Results 61 to 70 of about 7,888 (222)

Invariant manifolds and the response of spiral arms in barred galaxies

, 2008
The unstable invariant manifolds of the short-period family of periodic orbits around the unstable Lagrangian points $L_1$ and $L_2$ of a barred galaxy define loci in the configuration space which take the form of a trailing spiral pattern.
Aguerri, Buta, C. Efthymiopoulos, C. Kalapotharakos, Contopoulos, Contopoulos, Contopoulos, Contopoulos, Efthymiopoulos, Fux, G. Contopoulos, Grobman, Hammed, Hartman, Kaufmann, Kaufmann, Laurikainen, Lindblad, P. Tsoutsis, Patsis, Patsis, Pfenniger, Pfenniger, Pichardo, Romero-Gomez, Romero-Gomez, Schwarzschild, Smith, Sparke, Tsoutsis, Tully, Voglis, Voglis   +32 more
core   +1 more source

Density Waves Inside Inner Lindblad Resonance: Nuclear Spirals in Disk Galaxies [PDF]

, 1999
We analyze formation of grand-design two-arm spiral structure in the nuclear regions of disk galaxies. Such morphology has been recently detected in a number of objects using high-resolution near-infrared observations.
Athanassoula E., Buta R., Contopoulos G., Englmaier P., Ferrers N. M., Isaac Shlosman, Mulder W. A., Peter Englmaier, Schwarz M. P., van Albada T. S.   +9 more
core   +2 more sources

Betaine‐Conjugated ß‐Peptide Foldamers: Influence of Quaternary Charge on Self‐Organization and MorphologyFormation

ChemistryOpen, EarlyView.
N‐terminal betaine conjugation modifies β‐peptide helices, influencing folding and self‐organization. For [1S, 2S]‐ACPC, folding to an H12 helix was unaffected, while [1R, 2R]‐ACHC formed an H14 helix instead of H10. Alternating heterochiral oligomers made of enantiomeric pairs of trans‐ACPC showed enhanced solubility and E‐strand formation.
Nikolett Varró, Eszter Erdei, Dóra Bogdán, Eszter Kalydi, Ruth Deme, Balázs Balogh, Imola Cs. Szigyártó, Tamás Beke‐Somfai, Zoltán Varga, Pál Szabó, István M. Mándity   +10 more
wiley   +1 more source

Star formation in isolated AMIGA galaxies: dynamical influence of bars

, 2007
Star formation depends strongly both on the local environment of galaxies, and on the internal dynamics of the interstellar medium. To disentangle the two effects, we obtained, in the framework of the AMIGA project, Ha and Gunn r photometric data for ...
Athanassoula, Athanassoula, Berentzen, Berentzen, Block, Block, Bournaud, Bournaud, Buta, Combes, Combes, Combes, de Grijs, de Vaucouleurs, de Vaucouleurs, Elmegreen, Eskridge, Espada, F. Combes, Friedli, G. Bergond, García-Burillo, García-Burillo, Hameed, Helfer, James, Jogee, Karachentseva, Knapen, Knapen, L. Verdes-Montenegro, Laurikainen, Laurikainen, Leon, Lisenfeld, Martin, Pfenniger, Quillen, Reynaud, S. Leon, S. Verley, Seigar, Shen, Sheth, Sulentic, Varela, Verdes-Montenegro, Verley, Verley   +48 more
core   +1 more source

Star formation efficiency in the Barred Spiral Galaxy NGC 4303 [PDF]

, 2010
We present new $^{12}$CO(J=1-0) observations of the barred galaxy NGC 4303 using the Nobeyama 45m telescope (NRO45) and the Combined Array for Research in Millimeter-wave Astronomy (CARMA). The H$\alpha$ images of barred spiral galaxies often show active
Alonso-Herrero, Arimoto, Bigiel, Calzetti, Colina, Corder, de Vaucouleurs, Egusa, Egusa, Gezari, Gezari, Helfer, Jin Koda, Kennicutt, Koda, Koda, Koopmann, Kuno, Kurono, Laine, Leroy, Rieko Momose, Sachiko K. Okumura, Sakamoto, Sakamoto, Sault, Sawada, Schinnerer, Scoville, Sheth, Sheth, Strong, Tamburro, Tschöke, Tsuyoshi Sawada, Wong   +35 more
core   +2 more sources

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

In silico, in vitro and ex vivo characterization of cystic fibrosis transmembrane conductance regulator pathogenic variants localized in the fourth intracellular loop and their rescue by modulators

British Journal of Pharmacology, EarlyView.
Background and Purpose Cystic fibrosis (CF) is due to loss‐of‐function variants of the CF transmembrane conductance regulator (CFTR) channel. The most effective treatment for people with CF carrying the F508del mutation is the triple combination of elexacaftor–tezacaftor–ivacaftor (ETI).
Emanuela Pesce, Valeria Tomati, Valeria Capurro, Mariateresa Lena, Cristina Pastorino, Miro Astore, Serdar Kuyucak, Benoit Chevalier, Elvira Sondo, Federico Cresta, Alice Dighero, Vito Terlizzi, Cristina Fevola, Stefano Costa, Maria Cristina Lucanto, Valeria Daccò, Laura Claut, Francesca Ficili, Benedetta Fabrizzi, Renata Bocciardi, Federico Zara, Carlo Castellani, Luis J. V. Galietta, Shafagh A. Waters, Alexandre Hinzpeter, Nicoletta Pedemonte   +25 more
wiley   +1 more source

Star Formation History in Barred Spiral Galaxies. AGN Feedback [PDF]

, 2017
We present a numerical study of the impact of AGN accretion and feedback on the star formation history of barred disc galaxies. Our goal is to determine whether the effect of feedback is positive (enhanced star formation) or negative (quenched star ...
Ellison, Sara L., Kawata, Daisuke, Martel, Hugo, Robichaud, Fidèle, Williamson, David   +4 more
core   +2 more sources

SDSS-IV MaNGA: Physical Origins of Double-peaked Narrow Emission-line Spaxels in Barred Galaxies

The Astrophysical Journal
The physical origins of double-peaked narrow emission-line spaxels (DPSs) in barred galaxies are explored through the analysis of a sample of 72 barred double-peaked emission-line galaxies (DPGs) extracted from the MaNGA data set.
Jiajie Qiu, Shiyin Shen, Ruixiang Chang, Qianwen Zhao, Qi Zeng   +4 more
doaj   +1 more source

Statistical Study of the Star Formation Efficiency in Bars: Is Star Formation Suppressed in Gas-rich Bars?

The Astrophysical Journal, 2023
The dependence of the star formation efficiency (SFE) on galactic structures—especially whether the SFE in the bar region is lower than those in other regions—has recently been debated. We report the SFEs of 18 nearby gas-rich massive star-forming barred
Fumiya Maeda, Fumi Egusa, Kouji Ohta, Yusuke Fujimoto, Asao Habe   +4 more
doaj   +1 more source