Results 31 to 40 of about 3,113 (292)

Spectral Templates Optimal for Selecting Galaxies at z > 8 with the JWST

open access: yesThe Astrophysical Journal, 2023
The selection of high-redshift galaxies often involves spectral energy distribution (SED) fitting to photometric data, an expectation for contamination levels, and measurement of sample completeness—all vetted through comparison to spectroscopic redshift
Rebecca L. Larson   +11 more
doaj   +1 more source

Photometric Accuracy of Deconvolved Simulated Astronomical Images

open access: yesThe Astrophysical Journal, 2005
A study of the photometric accuracy of deconvolved astronomical images was undertaken by processing two simulated images with several well-known algorithms. The simulations consisted of an image of a simple star field and an image of an active galactic nucleus (AGN).
Stephen R. McNeil, J. Ward Moody
openaire   +1 more source

Kinematic Evidence of an Embedded Protoplanet in HD 142666 Identified by Machine Learning

open access: yesThe Astrophysical Journal, 2023
Observations of protoplanetary disks have shown that forming exoplanets leave characteristic imprints on the gas and dust of the disk. In the gas, these forming exoplanets cause deviations from Keplerian motion, which can be detected through molecular ...
J. P. Terry   +3 more
doaj   +1 more source

Halted-pendulum Relaxation: Application to White Dwarf Binary Initial Data

open access: yesThe Astrophysical Journal, 2023
Studying compact-star binaries and their mergers is integral to determining progenitors for observable transients. Today, compact-star mergers are typically studied via state-of-the-art computational fluid dynamics codes.
M. Alexander R. Kaltenborn   +4 more
doaj   +1 more source

General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests

open access: yesThe Astrophysical Journal Supplement Series, 2023
We present the implementation of a two-moment-based general-relativistic multigroup radiation transport module in the G eneral-relativistic mu ltigrid nu merical ( Gmunu ) code.
Patrick Chi-Kit Cheong   +3 more
doaj   +1 more source

CMR Exploration. I. Filament Structure with Synthetic Observations

open access: yesThe Astrophysical Journal Supplement Series, 2023
In this paper, we carry out a pilot parameter exploration for the collision-induced magnetic reconnection (CMR) mechanism that forms filamentary molecular clouds.
Shuo Kong   +4 more
doaj   +1 more source

Constraints on the Epoch of Reionization with Roman Space Telescope and the Void Probability Function of Lyα Emitters

open access: yesThe Astrophysical Journal, 2023
We use large simulations of Ly α emitters with different fractions of ionized intergalactic medium to quantify the clustering of Ly α emitters as measured by the void probability function (VPF), and how it evolves under different ionization scenarios. We
Lucia A. Perez   +3 more
doaj   +1 more source

VLBI Network SIMulator: An Integrated Simulation Tool for Radio Astronomers

open access: yes, 2018
In this paper we introduce a software package, the Very Long Baseline Interferometry Network SIMulator (VNSIM), which provides an integrated platform assisting radio astronomers to design the Very Long Baseline Interferometry (VLBI) experiments and evaluate the network performance with a user-friendly interface. Though VNSIM is motivated to be designed
Zhao, Zhen, An, Tao, Lao, Baoqiang
openaire   +2 more sources

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