Results 141 to 150 of about 157,333 (319)

Collision-induced galaxy formation: semi-analytical model and multi-wavelength predictions

, 2003
A semi-analytic model is proposed that couples the Press-Schechter formalism for the number of galaxies with a prescription for galaxy-galaxy interactions that enables to follow the evolution of galaxy morphologies along the Hubble sequence.
Balland, Christophe, Devriendt, Julien E. G., Silk, Joe   +2 more
core   +3 more sources

Integrative cross‐tissue analysis unveils complement‐immunoglobulin augmentation and dysbiosis‐related fatty acid metabolic remodeling during mammalian aging

iMeta, EarlyView.
Our study provides a comprehensive multi‐omics profile of aging, integrating proteomic, metabolomic, and metagenomic analyses across diverse tissues and plasma. We identified the synergistic amplification of the circulating complement system and tissue‐wide immunoglobulin accumulation as key molecular drivers of inflammaging.
Feng Zhang, Rong Li, Yasong Liu, Jinliang Liang, Yihang Gong, Cuicui Xiao, Jianye Cai, Tingting Wang, Qiang You, Jiebin Zhang, Haitian Chen, Jiaqi Xiao, Yingcai Zhang, Yang Yang, Hua Li, Jia Yao, Qi Zhang, Jun Zheng   +17 more
wiley   +1 more source

Quantifying Bursty Star Formation in Dwarf Galaxies

The Open Journal of Astrophysics
Dwarf galaxy star formation histories are theoretically expected to be bursty, potentially leaving distinct imprints on their chemical evolution. We propose that episodic starbursts with quiescent periods longer than ~100 Myr should lead to discontinuous
Yuan-Sen Ting, Alexander Ji
doaj   +1 more source

The Formation and Evolution of Disk Galaxies

, 1998
We review some of our recent progress in modelling the formation of disk galaxies in the framework of hierarchical structure formation. Our model is not only consistent with the local observations, but also provides a good description of disk evolution out to redshift z~1.
Mao, Shude, Mo, H. J., White, Simon D. M.   +2 more
openaire   +2 more sources

The Distribution of Galaxies in Relation to Their Formation and Evolution [PDF]

Symposium - International Astronomical Union, 1974
The distribution of galaxies on the sky is not random, but has structure on a scale of ~ 30 Mpc. Similar structure in the cosmic background radiation is not present. Another expected source of structure in the background radiation is the finite size of the light horizon in the early Universe. The lack of observable structure in the background radiation
openaire   +2 more sources

Utility of circulating tumor DNA in secondary liver malignancies: What we know and what is to come

Journal of Surgical Oncology, EarlyView.
Abstract Secondary liver malignancies are a serious and challenging global health concern. Secondary metastasis to the liver is most commonly from colorectal cancer that has metastatically spread through splanchnic circulation. Metastatic diseases can portend poor prognosis due to the progressive nature typically found on detection.
Chase J. Wehrle, Noah X. Tocci, Keyue Sun, Chunbao Jiao, Hanna Hong, Abby Gross, Erlind Allkushi, Melis Uysal, Maureen Whitsett Linganna, Katheryn Stackhouse, Koji Hashimoto, Andrea Schlegel, R. Matthew Walsh, Charles Miller, David C. H. Kwon, Federico Aucejo   +15 more
wiley   +1 more source

Evidence for AGN Feedback in Galaxy Clusters and Groups

Advances in Astronomy, 2012
The current generation of flagship X-ray missions, Chandra and XMM-Newton, has changed our understanding of the so-called “cool-core” galaxy clusters and groups.
Myriam Gitti, Fabrizio Brighenti, Brian R. McNamara   +2 more
doaj   +1 more source

Formation and evolution of bars in disc galaxies

, 2002
I follow a bar from its formation, via its evolution, to its destruction and, perhaps, regeneration. I discuss the main features at each stage and particularly the role of the halo. Bars can form even in sub-maximum discs. In fact, such bars can be stronger than bars which have grown in maximum discs.
openaire   +3 more sources

Galaxy Formation and Evolution since z = 1 [PDF]

, 2006
Determination of the star formation rate can be done using mid-IR photometry or Balmer line luminosity after a proper correction for extinction effects. Both methods show convergent results while those based on UV or on [OII]3727 luminosities underestimate the SFR by factors ranging from 5 to 40 for starbursts and for luminous IR galaxies, respectively.
Hammer, François, Flores, Hector, Liang, Yanchun, Zheng, Xianzhong, Elbaz, David, Cesarsky, Catherine   +5 more
openaire   +6 more sources

Evaluation of Arclight Frugal Smartphone Video Otoscopy

The Laryngoscope, EarlyView.
Frugal innovations are essential in low‐resource settings to provide cost‐effective medical solutions without compromising functionality. The Arclight, which functions as both an ophthalmoscope and an otoscope, is an effective, low‐cost tool for (video) ear examinations in low‐resource settings.
Christoph R. Buhr, Katharina Bahr‐Hamm, Christopher Seifen, Johannes Pordzik, Jonas Eckrich, Thomas Murray, Christoph Matthias, Andrew Blaikie   +7 more
wiley   +1 more source