Results 1 to 10 of about 7,775 (165)

A Milky Way-like barred spiral galaxy at a redshift of 3. [PDF]

Nature, 2023
Costantin L, Pérez-González PG, Guo Y, Buttitta C, Jogee S, Bagley MB, Barro G, Kartaltepe JS, Koekemoer AM, Cabello C, Corsini EM, Méndez-Abreu J, de la Vega A, Iyer KG, Bisigello L, Cheng Y, Morelli L, Arrabal Haro P, Buitrago F, Cooper MC, Dekel A, Dickinson M, Finkelstein SL, Giavalisco M, Holwerda BW, Huertas-Company M, Lucas RA, Papovich C, Pirzkal N, Seillé LM, Vega-Ferrero J, Wuyts S, Yung LYA.   +32 more
europepmc   +3 more sources

Dynamically Driven Evolution of Molecular Gas in the Barred Spiral Galaxy M83 Traced by CO J = 2–1/1–0 Line Ratio Variations

The Astrophysical Journal
We show the variations of the CO J = 2–1/1–0 line ratio ( R _21/10 ) across the barred spiral galaxy M83, using the 46 pc resolution data from the Atacama Large Millimeter/submillimeter Array. The R _21/10 map clearly evidences the systematic large-scale
Jin Koda, Fumi Egusa, Akihiko Hirota, Amanda M Lee, Tsuyoshi Sawada, Fumiya Maeda   +5 more
doaj   +2 more sources

Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions [PDF]

Living Reviews in Relativity, 2012
Famaey B, McGaugh SS.
exaly   +2 more sources

On the plausible origins of the spiral character of galaxies

Open Astronomy, 2021
We here-in demonstrate that the proposed hitherto unknown gravitomagnetic dark-force that hypothetically explains the Flat Rotation Curves of Spiral Galaxies — this same force, explains very well, the logarithmic and as-well, the barred spiral shapes of ...
Nyambuya Golden Gadzirayi
doaj   +1 more source

AGN spiral galaxies in groups: effects of bars [PDF]

, 2014
We explore properties of barred active spiral galaxies in groups selected from the SDSS-DR7, with the aim of assessing the effects of bars on AGN and the role of the high density environment.
Alonso, Sol, Coldwell, Georgina, Lambas, Diego García   +2 more
core   +4 more sources

Formation of Major Types of Galaxies Based on the Energy Circulation Theory

Reports in Advances of Physical Sciences, 2022
The standard cosmology can answer almost nothing about how the structure of a galaxy is formed. It expects a supermassive black hole at the center and dark matter in the halo to explain the circulation of stars and its velocity.
Shigeto Nagao
doaj   +1 more source

PHANGS–JWST First Results: Interstellar Medium Structure on the Turbulent Jeans Scale in Four Disk Galaxies Observed by JWST and the Atacama Large Millimeter/submillimeter Array

The Astrophysical Journal Letters, 2023
JWST/Mid-Infrared Instrument imaging of the nearby galaxies IC 5332, NGC 628, NGC 1365, and NGC 7496 from PHANGS reveals a richness of gas structures that in each case form a quasi-regular network of interconnected filaments, shells, and voids.
Sharon E. Meidt, Erik Rosolowsky, Jiayi Sun, Eric W. Koch, Ralf S. Klessen, Adam K. Leroy, Eva Schinnerer, Ashley. T. Barnes, Simon C. O. Glover, Janice C. Lee, Arjen van der Wel, Elizabeth J. Watkins, Thomas G. Williams, F. Bigiel, Médéric Boquien, Guillermo A. Blanc, Yixian Cao, Mélanie Chevance, Daniel A. Dale, Oleg V. Egorov, Eric Emsellem, Kathryn Grasha, Jonathan D. Henshaw, J. M. Diederik Kruijssen, Kirsten L. Larson, Daizhong Liu, Eric J. Murphy, Jérôme Pety, Miguel Querejeta, Toshiki Saito, Karin M. Sandstrom, Rowan J. Smith, Mattia C. Sormani, David A. Thilker   +33 more
doaj   +1 more source

PHANGS–JWST First Results: Rapid Evolution of Star Formation in the Central Molecular Gas Ring of NGC 1365

The Astrophysical Journal Letters, 2023
Large-scale bars can fuel galaxy centers with molecular gas, often leading to the development of dense ringlike structures where intense star formation occurs, forming a very different environment compared to galactic disks.
Eva Schinnerer, Eric Emsellem, Jonathan D. Henshaw, Daizhong Liu, Sharon E. Meidt, Miguel Querejeta, Florent Renaud, Mattia C. Sormani, Jiayi Sun, Oleg V. Egorov, Kirsten L. Larson, Adam K. Leroy, Erik Rosolowsky, Karin M. Sandstrom, T. G. Williams, Ashley. T. Barnes, F. Bigiel, Mélanie Chevance, Yixian Cao, Rupali Chandar, Daniel A. Dale, Cosima Eibensteiner, Simon C. O. Glover, Kathryn Grasha, Stephen Hannon, Hamid Hassani, Jaeyeon Kim, Ralf S. Klessen, J. M. Diederik Kruijssen, Eric J. Murphy, Justus Neumann, Hsi-An Pan, Jérôme Pety, Toshiki Saito, Sophia K. Stuber, Robin G. Treß, Antonio Usero, Elizabeth J. Watkins, Bradley C. Whitmore, PHANGS   +39 more
doaj   +1 more source

The TYPHOON Stellar Population Synthesis Survey. I. The Young Stellar Population of the Great Barred Spiral NGC 1365

The Astrophysical Journal, 2023
We analyze TYPHOON long-slit-absorption line spectra of the starburst barred spiral galaxy NGC 1365 obtained with the Progressive Integral Step Method covering an area of 15 kpc ^2 .
Eva Sextl, Rolf-Peter Kudritzki, Andreas Burkert, I-Ting Ho, H. Jabran Zahid, Mark Seibert, Andrew J. Battisti, Barry F. Madore, Jeffrey A. Rich   +8 more
doaj   +1 more source

Mechanisms based on chaotic flows that support structures in barred-spiral systems

EPJ Web of Conferences, 2012
I summarize the dynamical mechanisms that have been found to shape structures such as the spirals and the bars in barred-spiral systems. Response models and orbital analysis are used to study the dynamics in potentials estimated from near-infrared images
Patsis P.A.
doaj   +1 more source