Results 151 to 160 of about 482,012 (314)

Constraints on the Decomposition of the Rotation Curves of Spiral Galaxies

, 2002
I discuss anew how arguments about the internal dynamics of galactic disks set constraints on the otherwise ambiguous decomposition of the rotation curves of spiral galaxies into the contributions by the various constituents of the galaxies.
Fuchs, B.
core   +2 more sources

100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope

The Astronomical Journal
We describe the results of observations with the 100 m Robert C. Byrd Green Bank Telescope in the H i line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys.
Aleksandra E. Nazarova, John M. Cannon, Igor D. Karachentsev, Dmitry I. Makarov, Maksim I. Chazov, Lila Schisgal, William St. John   +6 more
doaj   +1 more source

Dust Deficiency in the Interacting Galaxy NGC 3077

Galaxies, 2017
Using 70 μ m observations taken with the PACS instrument of the Herschel space telescope, the dust content of the nearby and interacting spiral galaxy NGC 3077 has been compared with the dust content of the isolated galaxies such as NGC 2841, NGC ...
Jairo Armijos-Abendaño, Ericson López, Mario Llerena, Franklin Aldás, Crispin Logan   +4 more
doaj   +1 more source

The Star Formation Law in Nearby Galaxies on Sub-Kpc Scales

, 2008
(Abridged) We present a comprehensive analysis of the relationship between star formation rate surface density (SFR SD) and gas surface density (gas SD) at sub-kpc resolution in a sample of 18 nearby galaxies.
Bigiel, Frank, Brinks, Elias, de Blok, W. J. G., Leroy, Adam, Madore, Barry, Thornley, Michele D., Walter, Fabian   +6 more
core   +1 more source

Polarimetric Observations of Spiral Galaxies

Publications of the Astronomical Society of the Pacific, 1967
The extragalactic systems NCC 3031, NCC 4594, NGC 5194, and NGC 5457 have been observed polarimetrically. Linear polarization between 0.1 and 1.0 percent was detected in the spiral arms of all four galaxies. The planes of vibration indicate that reflection as well as interstellar absorption of starlight by the internal dust clouds of the observed ...
openaire   +1 more source

Star Formation in the Lopsided Galaxy Arp 291

The Astrophysical Journal
We have investigated the star formation process taking place in the lopsided galaxy Arp 291, based on narrowband images in the H α , [N ii ] λ 6583, and [O iii ] λ 5007 emission lines, obtained using the modern tunable photometer MaNGaL at the Caucasus ...
Irina S. Proshina, Dmitriy V. Oparin
doaj   +1 more source

Stellar Orbital Studies in Normal Spiral Galaxies II: Restrictions to Structural and Dynamical parameters on Spiral Arms

, 2015
Making use of a set of detailed potential models for normal spiral galaxies, we analyze the disk stellar orbital dynamics as the structural and dynamical parameters of the spiral arms (mass, pattern speed and pitch angle) are gradually modified.
Moreno, Edmundo, Pichardo, Bárbara, Pérez-Villegas, Angeles   +2 more
core   +1 more source

What determines the sizes of bars in spiral galaxies? [PDF]

, 2019
Peter Erwin
openalex   +1 more source

Spiral Structure Properties, Dynamics, and Evolution in Milky Way–mass Galaxy Simulations

The Astrophysical Journal
The structure of spiral galaxies is essential to understanding the dynamics and evolution of disk galaxies; however, the precise nature of spiral arms remains uncertain.
J. R. Quinn, S. R. Loebman, K. J. Daniel, L. Beraldo e Silva, A. Wetzel, V. P. Debattista, A. Arora, S. Ansar, F. McCluskey, D. Masoumi, J. Bailin   +10 more
doaj   +1 more source

HIGH-VELOCITY CLOUDS IN THE NEARBY SPIRAL GALAXY M 83 [PDF]

, 2009
Eric D. Miller, Joel N. Bregman, Bart P. Wakker   +2 more
openalex   +1 more source