Results 91 to 100 of about 1,066 (187)
On the Role of Noncircular Motions in MaNGA Galaxies. I. Global Properties
The Astrophysical JournalNoncircular (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 +3 more
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Astronomy & AstrophysicsContext. 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 +19 more
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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 ...
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100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope
The Astronomical JournalWe 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 +6 more
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Galaxy Spiral Arm Count versus Concentration and Mass: A First Look with Euclid
The Astrophysical JournalUsing catalogued information from Euclid Quick Data Release 1, we compare two-armed and three-armed spiral galaxies as classified by the Euclid Zoobot software.
Beverly J. Smith +3 more
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Star Formation in the Lopsided Galaxy Arp 291
The Astrophysical JournalWe 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
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Spiral Structure Properties, Dynamics, and Evolution in Milky Way–mass Galaxy Simulations
The Astrophysical JournalThe 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 +10 more
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مجلة بغداد للعلومAmong the most important ways to investigate galaxies' distribution over cosmic time is the luminosity function LF in terms of baryonic disc mass ψS(Mb), magnitude .
Al Najm M.N. +2 more
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Radial Distributions of Star Formation and Gas-phase Metallicity in Spiral–Elliptical Galaxy Pairs
The Astrophysical JournalUsing integral-field spectroscopy from the fourth-generation Sloan Digital Sky Survey Mapping Nearby Galaxies at Apache Point Observatory, we investigate the radial distributions of the star formation rates (SFRs) and gas-phase metallicities in spiral ...
Cailu Shi +5 more
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Conditions for Bar Formation in Bulgeless Disk Galaxies
The Astrophysical JournalWhile bars are commonly observed in disk galaxies, the precise conditions governing their formation remain incompletely understood. To investigate these conditions, we perform a suite of N -body simulations of bulgeless disk galaxies with stellar masses ...
Dajeong Jang, Woong-Tae Kim, Yun Hee Lee
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