Results 81 to 90 of about 10,243 (231)
Secondary evolution of galaxies investigated by N-body simulations [PDF]
, 2008 In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
core
The Pointing Error Due To Laser Propagation in Space Plasma for TianQin Gravitational Wave Detection
Space Weather, Volume 24, Issue 4, April 2026.Abstract TianQin, a space‐borne gravitational wave observatory, is designed to detect gravitational‐wave signals via laser interferometry. As the inhomogeneous space plasma surrounds the inter‐satellite laser links, the propagation of the laser in space plasma can introduce pointing error noise.
Shenwei Zhou +4 more
wiley +1 more source
The Disruption of the Sagittarius Dwarf Galaxy [PDF]
The Astrophysical Journal, 1995 Numerical simulations of dwarf spheroidal galaxies undergoing several close encounters with the Milky Way are described. By comparing our models to observed properties of the recently discovered dwarf galaxy in Sagittarius (Sgr), we discuss implications of our results for the formation and evolution of the Milky Way system.
Johnston, Kathryn V. +2 more
openaire +2 more sources
Stellar streams around dwarf galaxies in the local Universe
Astronomy & AstrophysicsContext. While mergers between massive galaxies and their dwarf satellites have been well studied, the properties of dwarf–dwarf satellite mergers are not well constrained.
Sakowska Joanna D. +8 more
doaj +1 more source
Overmassive Black Holes in Dwarf Galaxies Out to z ∼ 0.9 in the VIPERS Survey
The Astrophysical Journal Letters, 2023 Supermassive black holes (SMBHs) are thought to originate from early universe seed black holes of mass M _BH ∼ 10 ^2 –10 ^5 M _⊙ and grown through cosmic time. Such seeds could be powering the active galactic nuclei (AGN) found in today’s dwarf galaxies.
Mar Mezcua +5 more
doaj +1 more source
Astronomische Nachrichten, Volume 347, Issue 3, March 2026.ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik +12 more
wiley +1 more source
Molecular hydrogen in galaxies [PDF]
, 1987 This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be ...
Wilkinson, David Adam, Wilkinson, D.A
core
The morphological mix of dwarf galaxies in the nearby Universe [PDF]
We use a complete, unbiased sample of 257 dwarf (10) galaxies at z < 0.08, in the COSMOS field, to study the morphological mix of the dwarf population in low-density environments.
Kaviraj, S. +11 more
core +2 more sources
The Astrophysical JournalWe present a detailed study of radio-detected dwarf galaxies ( M _⋆ ≲ 3 × 10 ^9 M _⊙ ) to characterize extreme star formation and search for (variable) radio active galactic nuclei (AGNs). Our sample comes from A. E.
John-Michael Eberhard, Amy E. Reines
doaj +1 more source
The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements
Space Weather, Volume 24, Issue 3, March 2026.Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang +4 more
wiley +1 more source