Results 41 to 50 of about 85,185 (266)

Supercomputer simulations of disk galaxies

Astronomical & Astrophysical Transactions, 2001
The time evolution of models for an isolated disk of highly flattened galaxies of stars is investigated by direct integration of the Newtonian equations of motion of N=30,000 identical stars over a time span of many galactic rotations. Certain astronomical implications of the simulations to actual disk-shaped (i.e.
Griv, Evgeny, Gedalin, Michael, Liverts, Edward, Eichler, David, Kimhi, Yehoshua   +4 more
openaire   +2 more sources

Structural Parameters of Thin and Thick Disks in Edge-On Disk Galaxies

, 2005
We analyze the global structure of 34 late-type, edge-on, undisturbed, disk galaxies spanning a wide range of mass. We measure structural parameters for the galaxies using two-dimensional least-squares fitting to our $R$-band photometry. The fits require
Binggeli B., Buser R., de Grijs R., de Grijs R., Fuhrmann K., Gilmore G., Julianne J. Dalcanton, Karachentsev I. D., Karachentsev I. D., Kudrya Y. N., Pagel B. E. J., Peter Yoachim, Pohlen M., Robin A. C., Shaw M. A., Staveley-Smith L., van der Kruit P. C., van der Kruit P. C., van der Kruit P. C., van der Kruit P. C., van Dokkum P. G.   +20 more
core   +1 more source

Three Types of Galaxy Disks

, 2007
We present our new scheme for the classification of radial stellar surface brightness profiles for disk galaxies. We summarize the current theoretical attempts to understand their origin and give an example of an application by comparing local galaxies with their counterparts at high redshift (z~1).
Pohlen, M., Erwin, P., Trujillo, I., Beckman, J.   +3 more
openaire   +4 more sources

Detectability of large-scale counter-rotating stellar disks in galaxies with integral-field spectroscopy [PDF]

, 2021
Michela Rubino, A. Pizzella, L. Morelli, L. Coccato, Elisa Portaluri, Victor P. Debattista, E. M. Corsini, E. Dalla Bontà   +7 more
openalex   +3 more sources

Finding Massive Double-exponential Disk Galaxies with Extended Low Surface Brightness Stellar Disk: An IllustrisTNG Exploration

The Astrophysical Journal
We study massive disk galaxies (stellar mass > = 10 ^11 M _⊙ ) at z = 0 from IllustrisTNG simulation to detect galaxies that contain two exponential stellar disks—a central high surface brightness (HSB) disk surrounded by an extended low surface ...
Suchira Sarkar, Kanak Saha
doaj   +1 more source

WHEN DID ROUND DISK GALAXIES FORM? [PDF]

The Astrophysical Journal, 2015
When and how galaxy morphology such as disk and bulge seen in the present-day universe emerged is still not clear. In the universe at $z\gtrsim 2$, galaxies with various morphology are seen, and star-forming galaxies at $z\sim2$ show an intrinsic shape of bar-like structure. Then, when did round disk structure form?
T. M. Takeuchi, K. Ohta, S. Yuma, K. Yabe   +3 more
openaire   +2 more sources

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Massive Quiescent Disk Galaxies at 0.5 ≤ z ≤ 1 in CANDELS: Color Gradients and Likely Origin

The Astrophysical Journal
A rare population of massive disk-dominated quiescent galaxies has recently drawn much attention, which intrudes the red sequence (RS) population without destroying the underlying stellar disks.
Qifan Cui, Pinsong Zhao, F. S. Liu
doaj   +1 more source

Versatile Gasochromic Hydrogen Detection via Supraparticle‐Based Applied Composite Materials

Advanced Optical Materials, EarlyView.
Silica‐platinum‐resazurin supraparticles are embedded into PMMA to form suprabeads and thin films. The thereby obtained indicators change color from purple to pink to colorless on hydrogen exposure. The indicator systems are tested under various environmental conditions, and their performance is related to their microscopically visualized structure ...
Sarah Wenderoth, Maximilian Oppmann, Daniel Dzoic, Thomas Zimmermann, Mickaël Lejoyeux, Andreas Graff, Benedikt Schug, Susanne Wintzheimer   +7 more
wiley   +1 more source

The Thickness of Galaxy Disks from z = 5 to 0 Probed by JWST

The Astrophysical Journal Letters
Although a thick disk is a structure prevalent in local disk galaxies and also present in our home Galaxy, its formation and evolution are still unclear.
Jianhui Lian, Li Luo
doaj   +1 more source