Results 21 to 30 of about 702 (172)

The Next Generation Virgo Cluster Survey. XXXIV. Ultracompact Dwarf Galaxies in the Virgo Cluster

The Astrophysical Journal Supplement Series, 2020
Abstract We present a study of ultracompact dwarf (UCD) galaxies in the Virgo cluster based mainly on imaging from the Next Generation Virgo Cluster Survey (NGVS). Using ∼100 deg2 of u*giz imaging, we have identified more than 600 candidate UCDs, from the core of Virgo out to its virial radius.
Liu, Chengze, Côté, Patrick, Peng, Eric W., Roediger, Joel, Zhang, Hongxin, Ferrarese, Laura, Sánchez-Janssen, Rubén, Guhathakurta, Puragra, Yang, Xiaohu, Jing, Yipeng, Alamo-Martinez, Karla, Blakeslee, John P., Cuilandre, Jean-Charles, Duc, Pierre-Alain, Durrell, Patrick, Gwyn, Stephen, Jordán, Andres, Ko, Youkyung, Lançon, Ariane, Lim, Sungsoon, Longobardi, Alessia, Mei, Simona, Mihos, J. Christopher, Munoz, Roberto, Powalka, Mathieu, Puzia, Thomas, Spengler, Chelsea, Toloba, Elisa, Peng, Eric, Blakeslee, John, Boselli, Alessandro   +30 more
openaire   +6 more sources

New perspective on galaxy clustering as a cosmological probe: General relativistic effects [PDF]

Physical Review D, 2009
10 pages, 2 figures, accepted for publication in Physical Review ...
Yoo, Jaiyul, Fitzpatrick, A. Liam, Zaldarriaga, Matias   +2 more
openaire   +2 more sources

Generation and Implications of Post-Merger Turbulence in Clusters of Galaxies [PDF]

Symposium - International Astronomical Union, 1998
Observations in X-ray and optical suggest that mergers of sub-clusters with galaxy clusters are quite common (for Coma see e.g., White et al. 1993; Colless & Dunn 1996; Ishizaka & Mineshige 1996). A merger leads to violent relaxation of the dissipationless dark matter resulting in a time-dependent gravitational potential. This in turn generates
openaire   +1 more source

Solvent‐Guided Chiral Assemblies and Chemical Doping of OEG‐Functionalized Conjugated Polymers

Advanced Materials, EarlyView.
Solvent‐dependent aggregation pathways dictate whether conjugated polymers form chiral lyotropic liquid‐crystalline assemblies or achiral packed aggregates. Mapping solvent‐controlled β₁ and β2 states reveals that weaker backbone association favors β₁ aggregates and reorganizable twisted mesophases, whereas stronger backbone association favors β2 ...
Sanghyun Jeon, Justin Scott Neu, Nahyun Ahn, Ayse Senlik, Yen‐Chi Chen, Pravini S. Fernando, Priyotosh Bairagya, Chetan Kumar Prasad, Janice Mihyun Baek, Wei You, Ying Diao   +10 more
wiley   +1 more source

Testing generalized scalar-tensor theories of gravity with clusters of galaxies

Physical Review D, 2023
We test the generalized scalar-tensor theory in static systems, namely galaxy clusters. The Degenerate higher-order scalar-tensor (DHOST) theory modifies the Newtonian potential through effective Newtonian constant and $Ξ_1$ parameter in the small scale, which modifies the hydrostatic equilibrium.
Haridasu B. S., Karmakar P., De Petris M., Cardone V. F., Maoli R.   +4 more
openaire   +3 more sources

Solid Harmonic Wavelet Bispectrum for Image Analysis

Advanced Science, EarlyView.
The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown, Mathilda Avirett‐Mackenzie, Carolin Villforth, Georgios Exarchakis   +3 more
wiley   +1 more source

Early Starbursts and Magnetic Field Generation in Galaxy Clusters

The Astrophysical Journal, 2000
24 pages, 4 figures, to appear in ...
Voelk, Heinrich J., Atoyan, A. M.
openaire   +2 more sources

The Next Generation Virgo Cluster Survey (NGVS). XXXII. A Search for Globular Cluster Substructures in the Virgo Galaxy Cluster Core [PDF]

The Astrophysical Journal, 2018
Abstract Substructure in globular cluster (GC) populations around large galaxies is expected in galaxy formation scenarios that involve accretion or merger events, and it has been searched for using direct associations between GCs and structure in the diffuse galaxy light, or with GC kinematics.
Mathieu Powalka, Thomas H. Puzia, Ariane Lançon, Alessia Longobardi, Eric W. Peng, Pierre-Alain Duc, Karla Alamo-Martínez, John P. Blakeslee, Patrick Côté, Jean-Charles Cuillandre, Patrick Durrell, Paul Eigenthaler, Laura Ferrarese, Puragra Guhathakurta, S. D. J. Gwyn, Patrick Hudelot, Chengze Liu, Simona Mei, Roberto P. Muñoz, Joel Roediger, Rubén Sánchez-Janssen, Elisa Toloba, Hongxin Zhang   +22 more
openaire   +5 more sources

Kaempferol Attenuates Spaceflight‐Associated Knee Cartilage Degradation by Targeting NOX4‐Mediated Mitochondrial Dysfunction

Advanced Science, EarlyView.
We have shown that both simulated and actual spaceflight contribute to cartilage degradation in the knees of mice. Using RNA sequencing and bioenergetic profiling, we identified NADPH oxidase 4 (NOX4) as a key factor driving these changes. Additionally, we found that kaempferol, a naturally occurring flavonoid that binds directly to NOX4, reduces ...
Yuesong Yin, Ruiling Xu, Meagan J. Makarczyk, Jia‐Jun Liu, Silvia Liu, Matthew Z. Shi, Roberta Di Carlo, Michael F. Almeida, Alex Garris, Sarah Day, Rebekah Sanchez‐Hodge, Jonathan C. Schisler, Aleeza H. Zilberman, Noah G. Allen, Angela J. Kubik, Elizabeth A. Blaber, Arnold Z. Olali, Wanqing Xie, Douglas C. Wallace, Christopher E. Mason, Peter G. Alexander, Giuseppe Intini, Afshin Beheshti, Hang Lin   +23 more
wiley   +1 more source

From Flow to Function: Using Different Static Mixers to Fabricate Microarchitected Materials Via Chaotic Printing

Advanced Science, EarlyView.
Complex microarchitectures emerge from simple flow‐driven transformations as static mixers iteratively reorient and split material domains. Coupled with diverse deposition strategies, chaotic printing provides an accessible platform for fabricating architected materials that support biologically and chemically relevant processes. ABSTRACT Nature builds
Edna Johana Bolívar‐Monsalve, Carlos Fernando Ceballos‐González, Diego Alonso Quevedo‐Moreno, Irving Isaí Rendón‐Moreno, Ariel Cantoral‐Sánchez, Héctor Ambriz‐González, Mario Moisés Alvarez, Grissel Trujillo‐de Santiago   +7 more
wiley   +1 more source