Results 31 to 40 of about 1,488 (191)
Diffuse Gamma Rays Galactic and Extragalactic Diffuse Emission
, 2004 Diffuse gamma rays consist of several components: truly diffuse emission from the interstellar medium, the extragalactic background, whose origin is not firmly established yet, and the contribution from unresolved and faint Galactic point sources.
Strong, Andrew W. +5 more
core +1 more source
A Comparative Study of VTEC Estimates Derived From S/X VLBI and VGOS Observations
Space Weather, Volume 23, Issue 12, December 2025.Abstract The ionosphere, which strongly varies in time and space, is one of the largest error sources for microwave measurements, if not accounted for accurately. Especially for single‐frequency observations, precise ionospheric models are needed to correct for the ionospheric delays. This study explores the utility of Very Long Baseline Interferometry
Arno Rüegg +2 more
wiley +1 more source
New Observational Recipes for Measuring Dynamical States of Galaxy Clusters
The Astrophysical JournalDuring cluster assembly, a cluster’s virialization process leaves behind signatures that can provide information on its dynamical state. However, no clear consensus yet exists on the best way to achieve this.
Hyowon Kim +6 more
doaj +1 more source
The location and kinematics of the emission line regions in Active Galactic Nuclei [PDF]
, 2008 This thesis contains the results from a study of the optical emission lines of various samples of active galactic nuclei (AGN). We have used three separate techniques to determine the precise kinematics and the relative location of the emission line ...
Mullaney, J R, Mullaney, J.R.
core
The High-Velocity Clouds: Galactic or Extragalactic?
, 1998 We present firm evidence that one of the major high velocity clouds (HVCs), Complex A, lies in the Milky Way Halo, at a vertical distance z = 3 - 7 kpc from the Galactic plane. For clouds MII/MIII, Danly et al. and Keenan et al. had already found z
Peletier, R. F. +4 more
core +1 more source
HEAD IN THE STARS, FEET ON THE GROUND: Scale and Astronomy Initiatives in Southern Africa
Cultural Anthropology, Volume 40, Issue 4, Page 571-596, November 2025.ABSTRACT This article explores the evolution of radio astronomy in South Africa and Madagascar, focusing on how “scale” functions as both a way of understanding the world and marking differences in existence. In outer space research, the ground is crucial but often overlooked.
HANNA NIEBER, DAVIDE CHINIGÒ
wiley +1 more source
Comparing Inside-out and Outside-in Quenching Modes in MaNGA Observation and MaNGIA Simulation
The Astrophysical JournalThis study probes the inside-out and outside-in quenching status of galaxies to understand the internal and external quenching sources responsible and their roles in galaxy evolution.
Hung-Yu Jian +7 more
doaj +1 more source
The Mauritius radio telescope and a study of selected super nova remnants associated with pulsars [PDF]
, 1997 The just completed Mauritius Radio Telescope, a 2km by 1km T shaped synthesis array designed to repeat the 6C survey but for the Southern hemisphere, is described. Full details of the instrument hardware, and the software designed to interpret the output
Dodson, R.G., Dodson, R.
core
Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade
Radio Science, Volume 60, Issue 7, July 2025.Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park +13 more
wiley +1 more source
The Astrophysical JournalThe North Polar Spur (NPS) is a prominent diffuse X-ray feature whose origin has remained uncertain for decades. Using a uniform analysis of archival Suzaku and XMM-Newton data with new Chandra observations, we constrain its thermal and chemical ...
Anjali Gupta +7 more
doaj +1 more source