Results 131 to 140 of about 695,772 (397)
Open Astronomy, 2018 The properties of unstable large-scale hydrodynamic (HD) modes of oscillations in the gaseous disk of a flat galaxy with a rotation curve having a velocity jump in the inner region of the disk are numerically investigated.
Torgashin Yury, Omurkanov Turgunbek
doaj +1 more source
How do galaxies get their gas [PDF]
, 2002 Not the way one might have thought. In hydrodynamic simulations of galaxy formation, some gas follows the traditionally envisioned route, shock heating to the halo virial temperature before cooling to the much lower temperature of the neutral ISM.
N. Katz +3 more
semanticscholar +1 more source
Advanced Intelligent Systems, EarlyView.This article proposes a lightweight YOLOv4‐based detection model using MobileNetV3 or CSPDarknet53_tiny, achieving 30+ FPS and higher mAP. It also presents a ShuffleNet‐based classification model with transfer learning and GAN‐augmented images, improving generalization and accuracy.
Qingyang Liu, Yanrong Hu, Hongjiu Liu
wiley +1 more source
Galaxy Zoo: morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey [PDF]
, 2008 In order to understand the formation and subsequent evolution of galaxies one must first distinguish between the two main morphological classes of massive systems: spirals and early-type systems.
C. Lintott +11 more
semanticscholar +1 more source
Photometric Properties of Six Local Volume Dwarf Galaxies from Deep Near-Infrared Observations [PDF]
, 2010 We have obtained deep near-infrared $J$- (1.25 $\mu$m), $H$- (1.65$ \mu$m) and $K_s$-band (2.15 $\mu$m) imaging for a sample of six dwarf galaxies ($M_B\ga-17$ mag) in the Local Volume (LV, $D\la10$ Mpc).
Andreon +47 more
core +1 more source
Astronomische Nachrichten, EarlyView.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
Weighing Cosmological Models with SNe Ia and Gamma Ray Burst Redshift Data
Universe, 2019 Many models have been proposed to explain the intergalactic redshift using different observational data and different criteria for the goodness-of-fit of a model to the data. The purpose of this paper is to examine several suggested models using the same
Rajendra P. Gupta
doaj +1 more source
EMERGE – an empirical model for the formation of galaxies since z ∼ 10 [PDF]
, 2017 We present EMERGE, an Empirical ModEl for the foRmation of GalaxiEs, describing the evolution of individual galaxies in large volumes from z similar to 10 to the present day.
B. Moster, T. Naab, S. White
semanticscholar +1 more source
Symposium - International Astronomical Union, 1983 At the present time the previously used term “Peculiar galaxy” is gradually being replaced by the term “active” galaxy. This is quite natural, because the overwhelming majority of “peculiar” galaxies turned out to be “active” at the same time. The opposite is not correct: there are a lot of examples where a galaxy looking normal is physically active.
openaire +2 more sources
Super-star clusters versus OB associations
, 2010 Super Star Clusters (Mecl > 10^5 Msol) are the largest stellar nurseries in our local Universe, containing hundreds of thousands to millions of young stars within a few light years.
Adams +44 more
core +2 more sources