Results 1 to 10 of about 25,727 (263)

Galaxy Evolution with Manifold Learning [PDF]

Entropy
Matter in the early Universe was nearly uniform, and galaxies emerged through the gravitational growth of small primordial density fluctuations. Astrophysics has been trying to unveil the complex physical phenomena that have caused the formation and ...
Tsutomu T. Takeuchi, Suchetha Cooray, Ryusei R. Kano   +2 more
doaj   +2 more sources

Morphologies of Galaxies at z ≳ 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z ∼ 12

The Astrophysical Journal, 2023
We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2–5 μ m imaging. Our sample consists of 22 galaxy candidates identified by stringent dropout and photo- z criteria in GLASS, CEERS, SMACS J0723, and Stephan’s Quintet flanking fields ...
Yoshiaki Ono, Yuichi Harikane, Masami Ouchi, Hidenobu Yajima, Makito Abe, Yuki Isobe, Takatoshi Shibuya, John H. Wise, Yechi Zhang, Kimihiko Nakajima, Hiroya Umeda   +10 more
doaj   +1 more source

LIMFAST. I. A Seminumerical Tool for Line Intensity Mapping

The Astrophysical Journal, 2023
We present LIMFAST, a seminumerical code for simulating high-redshift galaxy formation and cosmic reionization as revealed by multitracer line intensity mapping (LIM) signals.
Lluís Mas-Ribas, Guochao Sun, Tzu-Ching Chang, Michael O. Gonzalez, Richard H. Mebane   +4 more
doaj   +1 more source

Monolithic View of Galaxy Formation and Evolution

Galaxies, 2014
We review and critically discuss the current understanding of galaxy formation and evolution limited to Early Type Galaxies (ETGs) as inferred from the observational data and briefly contrast the hierarchical and quasi-monolithic paradigms of formation ...
Cesare Chiosi, Emiliano Merlin, Lorenzo Piovan, Rosaria Tantalo   +3 more
doaj   +1 more source

LIMFAST. II. Line Intensity Mapping as a Probe of High-redshift Galaxy Formation

The Astrophysical Journal, 2023
The epoch of reionization (EoR) offers a unique window into the dawn of galaxy formation, through which high-redshift galaxies can be studied by observations of both themselves and their impact on the intergalactic medium.
Guochao Sun, Lluís Mas-Ribas, Tzu-Ching Chang, Steven R. Furlanetto, Richard H. Mebane, Michael O. Gonzalez, Jasmine Parsons, A. C. Trapp   +7 more
doaj   +1 more source

Disk Galaxy Models Driven by Stochastic Self-Propagating Star Formation

Open Astronomy, 2010
We present a model of chemical and spectrophotometric evolution of disk galaxies based on a stochastic self-propagating star formation scenario. The model incorporates galaxy formation through the process of accretion, chemical and photometric evolution ...
Mineikis T., Vansevičius V.
doaj   +1 more source

DESI Survey Validation Data in the COSMOS/Hyper Suprime-Cam Field: Cool Gas Trace Main-sequence Star-forming Galaxies at the Cosmic Noon

The Astrophysical Journal, 2023
We present the first result in exploring the gaseous halo and galaxy correlation using the Dark Energy Spectroscopic Instrument survey validation data in the Cosmic Evolution Survey (COSMOS) and Hyper Suprime-Cam field.
Siwei Zou, Linhua Jiang, Zheng Cai, John Moustakas, Zechang Sun, Zhiwei Pan, Jiani Ding, Jaime E. Forero-Romero, Hu Zou, Yuan-sen Ting, Matthew Pieri, Steven Ahlen, David Alexander, David Brooks, Arjun Dey, Andreu Font-Ribera, Satya Gontcho A. Gontcho, Klaus Honscheid, Martin Landriau, Axel de la Macorra, Mariana Vargas Magana, Aaron Meisner, Ramon Miquel, Michael Schubnell, Gregory Tarlé, Zhimin Zhou   +25 more
doaj   +1 more source

TOPoS

Astronomy & Astrophysics
Context. One technique for determining stellar ages is to compare the position of a star in the Hertzsprung-Russell diagram to theoretical stellar evolutionary tracks.
Bonifacio P., Lebreton Y., Koutsouridou I., Zou Y. P., Romano D., Salvadori S., Sbordone L., Monaco L., Caffau E., Spite M., François P.   +10 more
doaj   +1 more source

The impact of radial migration on disk galaxy star formation histories

Astronomy & Astrophysics
Knowledge of the spatially resolved star formation history (SFH) of disk galaxies provides crucial insight into disk assembly, quenching, and chemical evolution.
Minchev I., Attard K., Ratcliffe B., Martig M., Walcher J., Khoperskov S., Bernaldez J. P., Marques L., Sysoliatina K., Chiappini C., Steinmetz M., de Jong R. S.   +11 more
doaj   +1 more source

The Gaia-ESO survey: Open clusters as tracers of galactic chemical evolution

Astronomy & Astrophysics
Aims. We investigate the formation and evolutionary trajectory of the Milky Way’s inner and outer galactic regions using stars from open clusters in the Gaia-ESO OC survey. Methods. Using numerical simulations from Chempy, we leveraged Markov chain Monte
Boucher K., Worley C. C., Gilmore G., Stonkutė E., Magrini L., Drazdauskas A., Bragaglia A., Tautvaišienè G., Bensby T., Jiménez-Esteban F., Martell S., Randich S., Damiani F.   +12 more
doaj   +1 more source