Results 1 to 10 of about 108,957 (118)

Application of a Low-dissipation HLLD Approximate Riemann Solver to Solar Wind Simulations

The Astrophysical Journal
We investigate the steady-state solar wind in spherical coordinates using a low-dissipation Harten–Lax–van Leer-Discontinuities Riemann solver, in which the magnetic field is decomposed into an initial potential field B _0 and a time-dependent part B _1 .
Caixia Li, Zhenning Shen, Man Zhang, Xueshang Feng   +3 more
doaj   +1 more source

HDO Ice Detected toward an Isolated Low-mass Protostar with JWST

The Astrophysical Journal Letters
Water is detected in environments representing every stage of star and solar system formation, but its chemical evolution throughout these stages remains poorly constrained.
Katerina Slavicinska, Łukasz Tychoniec, María Gabriela Navarro, Ewine F. van Dishoeck, John J. Tobin, Martijn L. van Gelder, Yuan Chen, A. C. Adwin Boogert, W. Blake Drechsler, Henrik Beuther, Alessio Caratti o Garatti, S. Thomas Megeath, Pamela Klaassen, Leslie W. Looney, Patrick J. Kavanagh, Nashanty G. C. Brunken, Patrick Sheehan, William J. Fischer   +17 more
doaj   +1 more source

Unveiling the Cosmic Chemistry. II. “Direct” Te-based Metallicity of Galaxies at 3 < z < 10 with JWST/NIRSpec

The Astrophysical Journal
We report the detection of the [O iii ] auroral line in 42 galaxies within the redshift range of 3 < z < 10. These galaxies were selected from publicly available JWST data releases, including the JADES and PRIMAL surveys, and observed using both the low ...
Priyanka Chakraborty, Arnab Sarkar, Randall Smith, Gary J. Ferland, Michael McDonald, William Forman, Mark Vogelsberger, Paul Torrey, Alex M. Garcia, Mark Bautz, Adam Foster, Eric Miller, Catherine Grant   +12 more
doaj   +1 more source

Element Nucleosynthetic Origins from Abundance Spatial Distributions beyond the Milky Way

The Astrophysical Journal Letters
An element’s astrophysical origin should be reflected in the spatial distribution of its abundance, yielding measurably different spatial distributions for elements with different nucleosynthetic sites.
Zefeng Li, Mark R. Krumholz, Anna F. McLeod, A. Mark Swinbank, Emily Wisnioski, J. Trevor Mendel, Francesco Belfiore, Giovanni Cresci, Giacomo Venturi, Jia-Lai Kang   +9 more
doaj   +1 more source

Investigating Bidirectional Flows in a Quiescent Prominence Using MAST Ca II 8542 Å Line Scan Observations

The Astrophysical Journal
Quiescent prominences are large magnetic structures hosting cool plasma in surrounding million-degree solar coronae. Prominences host different flows that may distort magnetic field lines, which may lead to magnetic reconnection inside the prominence ...
Sandeep K. Dubey, Andrew Hillier, Shibu K. Mathew   +2 more
doaj   +1 more source

Comparing Observed Properties of Winds in Low-luminosity Active Galactic Nuclei with Theoretical Predictions

The Astrophysical Journal
Theoretical and numerical simulations of black hole hot accretion flows have shown the ubiquitous existence of winds and predicted their properties, such as velocity and mass flux.
Fangzheng Shi, Feng Yuan, Francesco Tombesi, Fu-guo Xie   +3 more
doaj   +1 more source

The XMAGNET Exascale MHD Simulations of SMBH Feedback in Galaxy Groups and Clusters: Overview and Preliminary Cluster Results

The Astrophysical Journal
We present initial results from extremely well-resolved 3D magnetohydrodynamical simulations of idealized galaxy clusters, conducted using the AthenaPK code on the Frontier exascale supercomputer.
Philipp Grete, Brian W. O’Shea, Forrest W. Glines, Deovrat Prasad, Benjamin D. Wibking, Martin Fournier, Marcus Brüggen, G. Mark Voit   +7 more
doaj   +1 more source

Constraining Resolved Extragalactic R21 Variation with Well-calibrated ALMA Observations

The Astrophysical Journal
CO(1–0) and CO(2–1) are commonly used as bulk molecular gas tracers. The CO line ratios (especially CO(2–1)/CO(1–0)– R _21 ) vary within and among galaxies, yet previous studies on R _21 and alike often rely on measurements constructed by combining data ...
Jakob den Brok, Elias K. Oakes, Adam K. Leroy, Eric W. Koch, Antonio Usero, Erik W. Rosolowsky, Frank Bigiel, Jiayi Sun, Hao He, Ashley T. Barnes, Yixian Cao, Fu-Heng Liang, Hsi-An Pan, Toshiki Saito, Sumit K. Sarbadhicary, Thomas G. Williams   +15 more
doaj   +1 more source

The Chemical Yields of Stars in the Mass Range 9–15 M⊙

The Astrophysical Journal Supplement Series
In M. Limongi et al. we presented and discussed the main evolutionary properties and final fate of stars in the mass range 7−15 M _⊙ . The evolutions of those models were computed by means of a medium-sized nuclear network that guaranteed a proper ...
Marco Limongi, Lorenzo Roberti, Agnese Falla, Alessandro Chieffi, Ken’ichi Nomoto   +4 more
doaj   +1 more source

Pivot of the Emerging Bipolar Magnetic Region in the Birth of Sigmoidal Solar Active Regions

The Astrophysical Journal Letters
We present an augmentation to long-standing evidence from observations and MHD modeling that (1) every solar emerging bipolar magnetic region (BMR) is made by an emerging Ω-loop flux rope, and (2) a twist in the flux-rope field makes the emerged field ...
Ronald L. Moore, Sanjiv K. Tiwari, V. Aparna, Navdeep K. Panesar, Alphonse C. Sterling, Talwinder Singh   +5 more
doaj   +1 more source