Results 121 to 130 of about 71,111 (245)
Tracing the Spiral Structure of the Outer Milky Way with Dense Atomic Hydrogen Gas
, 2017 We present a new face-on map of dense neutral atomic hydrogen (HI) gas in the outer Galaxy. Our map has been produced from the Leiden/Argentine/Bonn (LAB) HI 21-cm line all-sky survey by finding intensity maxima along every line of sight and then by ...
Balser, Dana S. +6 more
core +1 more source
Identification of Intermediate-mass Black Hole Candidates among a Sample of Sd Galaxies
The Astrophysical JournalWe analyzed images of every northern hemisphere Sd galaxy listed in the Third Reference Catalogue of Bright Galaxies with a relatively face-on inclination ( θ ≤ 30°). Specifically, we measured the spiral arms’ winding angle, ϕ , in 85 galaxies.
Benjamin L. Davis +6 more
doaj +1 more source
Study photometric properties of spiral galaxy NGC 4448 using CCD camera with multiband filters
Iraqi Journal of Physics, 2018 The goal of our study is to perform detailed multiband surface photometry of the spiral galaxy NGC 4448 and its brightest star-forming regions. The structure and composition of the stellar population in the surface brightness galaxy NGC 4448 was studied
Sinan H. Ali
doaj +1 more source
Photometric structure of the peculiar galaxy ESO 235-G58
, 2004 We present the near-infrared and optical properties of the peculiar galaxy ESO 235-G58, which resembles a late-type ringed barred spiral seen close to face-on.
Arnaboldi +47 more
core +1 more source
The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies
The Astrophysical JournalAs galaxies evolve over time, the orbits of their constituent stars are expected to change in size and shape, moving stars away from their birth radius. Radial gas flows are also expected. Spiral arms and bars in galaxies are predicted to help drive this
M. E. Wisz +4 more
doaj +1 more source
International Journal of Engineering and Management Sciences, 2018 Recently, it has been suggested that entangled particles may be connected by a wormhole. If that is right, what is the distance between them we have to take into account when applying Newton's law of universal gravitation to these particles?
Sándor Buglyó
doaj +1 more source
Spiral structure and the rotation of galaxies [PDF]
, 1958 B. A. Vorontsov-Vel'Yaminov
openalex +1 more source
Grand Design versus Multiarmed Spiral Galaxies: Dependence on Galaxy Structure
The Astronomical JournalWe developed an algorithm to use Galaxy Zoo 3D spiral arm masks produced by citizen scientist volunteers to semiautomatically classify spiral galaxies as either multiarmed or grand design spirals. Our final sample consists of 299 multiarmed and 245 grand
Beverly J. Smith +3 more
doaj +1 more source
A summary and assessment of current 21-cm results concerning spiral and disk structures in our galaxy [PDF]
, 1959 J. H. Oort
openalex +1 more source
Formation of Spiral Galaxies [PDF]
International Astronomical Union Colloquium, 1977 Conventionally, two major components of spiral galaxies are distinguished: (1) a “spheroidal component”, which includes the central bulge and the surrounding halo, and (2) a “disc component”, which is basically flat and circular but is often warped at the edges. Other structures, such as bars or rings, may also be present, but they are probably of less
openaire +2 more sources