Results 141 to 150 of about 476,460 (296)

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

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

Soft band X/K luminosity ratios in late-type galaxies and constraints on the population of supersoft X-ray sources

, 2010
We study X-ray to K-band luminosity ratios (L_X/L_K) of late-type galaxies in the 0.3-0.7 keV energy range. From the Chandra archive, we selected nine spiral and three irregular galaxies with point source detection sensitivity better than 5 x 10^36 erg/s
Bavouzet, Bell, Bogdán, Bogdán, Di Stefano, Di Stefano, Dickey, Freedman, Gilfanov, Gilfanov, Grimm, Hachisu, Hachisu, Iben, Irwin, Jarrett, Kahabka, Karachentsev, Leonard, M. Gilfanov, Mannucci, Mannucci, Nomoto, Perlmutter, Riess, Sazonov, Scannapieco, Shtykovskiy, Sullivan, Walter, Á. Bogdán   +30 more
core   +1 more source

The Schmidt Law at High Molecular Densities

, 2005
We have combined Halpha and recent high resolution CO(J=1-0) data to consider the quantitative relation between gas mass and star formation rate, or the so-called Schmidt law in nearby spiral galaxies at regions of high molecular density.
Egusa, Fumi, Komugi, Shinya, Nakanishi, Hiroyuki, Onodera, Sachiko, Sofue, Yoshiaki   +4 more
core   +1 more source

Bars do drive spiral density waves

, 2010
Recently, Buta etal. (2009) examined the question "Do Bars Drive Spiral Density Waves?", an idea supported by theoretical studies and also from a preliminary observational analysis Block etal (2004).
Athanassoula, Bertin, Binney, Block, Bosma, Buta, Buta, Buta, Buta, Elmegreen, Eskridge, Knapen, Lindblad, Masset, Rautiainen, Salo, Salo, Sellwood, Sellwood, Sellwood, Sheth, Sheth, Skrutskie, Speltincx, Toomre   +24 more
core   +1 more source

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

An investigation of star formation and dust attenuation in major mergers using ultraviolet and infrared data

, 2012
Merger processes play an important role in galaxy formation and evolution. To study the influence of merger processes on the evolution of dust properties and cosmic star formation rate, we investigate a local sample of major merger galaxies and a control
Buat, V., Burgarella, D., Iglesias-Páramo, J., Matsuoka, Y., Takeuchi, T. T., Yuan, F. -T.   +5 more
core   +3 more sources

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

Spiral structure and the rotation of galaxies [PDF]

, 1958
B. A. Vorontsov-Vel'Yaminov
openalex   +1 more source

Comparison of physical characteristics of mass and luminosity function of disk systems in barred and unbarred spiral galaxies

مجلة بغداد للعلوم
Among 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., Y. E. Rashed , H. H. AL-Dahlaki   +2 more
doaj   +1 more source