Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Milky Way dynamics"'
Autor:
Yang Su, Shiyu Zhang, Yan Sun, Ji Yang, Qing-Zeng Yan, Shaobo Zhang, Zhiwei Chen, Xuepeng Chen, Xin Zhou, Lixia Yuan
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L6 (2024)
We study the gas inflows toward the Galactic Central Molecular Zone (CMZ) based on the gas morphological and kinematic features from the Milky Way Imaging Scroll Painting in the region of l = 1.°2–19.°0 and ∣ b ∣ ≲ 3.°0. We find that the n
Externí odkaz:
https://doaj.org/article/f658a64fff9a482495cc72d5d3845c47
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L4 (2024)
We search for globular clusters (GCs) trapped in resonances with the bar of the Milky Way (MW). By integrating their orbits in a potential with a decelerating bar, we select 10 whose orbits are significantly changed by its presence. Most of these are
Externí odkaz:
https://doaj.org/article/f9ff194c19d04f3e981f4a87a32cd195
Autor:
Evan Butler, Andrea Kunder, Zdenek Prudil, Kevin R. Covey, Macy Ball, Carlos Campos, Kaylen Gollnick, Julio Olivares Carvajal, Joanne Hughes, Kathryn Devine, Christian I. Johnson, A. Katherina Vivas, R. Michael Rich, Meridith Joyce, Iulia T. Simion, Tommaso Marchetti, Andreas J. Koch-Hansen, William I. Clarkson, Rebekah Kuss
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L33 (2024)
Patchick 99 is a candidate globular cluster located in the direction of the Galactic bulge, with a proper motion almost identical to the field and extreme field star contamination. A recent analysis suggests it is a low-luminosity globular cluster wi
Externí odkaz:
https://doaj.org/article/79909a585b8244678aad812edb9bd4b0
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 1, p L4 (2024)
The phase space, as coded by kinematic parameters and chemical abundances, is crucial for understanding the formation of the Galactic disk. Using red giant stars from the Galactic thin disk with [Fe/H] > − 0.8 and low- α ratios identified in LAMOS
Externí odkaz:
https://doaj.org/article/17c9df5617c94e568f38018da1405673
Autor:
Nicolás Garavito-Camargo, Adrian M. Price-Whelan, Jenna Samuel, Emily C. Cunningham, Ekta Patel, Andrew Wetzel, Kathryn V. Johnston, Arpit Arora, Robyn E. Sanderson, Lehman Garrison, Danny Horta
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 100 (2024)
Understanding the physical mechanism behind the formation of a corotating thin plane of satellite galaxies, like the one observed around the Milky Way (MW), has been challenging. The perturbations induced by a massive satellite galaxy, like the Large
Externí odkaz:
https://doaj.org/article/ad44784908ab44308a1bb3a62cd6cd09
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 167 (2024)
Numerical simulations indicate that correlations exist between the velocity distributions of stars and dark matter (DM). We study the local DM velocity distribution based on these correlations. We select K giants from LAMOST DR8 cross-matched with Ga
Externí odkaz:
https://doaj.org/article/e98e86ff29344edc8ff220ccb42714da
Autor:
Vedant Chandra, Vadim A. Semenov, Hans-Walter Rix, Charlie Conroy, Ana Bonaca, Rohan P. Naidu, René Andrae, Jiadong Li, Lars Hernquist
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 112 (2024)
We illustrate the formation and evolution of the Milky Way over cosmic time, utilizing a sample of 10 million red giant stars with full chemodynamical information, including metallicities and α -abundances from low-resolution Gaia XP spectra. The ev
Externí odkaz:
https://doaj.org/article/83122b0b51084aa685f143e220a14e94
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 70 (2024)
The escape velocity profile of the Milky Way offers a crucial and independent measurement of its underlying mass distribution and dark matter (DM) properties. Using a sample of stars from the third data release of Gaia with 6D kinematics and strict q
Externí odkaz:
https://doaj.org/article/20f595b7cc4e443abd04fdf9094d63ad
Autor:
Jihye Hong, Timothy C. Beers, Young Sun Lee, Yang Huang, Yutaka Hirai, Jonathan Cabrera Garcia, Derek Shank, Shuai Xu, Haibo Yuan, Mohammad K. Mardini, Thomas Catapano, Gang Zhao, Zhou Fan, Jie Zheng, Wei Wang, Kefeng Tan, Jingkun Zhao, Chun Li
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 273, Iss 1, p 12 (2024)
Photometric stellar surveys now cover a large fraction of the sky, probe to fainter magnitudes than large-scale spectroscopic surveys, and are relatively free from the target selection biases often associated with such studies. Photometric-metallicit
Externí odkaz:
https://doaj.org/article/59f813e9f7da436c9480c01d24f83f27
Autor:
Ruizhi Zhang, Tadafumi Matsuno, Haining Li, Wako Aoki, Xiang-Xiang Xue, Takuma Suda, Gang Zhao, Yuqin Chen, Miho N. Ishigaki, Jianrong Shi, Qianfan Xing, Jingkun Zhao
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 174 (2024)
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation. Understanding the origin of VMP stars requires comprehensive studies of their chemical comp
Externí odkaz:
https://doaj.org/article/fb02387002c6405c81c9bbae3be98d44