Results 21 to 30 of about 44,112 (114)

The Role of Halo Substructure in Gamma-Ray Dark Matter Searches [PDF]

open access: yes, 2020
An important, open research topic today is to understand the relevance that dark matter halo substructure may have for dark matter searches. In the standard cosmological model, halo substructure or subhalos are predicted to be largely abundant inside ...
Sánchez-Conde, Miguel A., Doro, Michele
core   +1 more source

Orientale Basin as a Guide for Identifying Lunar Basin Datable Impact Melt and Assessing Impact Melt Differentiation

open access: yesThe Planetary Science Journal
Two fundamental questions face lunar scientists: (1) What is the absolute age of each lunar impact basin and thus the early impact flux curve? (2) To what degree did basin impact melt seas undergo differentiation? We compiled a 1:200,000-scale geological
Kirby Runyon   +7 more
doaj   +1 more source

Inertia Estimation of Spacecraft Based on Modified Law of Conservation of Angular Momentum [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
In general, the information of inertia properties is required to control a spacecraft. The inertia properties are changed by some activities such as consumption of propellant, deployment of solar panel, sloshing, etc.
Dong Hoon Kim, Dae-Gyun Choi, Hwa-Suk Oh
doaj   +1 more source

The isolation and purification of active compound resistance to Verticillium dahliae 991 (VD-991) from Bacillus subtilis Z15 (BS-Z15).

open access: yes, 2022
(A) Flow chart showing the isolation and purification steps with BS-Z15 fermentation broth (left), and the active compound from each step were monitored by disk antagonism test (right). S indicates supernatant and P indicates pellet.
Huixin Zhao (10022762)   +9 more
core   +1 more source

Generating X-Ray Transit Profiles with Batman

open access: yesThe Astronomical Journal
We present an adaptation of the exoplanet transit model code batman , in order to permit the generation of X-ray transits. Our underlying extended coronal model assumes an isothermal plasma that is radially symmetric.
George W. King   +4 more
doaj   +1 more source

Recent Progress in Understanding Solar Magnetic Reconnection [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2015
Magnetic reconnection is a fundamental process occurring in a wide range of astrophysical, heliospheric and laboratory plasmas. This process alters magnetic topology and triggers rapid conversion of magnetic energy into thermal heating and nonthermal ...
Jeongwoo Lee
doaj   +1 more source

Radio Galaxies at TeV Energies [PDF]

open access: yes, 2020
It is common believe that the centers of all galaxies exhibit supermassive black holes with masses ranging from millions up to billions of the mass of our Sun.
Glawion, Dorit
core   +1 more source

A Near-infrared Survey of Candidate Haumea Family Members

open access: yesThe Astronomical Journal
The Haumea family is the only known dynamical family in the trans-Neptunian region. To date, 10 family members have been unambiguously identified using near-infrared (NIR) spectral or photometric data in combination with their strong dynamical proximity ...
Benjamin C. N. Proudfoot   +7 more
doaj   +1 more source

Recent Progress in Understanding the Large Scale Jets of Powerful Quasars

open access: yesGalaxies, 2016
Our understanding of the physics of kpc-scale quasar jets had seemed to converge to a paradigm in which these jets are as highly relativistic on the kpc scale as they are on sub-pc scales close to the central black hole. Retaining bulk Lorentz factors (Γ)
Markos Georganopoulos   +2 more
doaj   +1 more source

A Analysis for Calibration Site Selection of SAR Satellite [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
CALVAL (Calibration & Validation) shall consider payloads characteristics because satellites have one and/or several payloads in order to perform their various missions.
Jung-Hoon Keum, Sung-Woong Ra
doaj   +1 more source

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