Results 111 to 120 of about 32,916 (218)

JWST Reveals Bulge-dominated Star-forming Galaxies at Cosmic Noon

The Astrophysical Journal Letters
Hubble Space Telescope imaging shows that most star-forming galaxies at cosmic noon—the peak of cosmic star formation history—appear disk-dominated, leaving the origin of the dense cores in their quiescent descendants unclear.
Chloë E. Benton, Erica J. Nelson, Tim B. Miller, Rachel Bezanson, Justus Gibson, Abigail I Hartley, Marco Martorano, Sedona H. Price, Katherine A. Suess, Arjen van der Wel, Pieter van Dokkum, John R. Weaver, Katherine E. Whitaker   +12 more
doaj   +1 more source

IllustrisTNG in the HSC-SSP: No Shortage of Thin Disk Galaxies in TNG50

The Astrophysical Journal
We perform a thorough analysis of the projected shapes of nearby galaxies in both observations and cosmological simulations. We implement a forward-modeling approach to overcome the limitations in previous studies, which hinder accurate comparisons ...
Dewang Xu, Hua Gao, Connor Bottrell, Hassen M. Yesuf, Jingjing Shi   +4 more
doaj   +1 more source

Dark matter and galaxy rotation curves [PDF]

, 2017
Cosmological N-body simulations on structure formation in a Λ−CDM scenario point to a mass density distribution of dark matter, in local objects like galaxies, that are in strong tension with recent observations on low surface brightness galaxies ...
López Fune, Ernesto
core  

The SAGA Survey. VI. The Size–Mass Relation for Low-mass Galaxies Across Environments

The Astrophysical Journal
We investigate how Milky Way (MW)–like environments influence the sizes and structural properties of low-mass galaxies by comparing satellites of MW analogs from the Satellites Around Galactic Analogs (SAGA) Survey with two control samples: an ...
Yasmeen Asali, Marla Geha, Erin Kado-Fong, Yao-Yuan Mao, Risa H. Wechsler, Mithi A. C. de los Reyes, Imad Pasha, Nitya Kallivayalil, Ethan O. Nadler, Erik J. Tollerud, Yunchong Wang, Benjamin Weiner, John F. Wu   +12 more
doaj   +1 more source

Statistical methods in weak gravitational lensing

, 2015
This thesis studies several topics in the area of weak gravitational lensing and addresses some key statistical problems within this subject. A large part of the thesis concerns the measurement of galaxy shapes for weak gravitational lensing and the ...
Kacprzak, T
core  

The internal structure of Cold Dark Matter Haloes [PDF]

, 2010
Currently favoured cosmological models for structure formation of the Universe assume that a large fraction of the mass of the Universe is 'dark'. The evidence for dark matter comes from observations of its gravitational influence.
Vogelsberger, M., Vogelsberger, Mark P.
core  

The Link between Galaxy Structure Properties and Star Formation in Local Galaxies

The Astrophysical Journal
To investigate the role of morphology in galaxy evolution, we analyze the relationships between galaxy structure, star formation, and H i gas content.
Zhimin Zhou, Wenwen Wang
doaj   +1 more source

Testing the Standard Cosmological Model [PDF]

, 2011
This thesis exploits the wealth of information contained in the existing cosmological surveys, and demonstrates how the use of tools such as two-point statistics permit the extraction of such information.
SAWANGWIT, UTANE
core  

Quantifying galaxy structure

, 2018
Die vorliegende Arbeit beschäftigt sich mit der Erforschung und Quantifizierung von Galaxienmorphologien. Weiters handelt es sich um eine Studie, welche die Entstehung und Evolution von Galaxien als Funktion der Galaxienmorphologie untersucht.
Sreejith, Sreevarsha
core   +1 more source

VMC galaxy structures

, 2019
Formation and evolution of galaxies are mainly driven by mergers/interactions. In low red shift, minor mergers play a significant role. It is believed that they are the fundamental components in the formation of the halo of galaxies like Milky Way and in building the outskirts of massive elliptical galaxies. The signatures of these mergers/interactions
openaire   +2 more sources