Results 1 to 10 of about 107,651 (118)

Triggered Emissions of Kinetic Alfvén Waves and Parallel Ion Cyclotron Waves by Ion Beam Mode in the Solar Wind

The Astrophysical Journal
Kinetic Alfvén waves (KAWs) and ion cyclotron waves (ICWs) are believed to play a significant role in the solar wind heating and acceleration and are pervasive in space and astrophysical plasmas.
L. Xiang, K. H. Lee, L. C. Lee, D. J. Wu, L. Chen, H. Q. Feng, G. Q. Zhao, T. C. Tsai   +7 more
doaj   +1 more source

Constraining the Presence of Companion Planets in Hot Jupiter Planetary Systems Using Transit-timing Variation Observations from TESS

The Astrophysical Journal Supplement Series
The presence of another planetary companion in a transiting exoplanet system can impact its transit light curve, leading to sinusoidal transit-timing variations (TTV).
Zixin Zhang, Wenqin Wang, Xinyue Ma, Zhangliang Chen, Yonghao Wang, Cong Yu, Shangfei Liu, Yang Gao, Baitian Tang, Bo Ma   +9 more
doaj   +1 more source

Probing the Extended Atmospheres of AGB Stars. I. Synthetic Imaging of 1D Hydrodynamical Models at Radio and (Sub-)millimeter Wavelengths

The Astrophysical Journal
We investigate the observable characteristics of the extended atmospheres of asymptotic giant branch (AGB) stars across a wide range of radio and (sub-)millimeter wavelengths using state-of-the-art 1D dynamical atmosphere and wind models over one ...
Behzad Bojnordi Arbab, Wouter Vlemmings, Theo Khouri, Susanne Höfner   +3 more
doaj   +1 more source

Simulating Radio Synchrotron Morphology, Spectra, and Polarization of Cosmic Ray Driven Galactic Winds

The Astrophysical Journal
The formation of galaxies is significantly influenced by galactic winds, possibly driven by cosmic rays due to their long cooling times and better coupling to plasma compared to radiation.
H.-H. Sandy Chiu, Mateusz Ruszkowski, Timon Thomas, Maria Werhahn, Christoph Pfrommer   +4 more
doaj   +1 more source

Updated Cosmological Constraints in Extended Parameter Space with Planck PR4, DESI Baryon Acoustic Oscillations, and Supernovae: Dynamical Dark Energy, Neutrino Masses, Lensing Anomaly, and the Hubble Tension

The Astrophysical Journal Letters
We present updated constraints on cosmological parameters in a 12-parameter model, extending the standard six-parameter ΛCDM by including dynamical dark energy (DE ; w _0 , w _a ), the sum of neutrino masses (∑ m _ν ), the effective number of non-photon ...
Shouvik Roy Choudhury, Teppei Okumura
doaj   +1 more source

KBSS-InCLOSE. I. Design and First Results from the Inner Circumgalactic Medium of QSO Line-of-sight Emitting Galaxies at z ∼ 2–3

The Astrophysical Journal
We present the design and first results of the inner circumgalactic medium (CGM) of QSO line-of-sight emitting galaxies at z ∼ 2–3, Keck Baryonic Structure Survey (KBSS)-InCLOSE.
Evan Haze Nuñez, Charles C. Steidel, Evan N. Kirby, Gwen C. Rudie, Nikolaus Z. Prusinski, Yuguang Chen, Zhuyun Zhuang, Allison L. Strom, Dawn K. Erb, Max Pettini, Louise Welsh, David S. N. Rupke, Ryan J. Cooke   +12 more
doaj   +1 more source

The Effect of Anisotropic Energy Injection on the Ejecta Emission

The Astrophysical Journal
A rapidly rotating magnetar has long been assumed to inject energy into the ejecta through isotropic output energy in previous works. However, the output energy of a magnetar is anisotropic and a jet is generally presented in the rotational direction of ...
Yu-Fei Li, Da-Bin Lin, Li Zhou, Jia Ren, Zhi-Lin Chen, En-Wei Liang   +5 more
doaj   +1 more source

Study of Evolution and Geo-effectiveness of Coronal Mass Ejection–Coronal Mass Ejection Interactions Using Magnetohydrodynamic Simulations with SWASTi Framework

The Astrophysical Journal
The geo-effectiveness of coronal mass ejections (CMEs) is a critical area of study in space weather, particularly in the lesser-explored domain of CME–CME interactions and their geomagnetic consequences.
Prateek Mayank, Stefan Lotz, Bhargav Vaidya, Wageesh Mishra, D. Chakrabarty   +4 more
doaj   +1 more source

A Hierarchical Bayesian Approach to Point-source Analysis in High-energy Neutrino Telescopes

The Astrophysical Journal
We propose a novel approach to the detection of point-like sources of high-energy neutrinos. Motivated by evidence for emerging sources in existing data, we focus on the characterization and interpretation of these sources rather than the rejection of ...
Francesca Capel, Julian Kuhlmann, Christian Haack, Martin Ha Minh, Hans Niederhausen, Lisa Schumacher   +5 more
doaj   +1 more source

The Oscillation in Evolution of Changing-look Blazar OQ 334

The Astrophysical Journal
We 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, R. X. Zhou, Y. G. Zheng, S. J. Kang   +3 more
doaj   +1 more source