Results 91 to 100 of about 1,672 (191)

Testing modified Newtonian dynamics in the Milky Way [PDF]

, 2015
Modified Newtonian dynamics (MOND) is an empirical theory originally proposed to explain the rotation curves of spiral galaxies by modifying the gravitational acceleration, rather than by invoking dark matter. Here, we set constraints on MOND using an up-
Bertone, G.; id_orcid, Iocco F., Bertone, Gianfranco, Pato, Miguel, Iocco, Fabio, Bertone G., Pato, Miguel,, Iocco, F., Pato M., Pato, M., Iocco, Fabio [UNESP]   +10 more
core   +1 more source

Photometric Analysis of 30 Contact Binaries in M31

The Astrophysical Journal
M31, as the largest galaxy in the Local Group, is of significant importance for the study of stellar formation and evolution. Based on the data of 5859 targets observed in M31 by Gu et al., we selected 30 contact binaries by visual inspection for further
Xiang Gao, Kai Li, Li-Heng Wang, Hai-bo Yuan, Hong-rui Gu, Ya-Ni Guo   +5 more
doaj   +1 more source

Validating the CROCODILE Model Within the AGORA Galaxy Simulation Framework

Galaxies
Numerical galaxy formation simulations are sensitive to numerical methods and sub-grid physics models, making code comparison projects essential for quantifying uncertainties.
Pablo Granizo, Yuri Oku, Kentaro Nagamine   +2 more
doaj   +1 more source

Small and Large Scale Dynamics in the Milky Way [PDF]

, 2010
This thesis contains dynamical analysis on four different scales: the Solar system, the Sun itself, the Solar neighbourhood, and the central region of the Milky Way galaxy.
Gardner, Esko
core  

Breaking Down the CosmoGEMS: Toward Modeling and Understanding Globular Cluster Stellar Streams in a Fully Cosmological Context

The Astrophysical Journal
Next-generation surveys are expected to uncover thousands of globular cluster (GC) stellar streams, motivating the need for a theoretical framework that produces realistic GC streams in a fully cosmological, Milky Way–like environment.
Nondh Panithanpaisal, Robyn E. Sanderson, Carl L. Rodriguez, Tjitske Starkenburg, Sarah Pearson, Ana Bonaca, Philip F. Hopkins, Brian T. Cook, Arpit Arora, Newlin C. Weatherford   +9 more
doaj   +1 more source

An improved model of chemical evolution within the Milky Way galaxy

, 2016
This thesis project involves the improvement of existing computer code, which is used in modeling the galactic chemical evolution (GCE) of the Milky Way Galaxy. The ultimate goal of a GCE analysis is to reliably predict abundances for all observationally
Lerman, Andrew Ryan
core  

A COMPLETE SPECTROSCOPIC SURVEY OF THE MILKY WAY SATELLITE SEGUE 1: THE DARKEST GALAXY [PDF]

, 2011
We present the results of a comprehensive Keck/DEIMOS spectroscopic survey of the ultra-faint Milky Way satellite galaxy Segue 1. We have obtained velocity measurements for 98.2% of the stars within 67 pc (10', or 2.3 half-light radii) of the center of ...
James S. Bullock, Joe Wolf, Kaplinghat, Manoj, Gregory D. Martinez, Willman, Beth, Joshua D. Simon, Louis E. Strigari, Strigari, Louis E., Beth Willman, Manoj Kaplinghat, Kirby, Evan N., Choi, Philip I., Marla Geha, Tollerud, Erik J., Evan N. Kirby, Martinez, Gregory D., Wolf, Joe, Geha, Marla, Erik J. Tollerud, Minor, Quinn E., Bullock, James S., Philip I. Choi, Simon, Joshua D., Quinn E. Minor   +23 more
core   +1 more source

Homogeneous Stellar Atmospheric Parameters and 22 Elemental Abundances for FGK Stars Derived from LAMOST Low-resolution Spectra with DD-PAYNE

The Astrophysical Journal Supplement Series
A deep understanding of our Galaxy calls for detailed decomposition of its stellar populations via their chemical fingerprints. This requires precise stellar abundances of many elements for a large number of stars.
Meng Zhang, Maosheng Xiang, Yuan-Sen Ting, Anish Mayur Amarsi, Hua-Wei Zhang, Jianrong Shi, Haibo Yuan, Haining Li, Jiahui Wang, Yaqian Wu, Tianmin Wu, Lanya Mou, Hong-Liang Yan, Jifeng Liu   +13 more
doaj   +1 more source

Investigating Milky Way Structure with Gaia

, 2019
We present an investigation of the structure and characteristics of the Milky Way Galaxy using data from the Gaia mission\u27s second data release (DR2).

core  

PhDLspec: Physical Prior Embedded Deep Learning Method for Spectroscopic Determination of Stellar Labels in High-dimensional Parameter Space

The Astrophysical Journal
Unlocking all the physical information encoded in low-resolution spectra poses a significant challenge for astronomical survey analysis. Such a task demands modeling spectra and optimizing astrophysical parameters in high-dimensional space as a ...
Tianmin Wu, Maosheng Xiang, Jianrong Shi, Meng Zhang, Lanya Mou, Hong-Liang Yan, A-Li Luo   +6 more
doaj   +1 more source