Results 21 to 30 of about 2,413,471 (156)
A simple model for explaining Galaxy Rotation Curves [PDF]
Galaxies 2018, 6(3), 70, 2018 A new simple expression for the circular velocity of spiral galaxies is proposed and tested against HI Nearby Galaxy Survey (THINGS) data set. Its accuracy is compared with the one coming from MOND.
arxiv +1 more source
, 2000 Supernovae play a critical role in observational cosmology as well as in astrophysics of stars and galaxies. Recent era has seen dramatic progress in the research of supernovae.
Lee, Myung Gyoon
core +3 more sources
Galaxy Classification: A machine learning approach for classifying shapes using numerical data [PDF]
arXiv, 2023 The classification of galaxies as spirals or ellipticals is a crucial task in understanding their formation and evolution. With the arrival of large-scale astronomical surveys, such as the Sloan Digital Sky Survey (SDSS), astronomers now have access to images of a vast number of galaxies.
arxiv
Spiral galaxies with large optical warps [PDF]
, 1999 As a result of our statistical study of 540 edge-on galaxies, we present here the images and preliminary statistical analysis of a sub-sample of 60 galaxies, that were selected to be S-type warped spirals.
Combes, Francoise, Reshetnikov, Vladimir
core +1 more source
Antiprotons from dark matter annihilation in the Galaxy: Astrophysical uncertainties [PDF]
Physical Review D, 2012 The latest years have seen steady progresses in WIMP dark matter (DM) searches, with hints of possible signals suggested by both direct and indirect detection experiments. Antiprotons can play a key role validating those interpretations since they are copiously produced by WIMP annihilations in the Galactic halo, and the secondary antiproton background
Luca Maccione +5 more
openaire +6 more sources
Global HI profiles of spiral galaxies [PDF]
, 1995 In this paper we present short HI synthesis observations of 57 galaxies without HI information in the RC3. These are a by-product of a large survey with the WSRT of the neutral hydrogen gas in spiral and irregular galaxies.
Kamphuis, J. J. +2 more
core +5 more sources
Baryonic Tully-Fisher test of Grumiller's modified gravity model [PDF]
, 2021 We test the Grumiller's quantum motivated modified gravity model, which at large distances modifies the Newtonian potential and describes the galactic rotation curves of disk galaxies in terms of a Rindler acceleration term without the need of any dark matter, against the baryonic Tully-Fisher feature that relates the total baryonic mass of a galaxy ...
arxiv +1 more source
Observations, Simulations, and Reasoning in Astrophysics [PDF]
, 2020 Astrophysics faces methodological challenges as a result of being a predominantly observation-based science without access to traditional experiments. In light of these challenges, astrophysicists frequently rely on computer simulations.
Jacquart, Melissa
core +2 more sources
Clustering of Galaxies in Brane World Models [PDF]
Gen.Rel.Grav. 48 (2016) no.4, 47, 2015 In this paper, we analyze the clustering of galaxies using a modified Newtonian potential. This modification of the Newtonian potential occurs due to the existence of extra dimensions in brane world models. We will analyze a system of galaxies interacting with each other through this modified Newtonian potential.
arxiv +1 more source
ASTROPHYSICAL FRACTALS: INTERSTELLAR MEDIUM AND GALAXIES [PDF]
, 2000 The interstellar medium is structured as a hierachy of gas clouds, that looks self-similar over 6 orders of magnitude in scales and 9 in masses. This is one of the more extended fractal in the Universe. At even larger scales, the ensemble of galaxies looks also self-similar over a certain ranges of scales, but more limited, may be over 3-4 orders of ...
openaire +3 more sources