Results 41 to 50 of about 455,148 (185)

Discovery of a Barred-spiral Galaxy at zspec = 3.16. I. Bar Identification and Properties

The Astrophysical Journal
The formation of stellar bars is an important milestone in the secular evolution of spiral galaxies, which typically indicates the presence of a massive rotationally supported disk.
Daniel Ivanov, Mauro Giavalisco, Yingjie Cheng, Yuchen Guo, Luca Costantin, Elena D’Onghia, John R. Weaver, Shardha Jogee, Katherine E. Whitaker   +8 more
doaj   +1 more source

Normal Spiral Grand-Design Morphologies in Self-Consistent N-Body Models

Galaxies
Grand-design spiral structures typically emerge in N-body simulations of disk galaxies as barred-spiral configurations forming during the early evolutionary stages of the system.
P. A. Patsis, P. Okalidis
doaj   +1 more source

Type‐III Solar Radio Bursts at Mars: A 16.5‐Year Catalog From Mars Express‐MARSIS at 0.1–5.5 MHz

Space Weather, Volume 24, Issue 10, October 2026.
Abstract The most intense radio feature in the Solar System are the solar Type‐III radio bursts, which are associated with electron beams that propagate along open magnetic field lines. Although solar radio bursts have been studied since the 1940s, observations remain mainly restricted within 1 AU.
Beatriz Sánchez‐Cano, Samuel Carter, Mark Lester, Olivier Witasse, Caitriona M. Jackman, Sophie Musset, Baptiste Cecconi, Louis Siebenaler, Simon Joyce, Luis Alberto Cañizares, Andrea Cicchetti, Alexandra R. Fogg, Peter Gallagher, Christopher Gerekos, Yuki Harada, Alessandro Ippolito, Immanuel Jebaraj, Dikshita Meggi, Roberto Orosei, Hermann Opgenoorth, Jeff Plaut, Catherine Regan, Katerina Stergiopoulou   +22 more
wiley   +1 more source

Arm and interarm abundance gradients in CALIFA spiral galaxies [PDF]

, 2017
Spiral arms are the most singular features in disc galaxies. These structures can exhibit different patterns, namely grand design and flocculent arms, with easily distinguishable characteristics.
Marino, R.A, Márquez, I., Sánchez, S.F, Kehrig, C, Costantin, Luca, Sánchez-Menguiano, L, Méndez-Abreu, J., Sánchez-Menguiano, L., LÃ3pez-Sánchez, Ã.. R., López-Sánchez, R., P. Sánchez-Blázquez, McIntosh, D.H, A. de Lorenzo-Cáceres, D. H. McIntosh, García-Benito, R., Sánchez, S. F., De Lorenzo-Cáceres, A, V. P. Debattista, M. Mollá, Cavichia, O, Catalán-Torrecilla, C., Ruiz-Lara, T., De Lorenzo-Cáceres, A., García-Benito, R, Sánchez-Blázquez, P, T. Ruiz-Lara, L. Costantin, Á. R. López-Sánchez, Márquez, I., García-Benito, R., Sánchez-Menguiano, L., González Delgado, Rosa M., Mast, Damian, Bland-Hawthorn, J, Gónzalez Delgado, R. M., Marino, R. A., Mast, D, Florido, E, Cano-Díaz, M., Walcher, C. J., I. Márquez, Walcher, C.J., Cano-Díaz, M., Debattista, Victor P, Ruiz-Lara, T, Costantin, L., Catalán-Torrecilla, C., M. Cano-Díaz, C. Kehrig, González Delgado, R.M, Sánchez-Blázquez, P., de Lorenzo-Cáceres, A., O. Cavichia, L. Galbany, R. M. Gónzalez Delgado, Pérez, I., D. Mast, Márquez, Isabel, GÃ3nzalez Delgado, R. M., Sánchez, S. F., Kehrig, C., I. Pérez, Sánchez, S.F., Galbany, Lluís, García-Benito, Rubén, Walcher, C.J, Sánchez-Menguiano, Laura, López-Sánchez, A.R, C. Catalán-Torrecilla, Costantin, L, R. García-Benito, Méndez-Abreu, J, Méndez-Abreu, J., J. Méndez-Abreu, Ascasibar, Y., Y. Ascasibar, DEBATTISTA, VICTOR P., López-Sánchez, Á.R., Bland-Hawthorn, J., Catalán Torrecilla, Cristina, Márquez, I, Mollá, M., Galbany, L., C. J. Walcher, Mast, D., McIntosh, D. H., Sánchez-Blázquez, P., Molla, M, L. Sánchez-Menguiano, Galbany, L, J. Bland-Hawthorn, Marino, R.A., Pérez, I., Cavichia, O., R. A. Marino, McIntosh, D.H., Catalán-Torrecilla, C, S. F. Sánchez, Cano-Díaz, M, Florido, E., Debattista, V. P., E. Florido, Mollá, M., Ascasibar, Y, Debattista, V.P., Sánchez Blazquez, Patricia, L. Galbany, L., Marino,R.A., et al., otros, ...   +109 more
core   +1 more source

The stellar dynamics of spiral arms in barred spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2006
Abstract A dynamical mechanism is proposed that explains the spiral structure observed frequently as a continuation of the bars in barred spiral galaxies. It is argued that the part of the spirals attached to the bar is due to chaotic orbits. These are chaotic orbits that exhibit for long time intervals a 4:1-resonance orbital behaviour.
openaire   +1 more source

Genomic Signatures of Endemic Pathogen Exposure in a Declining Amphibian

Molecular Ecology, Volume 35, Issue 20, October 2026.
ABSTRACT Endemic wildlife diseases can impose strong selection on threatened populations, yet whether persistence is associated with adaptive genomic responses remains poorly understood. We tested whether long‐term exposure to Batrachochytrium dendrobatidis (Bd) following population declines has left detectable selection signatures in the genome of the
Alexander S. Wendt, Lee Berger, Lee F. Skerratt, Laura A. Brannelly   +3 more
wiley   +1 more source

CO OBSERVATIONS OF BARRED SPIRAL GALAXIES [PDF]

Journal of The Korean Astronomical Society, 2006
We present the results of a highly sensitive ( mK rms) survey toward the central parts of 22 barred spiral galaxies in line using the NRAO 12m telescope at Kitt Peak. Seven of the target galaxies were detected in CO; NGC 3686 has been detected with CO for the first time. We estimated central CO fluxes of and molecular gas masses of for those galaxies.
Min-Young Lee, Chang-Won Lee, Hyo-Ryoung Kim, Myung-Hyun Rhee   +3 more
openaire   +1 more source

Circumnuclear Star-forming Regions in barred Galaxies

, 1999
We present high-resolution Hα velocity fields and rotation curves of the circum nuclear star-forming regions of five barred galaxies. Two of the five objects show substantially smaller initial rises than the three others; these two objects also have ...
Knapen, J., Laine, S., Relano, M.
core   +2 more sources

Comparison of noble gas characteristics of lunar soil 61220 grain‐size fractions: Implications for exploration‐supportive volatile resources

Soil Science Society of America Journal, Volume 90, Issue 5, September/October 2026.
Abstract This study examined the noble gas inventories of different grain size fractions of lunar soil 61220 as a proxy for solar wind‐implanted volatiles of in situ resource utilization (ISRU) interest (e.g., H2O and noble gases). Sample 61220 is representative of a “dry” highland regolith, comparable to those that may be sampled by missions exploring
M. Nottingham, J. Pernet‐Fisher, S. Bell, J. D. Gilmour, K. H. Joy   +4 more
wiley   +1 more source

Diffusion in barred-spiral galaxies

, 2010
We characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation ...
Brunetti, Maura, Chiappini, Cristina, Pfenniger, Daniel   +2 more
openaire   +3 more sources