Results 81 to 90 of about 46,211 (288)

Quasi‐Stellar Objects, Ultraluminous Infrared Galaxies, and Mergers

The Astrophysical Journal, 2001
We test the hypothesis that QSOs are formed via strong tidal interactions or mergers, initially going through an ultraluminous infrared phase. Our approach is to look for traces of this phase in the host galaxies of QSOs. We select a sample of low-redshift bona fide QSOs that may be in a transitionary stage between ultraluminous infrared galaxies ...
Gabriela Canalizo, Alan Stockton
openaire   +3 more sources

How do minor mergers promote inside-out growth of ellipticals, transforming the size, density profile and dark matter fraction?

, 2012
There is observational evidence for inside-out growth of elliptical galaxies since $z \gtrsim 2-3$, which is not driven by in-situ star formation. Many systems at high redshift have small sizes $\sim 1kpc$ and surface brightness profiles with low Sersic ...
Auger, Auger, Barnabè, Bell, Bell, Bezanson, Bois, Bournaud, Bournaud, Boylan-Kolchin, Brinchmann, Bruzual, Buitrago, Buitrago, Bundy, Burkert, Caon, Cappellari, Cappellari, Carrasco, Cenarro, Cimatti, Cimatti, Ciotti, Cole, Conroy, Covington, Cox, Crocker, Daddi, Damjanov, De Lucia, De Lucia, de Vaucouleurs, Dekel, Dekel, Domínguez Sánchez, Dubinski, Duc, Edwards, Faber, Farouki, Feldmann, Feldmann, Ferreras, Ferré-Mateu, Franx, Gabor, Gerhard, Governato, Graham, Guo, Guo, Guo, Hausman, Hernquist, Hilz, Hopkins, Hopkins, Hopkins, Hopkins, Hoyos, Hyde, J. P. Ostriker, Jiang, Joung, Kauffmann, Kauffmann, Kereš, Kereš, Khochfar, Kobayashi, Kormendy, Kormendy, Kriek, Kriek, Kriek, Lackner, Lackner, Laporte, Longhetti, Lotz, López-Sanjuan, López-Sanjuan, Malin, Man, Mancini, Matteucci, McIntosh, McLure, Michael Hilz, Miller, Misgeld, Mo, Moster, Mármol-Queraltó, Naab, Naab, Naab, Naab, Naab, Naab, Naab, Nelson, Newman, Nipoti, Nipoti, Nipoti, Nipoti, Onodera, Oser, Oser, Ostriker, Ostriker, Pipino, Prantzos, Quilis, Ricciardelli, Robaina, Robertson, Ruszkowski, Saglia, Saracco, Saracco, Schweizer, Searle, Sersic, Shen, Springel, Szomoru, Tal, Taylor, Thomas, Thomas, Thomas, Thorsten Naab, Tiret, Toft, Toft, Toft, Tran, Treu, Trujillo, Trujillo, Trujillo, Trujillo, Trujillo, Trujillo, Valentinuzzi, van der Wel, van der Wel, van der Wel, van der Wel, van Dokkum, van Dokkum, van Dokkum, van Dokkum, van Dokkum, Villumsen, Wang, Weinzirl, Wetzstein, Whitaker, Whitaker, White, White, Williams, Williams, Wuyts, Wuyts, Yang, Young, Zirm   +172 more
core   +1 more source

The impact of stellar mergers

, 2019
There are several indications that stellar mergers are common outcomes of binary evolution. Mergers involving white dwarfs are linked to several classes of transients, such as supernova type, and may leave imprints in other observables as well, e.g. the WD mass distribution.
openaire   +1 more source

Structure and evolution of high-mass stellar mergers [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
In young dense clusters repeated collisions between massive stars may lead to the formation of a very massive star (above 100 Msun). In the past the study of the long-term evolution of merger remnants has mostly focussed on collisions between low-mass stars (up to about 2 Msun) in the context of blue-straggler formation.
Glebbeek, E., Gaburov, E., Portegies Zwart, S., Pols, O.R.   +3 more
openaire   +3 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Cosmological interpretation of the color-magnitude diagrams of galaxy clusters

, 2018
We investigate the color-magnitude diagram (CMD) of cluster galaxies in the hierarchical $\Lambda$-CDM cosmological scenario using both single stellar populations and simple galaxy models.
Cariddi, Stefano, Chiosi, Cesare, D'Onofrio, Mauro, Sciarratta, Mauro   +3 more
core   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Where Has All the R-process Gone? Timescales for Gamma-Ray Burst Kilonovae to Enrich Their Host Galaxies

The Astrophysical Journal
Neutron star (NS) mergers are currently the only observed source of r -process production in the Universe. Yet, it is unclear how much r -process mass from these mergers is incorporated into star-forming gas to enrich stars.
Anya E. Nugent, Alexander P. Ji, Wen-fai Fong, Hilay Shah, Freeke van de Voort   +4 more
doaj   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Simulating a Stellar Binary Merger

Education and Research Archive
The discovery of luminous red nova (LRN) V1309 Sco revealed a binary star system prior to its outburst in brightness, with an exponentially decaying orbital separation. This allowed, for the first time, theoretical models of contact stellar mergers to be verified by observations, although a direct comparison had not been made.
openaire   +1 more source