Results 81 to 90 of about 151,190 (310)

A New Dynamical Parameter for the Study of Sticky Orbits in a 3D Galactic Model

Open Astronomy, 2011
A 3D dynamical model is used to study the motion in the central parts of an elliptical galaxy, hosting a massive and dense nucleus. Our aim is to investigate the regular or chaotic character of the motion, with emphasis in the different chaotic ...
Zotos Euaggelos E.
doaj   +1 more source

The nature and origin of disky elliptical galaxies [PDF]

, 2002
The observational trend that disky elliptical galaxies exhibit younger luminosity- weighted ages than boxy ellipticals is investigated. The presence of a possible young stellar disk embedded in these galaxies is explored by comparing kinematics derived ...
McDermid, Richard Morgan
core  

The ATLAS(3D) project - XXV. Two-dimensional kinematic analysis of simulated galaxies and the cosmological origin of fast and slow rotators [PDF]

, 2014
We present a detailed two-dimensional stellar dynamical analysis of as ample of 44 cosmological hydrodynamical simulations of individual central galaxies with stellar masses of 2 x 1010Msun ∼≤ Mstar ∼≤ 6x 1011Msun.
Bayet, E, Ven, G. v. d., Bureau, M, Davis, T., Davies, RL, Oser, L, Duc, P-A, Morganti, R., Johansson, P., McDermid, R., Johansson, PH, Davis, T. A., Oosterloo, T, Blitz, L., McDermid, R. M., Oser, L., Naab, T, Weijmans, A., Sarzi, Marc, Duc, P. -A., Alatalo, K, Davies, R., Khochfar, S, Sarzi, M, Alatalo, Katherine, Duc, P.A., Davis, Timothy A., van de Ven, G, Weijmans, A, Khochfar, S., Scott, N, Bois, M., Bournaud, Frederic, Bayet, E., Serra, P., Krajnovic, D, Blitz, L, van de Ven, G., Hirschmann, M., Cappellari, M, Kuntschner, H., de Zeeuw, P. T., Cappellari, Michele, Duc, P.-A., Bournaud, F., Scott, N., Kuntschner, H, Bureau, M., Davis, T., L., Hirschmann, M, Naab, T., Young, L., Davies, Roger, Hirschmann, Michaela, Bayet, Estelle, Krajnovi, D., Morganti, R, de Zeeuw, P., Serra, P, Davies, R. L., Alatalo, K., McDermid, Richard M., Bois, M, Emsellem, E, de Zeeuw, PT, Ven, G. van de, Duc, P.- A., Crocker, A., Bournaud, F, McDermid, RM, Crocker, A, Davis, TA, Krajnovic, D., Emsellem, E., Duc, P., Cappellari, M., Johansson, P. H., Oosterloo, T., Young, LM, Young, Lisa M., Davis, T.,, Naab, Thorsten, Sarzi, M., Young, L. M., de Zeeuw, P.T.   +84 more
core   +2 more sources

Bronchoscopy Robot with Enhanced Flexibility and Stability via Multi‐Segment Variable Stiffness Catheter

Advanced Intelligent Systems, EarlyView.
This work presents a magnetic bronchoscopy robot with a novel multi‐segment variable stiffness catheter. This catheter can not only move flexibly in the narrow bronchi but also harden according to the need to provide support. Combined with remote wireless magnetic field drive, it provides a more precise and effective solution for biopsy of deep lung ...
Shucong Yin, Bin Huang, Shiyuan Dong, Junhao Wang, Liangshen Zhao, Yang Yang, Bingkun Bao, Hongen Liao, Fang Chen, Tianqi Huang, Boyu Zhang   +10 more
wiley   +1 more source

Equivalent width Measurements in Optical Spectra of Galaxies in Local Clusters: Hints On the Star Formation History in Clusters

Open Astronomy, 2011
Equivalent widths of spectral lines in the optical spectra of galaxies are commonly used to characterize their stellar populations and to get some insight on their evolution.
Fritz Jacopo, Poggianti Bianca M., Cava Antonio, Moretti Alessia   +3 more
doaj   +1 more source

Are galaxies shy?

Astrophysics and Space Science, 2002
Until 1996, there was little evidence that most galaxies were ``shy'', i.e. that they would hide their stars behind a veil of dust and turn red when forming stars, radiating the bulk of their luminosity in the infrared (IR) at a given epoch of their history.
openaire   +2 more sources

Exploring the star formation histories of galaxies [PDF]

, 1999
In this thesis, I explore the star formation histories of both spiral and elliptical galaxies. In Part 1,1 present an in-depth study of the star formation histories of spiral galaxies with a wide range of properties. Optical and near-infrared colours are
Bell, Eric Findlay, Bell, E.F.
core  

Optimized Wavy Thermal Radiative Analysis of Electrochemically Ternary Hybrid Nanomaterials Affected by an Induced Magnetic Force: An ANN‐Based Levenberg–Marquardt Backpropagation Approach

Advanced Physics Research, EarlyView.
This diagram illustrates the wavy flow configuration of the model in a Cartesian coordinate system. It represents the heat and mass transfer characteristics of ternary hybrid nanofluids over a vertically wavy surface in the presence of an induced magnetic field and double‐diffusive mixed convection.
Latif Ahmad, Saleem Javed, Umair Khan, Muhammad Iqbal, Syed Modassir Hussain   +4 more
wiley   +1 more source

Low luminosity elliptical galaxies [PDF]

, 1998
Long-slit spectra for the photometric axes of a sample of 14 elliptical galaxies, predominantly low-luminosity ellipticals, in the Virgo cluster and in nearby groups, are studied to investigate the galaxy kinematical structure and stellar evolutionary ...
Halliday, Claire, Halliday, C.
core  

Effects of Dietary Mannan Oligosaccharides on Growth, Disease Resistance, and Gut Microbiota in Zebrafish

Animal Research and One Health, EarlyView.
Supplementation with mannan oligosaccharides (MOS) enhances growth, disease resistance, antioxidant capacity, and gut microbiota diversity while suppressing inflammation, apoptosis, and strengthening intestinal barrier integrity in zebrafish challenged with LPS or DSS.
Zhiyuan Lu, Longjiang Tang, Lei Deng, Ziheng Ren, Zhiyuan Gong   +4 more
wiley   +1 more source