Results 151 to 160 of about 451,169 (273)

Some statistical properties of spiral galaxies

, 1999
This paper presents some statistical correlations of 72 northern spiral galaxies. The results show that early-type spirals that are brighter, and thicker, and the axis ratios (H-z/H-r) of the disk tend to be smaller along the Hubble sequence.
Peng, QH, Zhao, JL, Shu, CG, Ma, J
core  

The relationship between Gas and Galaxies [PDF]

, 2009
We have investigated the 2D 2-point correlation function, ƐAG, between low column density Lya absorbers and galaxies at a redshift z ~ 1 for the first time.
Shone, Allen Maurice
core  

Spin Parity of Spiral Galaxies. VI. A Search for Dynamical Memory in the Spin Distribution of Galaxies in HSC WIDE Survey Regions

The Astronomical Journal
We analyzed the distribution of spin parity in spiral galaxies using the HSC DR2 data. The spiral winding parity of disk galaxies, observed as S-spiral or Z-spiral projected onto the sky plane, provides robust information on the sign of the line-of-sight
Masanori Iye, Masafumi Yagi
doaj   +1 more source

The dynamics of molecular gas in nearby galaxies

, 2013
Includes abstract.
Frank, Bradley Stanton
core  

The star formation history of early-type galaxies in the fornax cluster [PDF]

, 1998
We have measured central line strengths and line-strength gradients for a complete sample of early-type galaxies in the Fornax cluster, comprising 11 elliptical and 11 lenticular galaxies, more luminous than M(_B) = -17.
Kuntschner, Harald, Kuntschner, H.
core  

The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies

The Astrophysical Journal
As 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, Karen L. Masters, Kathryne J. Daniel, David V. Stark, Francesco Belfiore   +4 more
doaj   +1 more source

On the Role of Noncircular Motions in MaNGA Galaxies. I. Global Properties

The Astrophysical Journal
Noncircular (NC) motions represent the imprints of nonaxisymmetric structures in galaxies, providing opportunities to study the physical properties of gas departing from circular rotation.
Carlos López-Cobá, Lihwai Lin, Justus Neumann, Matthew A. Bershady   +3 more
doaj   +1 more source

From gas to stars along the spiral wave: CO, HCN, and star formation variations across the spiral arms in NGC 4321 and M51

Astronomy & Astrophysics
Context. Molecular clouds form stars from the interstellar medium via gravitational collapse, following a sequence from low-density gas to high-density cores and eventually the formation of stars. In classical density wave theory, gas clouds orbiting the
Greve Minou, Neumann Lukas, Thorp Mallory, Colombo Dario, Bigiel Frank, Querejeta Miguel, Meidt Sharon E., Barnes Ashley T., Bazzi Zein, Klessen Ralf S., Leroy Adam K., Pan Hsi-An, Pety Jérôme, Ruiz-García Marina, Schinnerer Eva, Smith Rowan, Stuber Sophia, Sun Jiayi, Usero Antonio, Williams Thomas G.   +19 more
doaj   +1 more source

Secular Evolution of Spiral Galaxies. II. Formation of Quasi‐Stationary Spiral Modes [PDF]

, 1998
Xiaolei Zhang
openalex   +1 more source

Do spiral arms enhance star formation efficiency?

Spiral arms, as those of our own Milky Way, are some of the most spectacular features in disc galaxies. It has been argued that star formation should proceed more efficiently in spiral arms as a result of gas compression.
Pan, Hsi-an
core   +1 more source