Detector Array from 2021
Zhen Cao   +280 more
doaj   +1 more source

IRIS2+: A Comprehensive Database of Stratified Thermodynamic Models in the Low Solar Atmosphere

open access: yesThe Astrophysical Journal Supplement Series
We present the most comprehensive collection of stratified-in-optical-depth thermodynamic models of the lower solar atmosphere. This database, named IRIS ^2+ , consists of 40,320 synthetic representative profiles (RPs) and their corresponding ...
Alberto Sainz Dalda   +3 more
doaj   +1 more source

Revealing the Impact of Critical Stellar Central Density on Galaxy Quenching through Cosmic Time

open access: yesThe Astrophysical Journal
In a previous work, we investigated the structural and environmental dependence on quenching in the nearby universe. In this work, we extend our investigations to higher redshifts by combining galaxies from the Sloan Digital Sky Survey and The FourStar ...
Bingxiao Xu, Yingjie Peng
doaj   +1 more source

The 2022 Outburst of IGR J17091–3624: Connecting the Exotic GRS 1915+105 to Standard Black Hole X-Ray Binaries

open access: yesThe Astrophysical Journal
While the standard X-ray variability of black hole X-ray binaries (BHXBs) is stochastic and noisy, there are two known BHXBs that exhibit exotic “heartbeat”-like variability in their lightcurves: GRS 1915+105 and IGR J17091–3624. In 2022, IGR J17091–3624
Jingyi Wang   +15 more
doaj   +1 more source

Effects of Nonzero-frequency Fluctuations on Turbulence Spectral Observations

open access: yesThe Astrophysical Journal Letters
In situ observations of turbulence spectra in space plasmas are usually interpreted as wavenumber spectra, assuming that the fluctuation frequency is negligible in the plasma flow frame.
L.-L. Zhao, G. P. Zank, H. Li
doaj   +1 more source

Follow-up on the Supermassive Black Hole Binary Candidate J1048+7143: Successful Prediction of the Next Gamma-Ray Flare and Refined Binary Parameters in the Framework of the Jet Precession Model

open access: yesThe Astrophysical Journal Letters
Analyzing single-dish and very long baseline interferometry radio, as well as Fermi Large Area Telescope γ -ray observations, we explained the three major flares in the γ -ray light curve of FSRQ J1048+7143 with the spin–orbit precession of the dominant ...
Emma Kun   +8 more
doaj   +1 more source

The Jet and Resolved Features of the Central Supermassive Black Hole of M87 Observed with EHT in 2017—Comparison with the GMVA 86 GHz Results

open access: yesThe Astrophysical Journal Letters
M87 is the best target for studying black hole accretion and jet formation. Reanalysis of the Event Horizon Telescope (EHT) public data at 230 GHz shows a core–knots structure at the center and jet features.
Makoto Miyoshi   +3 more
doaj   +1 more source

Collisional Shaping of Nuclear Star Cluster Density Profiles

open access: yesThe Astrophysical Journal Letters
A supermassive black hole surrounded by a dense, nuclear star cluster resides at the center of many galaxies. In this dense environment, high-velocity collisions frequently occur between stars.
Sanaea C. Rose, Morgan MacLeod
doaj   +1 more source

Investigating the Impact of Atomic Data Uncertainties on the Measured Physical Parameters of the Perseus Galaxy Cluster

open access: yesThe Astrophysical Journal
Accurate atomic data and plasma models are essential for interpreting the upcoming high-quality spectra from missions like XRISM and Athena. Estimating physical quantities, like temperature, abundance, turbulence, and the resonance scattering factor, is ...
Priyanka Chakraborty   +6 more
doaj   +1 more source

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