Results 31 to 40 of about 43,226 (214)

The Physical Thickness of Stellar Disks to z ∼ 2

The Astrophysical Journal, 2023
In local disk galaxies such as our Milky Way, older stars generally inhabit a thicker disk than their younger counterparts. Two competing models have attempted to explain this result: one in which stars first form in thin disks that gradually thicken ...
Kathleen A. Hamilton-Campos, Raymond C. Simons, Molly S. Peeples, Gregory F. Snyder, Timothy M. Heckman   +4 more
doaj   +1 more source

Forming Young Bulges within Existing Disks: Statistical Evidence for External Drivers

, 2003
Contrary to traditional models of galaxy formation, recent observations suggest that some bulges form within preexisting disk galaxies. Such late-epoch bulge formation within disks seems to be linked to disk gas inflow and central star formation, caused ...
Abraham R. G., Andredakis Y. C., Becker R. H., Elizabeth J. Barton, Ellis R. S., Friedli D., Kauffmann G., Rolf A. Jansen, Schwarzkopf U., Sheila J. Kannappan, Shioya Y., Tully R. B.   +11 more
core   +1 more source

HI Observations of Interacting Galaxy Pair NGC 4038/9 [PDF]

, 2001
We present the results of new radio interferometer HI line observations for the merging galaxy pair NGC 4038/9 (`The Antennae'), obtained using the Australia Telescope Compact Array.
Amram, Arp, Arp, Barnes, Barnes, Barnes, Bärbel Koribalski, Clark, Clutton-Brock, Condon, Condon, de Vaucouleurs, Douglas, Duc, Duc, Elmegreen, Elmegreen, Elmegreen, Fabbiano, Fabbiano, Fabbiano, Fischer, Gao, Gioia, Giovanelli, Goa, Hernquist, Hibbard, Hibbard, Hibbard, Huchtmeier, Hummel, Högbom, Karachentsev, Keith Jones, Kunze, Maccacaro, Mahoney, Mihos, Mihos, Mihos, Minkowski, Mirabel, Mirabel, Mirabel, Neff, Nikola, Parker, Pisano, Read, Roberts, Rubin, Sanders, Sanders, Sansom, Sault, Schweizer, Scott Gordon, Shapley, Stanford, Steer, Stocke, Toomre, Toomre, van der Hulst, Vigroux, Whitmore, Whitmore, Wilson, Young   +69 more
core   +3 more sources

Dynamical stability and galaxy evolution in LSB disk galaxies [PDF]

AIP Conference Proceedings, 1997
We demonstrate that, due to their low surface mass density and large dark matter content, LSB disks are quite stable against the growth of global bar modes. However, they may be only marginally stable against local disk instabilities. We simulate a collision between an LSB and HSB galaxy and find that, while the HSB galaxy forms a strong bar, the ...
Mihos, C., McGaugh, S. S., Blok, E. de
openaire   +3 more sources

Population Synthesis Models for Normal Galaxies with Dusty Disks [PDF]

Journal of Astronomy and Space Sciences, 2003
To investigate the SEDs of galaxies considering the dust extinction processes in the galactic disks, we present the population synthesis models for normal galaxies with dusty disks. We use PEGASE (Fioc & Rocca-Volmerange 1997) to model them with standard
Kyung-Won Suh, Mi-Ryang Kim
doaj   +1 more source

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

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

Disk Galaxies Are Self-similar: The Universality of the H i-to-Halo Mass Ratio for Isolated Disks

The Astrophysical Journal Letters, 2023
Observed scaling relations in galaxies between baryons and dark matter global properties are key to shed light on the process of galaxy formation and on the nature of dark matter.
Marie Korsaga, Benoit Famaey, Jonathan Freundlich, Lorenzo Posti, Rodrigo Ibata, Christian Boily, Katarina Kraljic, D. Esparza-Arredondo, C. Ramos Almeida, Jean Koulidiati   +9 more
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